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Dissertations / Theses on the topic 'Braking System'
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1
Kees, Markus. "Intelligent automotive braking system." Thesis, Coventry University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247240.
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2
Batyoha, D., and S. Kirichenko. "Anti-lock braking system." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40516.
Full textAbstract:
Anti-lock braking system (ABS) is an automobile
safety system that allows the wheels on a motor vehicle to
maintain tractive contact with the road surface according to driver
inputs while braking, preventing the wheels from locking up and
avoiding uncontrolled skidding
3
Gustafsson, Joakim. "AUTOMATIC BRAKING DISC ANALYSIS SYSTEM." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-28217.
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Volvo Group Truck Technology has the ambition to automate parts of their routine service. Therefore a project was launched to investigate which parts of the routine that could be automated. The idea of this project is to lower the time spent on the service and also improve the working environment for the personnel. The purpose of this thesis is to develop and build a conceptional prototype for a low-cost crack detecting sensor. This thesis is a part of a larger proof of concept project which Volvo GTT runs in cooperation with Robotdalen and Robot Application Center (RAC). The work done in this thesis has been based on literature studies, interviews and company visits. The gathered knowledge and observations was translated into what would be required to fit the needs. This thesis covers different techniques that could be used to detect flaws in braking discs. However, this thesis is mostly focused on one non-destructive method technique based on induced eddy currents. Several non-destructive techniques and conceptual designs has been tested and evaluated with varying results during this project. The result of this thesis was a design that reacts to discontinuities in conductive materials, such as the grey cast iron material used in the Volvo trucks braking discs. The results are represented as a voltage drop change and can be visualized by an oscilloscope. This study shows that the method of choice has the potential to be used as a crack detecting system and that the system can be built reliable with rather cheap components. Further development should aim towards making the design even cheaper and the components should be assembled on a PCB instead of a breadboard in order to make the system less sensitive to noise and easier to assemble alongside the trucks braking discs.
4
Lundin, Christopher. "Modeling of a Hydraulic Braking System." Thesis, KTH, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168924.
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The objective of this thesis is to derive an analytical model representing a reduced form of a mine hoist hydraulic braking system. Based primarily on fluid mechanical and mechanical physical modeling, along with a number of simplifying assumptions, the analytical model will be derived and expressed in the form of a system of differential equations including a set of static functions. The obtained model will be suitable for basic simulation and analysis of system dynamics, with the aim to capture the fundamentals regarding feedback control of the brake system pressure. The thesis will mainly cover hydraulic servo valve and brake caliper modeling including static modeling of brake lining stress-strain and disc spring deflectionforce characteristics. Nonlinearities such as servo valve hysteresis, saturation, effects of under- or overlapping spool geometry, flow forces, velocity limitations and brake caliper frictional forces have intentionally been excluded in order not to make the model overly complex. The hydraulic braking system will be described in detail and basic theory that is needed regarding fluid properties and fluid mechanics will also be covered so as to facilitate the reader in his understanding of the material presented in this work. Overall, the scope of this thesis is broad and more work remains in order to complement the model of the system both qualitatively and quantitatively. Although not complete in its simplified form and with known nonlinearities aside, the validity of the model in the lower frequency domain is confirmed by results given in form of measurements and dynamic simulation. Static analysis of the brake caliper model is also verified to be essentially correct when comparing calculated characteristics against actual measurements, as is also the case for the static models of the brake lining and disc-spring characteristics.
5
Mora, Luis Alberto. "Design of a FSAE braking system." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119947.
Full textAbstract:
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (page 42).
MIT Motorsports is a FSAE Electric team at MIT that designs, manufactures, and tests electric formula style racecars to compete in an annual international collegiate design competition. The braking system for the MY18 vehicle developed by MIT Motorsports must enable the driver to consistently and reliably decelerate the vehicle at the maximum rate allowed by the traction limit of the tires. Crucial engineering data needed for a well-informed design, such as the coefficient of friction of the brake pads, motivated the development of a custom brake dynamometer to empirically test for the required data. The brake dynamometer became a very valuable tool eventually being used to select an appropriate brake rotor material and the most effective cooling geometry for the brake rotors. The braking system also integrates a regenerative braking system that works in parallel with the hydraulic braking system for the purpose of recovering braking energy and thus increasing vehicle efficiency. The MY18 braking system, will increase the maximum vehicle deceleration by 50% compared to MY17 and allow for up to 1kW-Hr more of energy recovery compared to MY17 without compromising reliability or consistency.
by Luis Alberto Mora.
S.B.
6
Jandric, Kristian, and Lucas Andersson. "Anti-lock braking system for bicycles." Thesis, KTH, Mekatronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296316.
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An attempt was made to construct an ABS system that would both lock the wheel and release the brakes. The system would be mounted on a bicycle with v-brakes. It would then be tested if it could decrease the braking distance and if the system would respond fast enough. A literature study was made to learn what was needed for such a project. After many attempts of using re-purposed components an ABS system would eventually be built with a new stepper motor, and it was strong enough to lock the back wheels. Unfortunately the system could not be as thoroughly tested as expected, where only the reaction time of the system could be tested and not the braking distance due to a motor driver failure prior to the tests taking place. Due to shipping times and our budget and time constraints, further testing could not be done.Ett försök att bygga ett ABS system som både låser hjulet samt släpper på bromsen gjordes. Systemet skulle kunna monteras på en cykel med fälgbromsar. Systemet skulle testas genom att mäta skillnaden i bromssträcka samt om reaktionstiden var snabb nog. En litteraturstudie gjordes för att få tillräcklig kunskap om vad som krävdes för ett sådant projekt. Efter många försök med att använda olika återanvända komponenter kunde ett ABS system till slut konstrueras med hjälp av en ny stegmotor, som var stark nog för att låsa bakhjulet. Tyvärr kunde bara systemets reaktionstid testas och inte bromssträckans förändring. Detta berodde på en motordrivare slutade fungera. På grund av frakttider och en fast budget samt en tidsbegränsning, kunde inte ytterligare tester genomföras.
7
Ronghong, Xiao, and Wang Hai. "Car Automatic Braking System : based on original reverse warning system." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-11643.
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An original ultrasonic reverse warning system is a new system that can assist drivers while car is braking. It is includes ultrasonic emitter and receiver that can producing and receiving the ultrasonic waves to determine the distance between car and obstacle. But it is not good enough for the safety of cars, in this paper, we are meant to design a system that can help drivers stop the car automatically, an electronic circuit was constructed. According to this circuit we design, a signal was produced to the braking system of car based on the distance between car and obstacle for a safe braking purpose. Error is also discussed and during the experiment, the improvement for the original system has also achieved.
8
Penny, Wietsche Clement William. "Anti-lock braking system performance on rough terrain." Diss., University of Pretoria, 2015. http://hdl.handle.net/2263/56099.
Full textAbstract:
The safety of motor vehicles is of primary concern in the modern age as the death rate of road users are still at unacceptably high numbers and is the second largest cause for unnatural death worldwide. Consumers often expect unrealistic performance and comfort levels from their vehicles regardless of terrain or conditions, and the Sport Utility Vehicle class is often under the most pressure to meet these high expectations.
Literature reveals that the performance of Anti-lock Braking Systems (ABS) deteriorates on rough off-road terrains due to a number of factors such as axle oscillations, wheel speed fluctuations and deficiencies in the algorithms. This leads to complications such as loss of vertical contact between the tyres and the terrain and poor contact patch generation that eventually results in reduced longitudinal force generation.
In this study, an ABS modulator is retrofitted on a test vehicle to perform brake pressure control. The hydraulic modulator is controlled by an embedded computer, running the Linux operating system, onto which a slightly modified version of the Bosch ABS algorithm is coded in C-language. Brake tests are conducted with the vehicle on hard concrete terrains for both smooth roads and rough Belgian paving. The algorithm is also implemented in Matlab/Simulink using co-simulation with a validated non-linear full vehicle ADAMS model employing a validated FTire tyre model. The co-simulation model was validated with the test data on both flat and rough terrains and experimental results correlate well with simulation results when the recorded brake pressures from the test data are given as input to the simulation model.
Test data and simulation results indicate that wheel speed fluctuations can cause inaccuracies in the estimation of vehicle velocity and excessive noise on the derived rotational acceleration values. This leads to inaccurate longitudinal slip calculation and poor control decisions respectively. Although possible solutions to the identified problem are not explored in detail, the developed simulation model and test vehicle can be used to test improved ABS algorithms and suspension control strategies to solve the deterioration of ABS performance on rough terrain.Dissertation (MEng)--University of Pretoria, 2015.
tm2016
Mechanical and Aeronautical Engineering
MEng
Unrestricted
9
Veppathur, Sivaramakrishnan Srikanth. "Discrete Tire Modeling for Anti-lock Braking System Simulations." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51424.
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Tires play an extremely important role in the operation of a vehicle as they transmit forces between the ground and the vehicle. Consistent efforts have been made over the years towards modeling and simulation of tires and more recently, there has been an increasing need to understand the transient response of tires to various high-frequency events such as anti-lock braking and short-wavelength disturbances from the road. Major thrust has been provided by the tire industry to develop simulation models that accurately predict the dynamic response of tires without the use of computationally intensive tools such as FEA.The objective of this research is to explain the development, implementation and validation of a simulation tool based on a dynamic tire model that would assist in the analysis of the effect of tire belt vibrations on the braking performance of a vehicle. A rigid ring tire model, tandem elliptical cam enveloping model and a rule-based ABS model have been developed for this purpose. These were combined together in a quarter vehicle model and implemented in Matlab-Simulink. These models were developed for adaptation with CarSim to provide a simulation tool that can be utilized in both tire and vehicle design processes. In addition to model implementation, a parameterization procedure was developed to estimate the parameters of the rigid ring tire and enveloping model based on experimental data for a given tire. Validation studies have also been performed to ensure the accuracy and validity of the tire model. Following this, the braking performance of ABS under different road surfaces were evaluated. Based on the simulation results, final conclusions were drawn with regards to the analysis and detailed recommendations for future work directed towards the improvement of the tool were provided.
Master of Science
10
Simpson, Nick. "Investigation into an alternative electrically actuated braking system for aircraft." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659106.
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Modern commercial aircraft predominantly employ hydraulically actuated multi-disk wheel-brakes on their main landing gears which are used to control the velocity of the aircraft during landing and ground operations. In recent years, investigations into the electrical actuation of the wheel-brakes have shown a number of advantages ranging from better energy efficiency to improved reliability and maintainability. Electrically actuated braking systems tend to employ a plurality of electric brake actuators featuring a high-speed brushless dc motor coupled to a ball/roller-screw through a reduction gear. This arrangement exhibits a high force-density and long stroke, however, the three-phase power inverter, filter and power conductor requirements of each actuator results in a considerable overall system mass when compared to a hydraulic counterpart whose components and operating pressure have been optimised over many years of in-flight service. This thesis investigates the feasibility of an alternative electric braking system which has the potential to reduce the overall braking system mass through the use of a direct drive non-commutated electric brake actuator topology. A permanent magnet tubular linear actuator topology is identified as an attractive candidate. Due to the short-duty and high force-density requirements of the electric brake actuator it is desirable to take account of the electromagnetic and thermal aspects of the design simultaneously. Therefore, a coupled electromagnetic and transient thermal design methodology is developed. It is found that a compromise exists between the accuracy and the computation time of the electromagnetic and thermal analyses. A procedure for efficiently constructing and analysing finite element models is developed to minimise the computational cost of the electromagnetic analysis. A method of automatically constructing and parameterising lumped parameter thermal equivalent circuits with nodes arranged in a regular mesh pattern is proposed which maintains low computation times while allowing superior thermal field resolution and more accurate identification of hot-spots and their location. A method of estimating the equivalent thermal properties of impregnated electrical windings is proposed in order to parameterise the thermal model. The coupled design methodology is employed to study the achievable short-duty performance of the tubular linear actuator topology and establish the feasibility of the alternative electric braking system. A prototype actuator is constructed and tested under short-duty conditions in order to validate the modelling and thermal property estimation methods.
11
Loizou, Andreas, Hong Sheng Qi, and Andrew J. Day. "Analysis of heat partition ratio in vehicle braking processes." Institution of Mechanical Engineers, 2009. http://hdl.handle.net/10454/2834.
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YesAn examination of the heat partition ratio between the friction surfaces of a disc braking system is presented using finite element analysis (FEA). This includes a 2D static analysis of two semi-infinite bodies in contact with and without an interface layer which represents the interface tribo-layer (ITL). An analytical approach with a finite difference solution was used for cross-comparison with the static FE models. Results from the static model have provided the boundary conditions for a 2D dynamic model, where one rectangular block slides on another (fixed) rectangular block. The effects of normal loads and real contact area have also been studied.
Institution of Mechanical Engineers
12
Okeson, Bradley Dwight. "Linear Brass Gliders: Investigation for Magnetic Braking System for a Launching Mechanism." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313511496.
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Ashby, Ryan Michael. "Hardware in the Loop Simulation of a Heavy Truck Braking System and Vehicle Control System Design." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366046155.
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Shepherd, A. C. "Design and performance analysis of an adaptive anti-skid braking system for large aircraft." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/11010.
Full textAbstract:
lt is the author's contention that a brake control
system incorporating the
following two features is suitable for high-performance, robust and adaptive
anti-skid control.
1.
Switching on wheel acceleration with hysteresis,
2. Fixed brake
pressure rate control.
Furthermore, the author contends that such a system can be developed in
the context of
large commercial aircraft development and with regard to;
Minimal
a-priori knowledge of system dynamics,
I No
requirement for on-line system identification.
This thesis documents a
programme of research conducted to examine this
hypothesis in the context of large commercial aircraft, and in conjunction with
Airbus UK at Filton in Bristol. The
physical basis for this method of control is
examined from first
principles, explored in detail through a simulation based
experimental process and is subsequently confirmed as a viable means of
control. This is further
developed into a prototype anti-skid braking control
algorithm which in turn is incorporated into a nominal brake control system
model. A detailed
analysis of the systems performance is then conducted and
reported upon. Finally, conclusions are drawn with respect to the aims and
objectives documented herein and recommendations for further research are
made.
The novel
aspects of this hypothesis and subsequent algorithm
development are as follows, and are to be considered with respect to the
current state-of-the-art in the field:
1. The use of a fixed brake
pressure rate control to isolate the friction
dependent aspects of the system dynamics,
2. The use of a
simple switching element which incorporates hysteresis
such that when combined with l, allows robust -slip gradient
control* to be effected, and
3. The use of brake
system response characteristics to drive an optimal
wheel acceleration demand
signal.
The author believes that these three
aspects of the anti-skid braking
algorithm documented within this thesis combine to provide an effective and
pragmatic solution to the problem, and represent a step forward in the state of-
the-art as is
befitting a research programme of EngD character.
'The
gradient of the -slip (friction coefficient vs. wheel slip ratio) curve is controlled.
15
Shepherd, Andrew C. "Design and performance analysis of an adaptive anti-skid braking system for large aircraft." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/11010.
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lt is the author's contention that a brake control system incorporating the following two features is suitable for high-performance, robust and adaptive anti-skid control. 1. Switching on wheel acceleration with hysteresis, 2. Fixed brake pressure rate control. Furthermore, the author contends that such a system can be developed in the context of large commercial aircraft development and with regard to; Minimal a-priori knowledge of system dynamics, I No requirement for on-line system identification. This thesis documents a programme of research conducted to examine this hypothesis in the context of large commercial aircraft, and in conjunction with Airbus UK at Filton in Bristol. The physical basis for this method of control is examined from first principles, explored in detail through a simulation based experimental process and is subsequently confirmed as a viable means of control. This is further developed into a prototype anti-skid braking control algorithm which in turn is incorporated into a nominal brake control system model. A detailed analysis of the systems performance is then conducted and reported upon. Finally, conclusions are drawn with respect to the aims and objectives documented herein and recommendations for further research are made. The novel aspects of this hypothesis and subsequent algorithm development are as follows, and are to be considered with respect to the current state-of-the-art in the field: 1. The use of a fixed brake pressure rate control to isolate the friction dependent aspects of the system dynamics, 2. The use of a simple switching element which incorporates hysteresis such that when combined with l, allows robust -slip gradient control* to be effected, and 3. The use of brake system response characteristics to drive an optimal wheel acceleration demand signal. The author believes that these three aspects of the anti-skid braking algorithm documented within this thesis combine to provide an effective and pragmatic solution to the problem, and represent a step forward in the state of- the-art as is befitting a research programme of EngD character. 'The gradient of the -slip (friction coefficient vs. wheel slip ratio) curve is controlled.
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Khanse, Karan Rajiv. "Development and Validation of a Tool for In-Plane Antilock Braking System (ABS) Simulations." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56567.
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Automotive and Tire companies spend extensive amounts of time and money to tune their products through prototype testing at dedicated test facilities. This is mainly due to the limitations in the simulation capabilities that exist today. With greater competence in simulation, comes more control over designs in the initial stages, which in turn lowers the demand on the expensive stage of tuning. The work presented, aims at taking today's simulation capabilities a step forward by integrating models that are best developed in different software interfaces. An in-plane rigid ring model is used to understand the transient response of tires to various high frequency events such as Anti-Lock Braking and short wavelength road disturbances. A rule based ABS model performs the high frequency braking operation. The tire and ABS models have been created in the Matlab-Simulink environment. The vehicle model has been developed in CarSim. The models developed in Simulink have been integrated with the vehicle model in CarSim, in the form of a design tool that can be used by tire as well as vehicle designers for further tuning of the vehicle functional performances as they relate to in-line braking scenarios. Outdoor validation tests were performed to obtain data from a vehicle that was measured on a suspension parameter measuring machine (SPMM) in order to complement this design tool. The results of the objective tests performed have been discussed and the correlations and variations with respect to the simulation results have been analyzed.Master of Science
17
Wei, Zhen. "Electro-mechanical braking system development and hybrid electric vehicle power management for urban driving." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49417/.
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As the energy and environment crisis increase severely, developing cleaner and more fuel efficient vehicles have become a research hot spot of automobile industry. In recent years HEV (hybrid electric vehicle) and EV (electric vehicle) are widely considered as two of the most viable solutions to the world’s need for cleaner and more fuel-efficient vehicles. This project aims to further improve the performance and fuel efficiency of EVs/HEVs for real application of urban driving. The thesis can be divided in to two major studies: EMB (Electro-Mechanical Brake) system development and HEV power management, which are two hot topics in the latest researches of EVs/HEVs. The brake system plays an important role in vehicles. As the X-by-wire technology develops, EMB can realize individual control of braking force on each wheel; which makes it very suitable for electrified vehicles. In this thesis a compact design of EMB actuator is proposed. To investigate the control of EMB system, a down scaled EMB test rig has been set up and an EMB motor control system has been developed. In the section of clamping force control of EMB system, in order to achieve fully control of braking force, a low cost sensor less clamping force control method is proposed. It is noted that in real applications of EVs/HEVs the EMB system is normally cooperated with regenerative braking system during braking process, in this thesis the co-operative control of hybrid brake system is investigated as well to improve the braking performance and regenerative braking efficiency. In order to overcome the drawbacks of the conventional gasoline vehicles, HEVs encompass two power sources (internal combustion engine and electric motor) to drive the vehicle. Due to existence of the double power sources, HEVs normally have multiple operation modes. The objective of HEV power management is to find the optimal power distribution on each power source to meet the power requirement with minimum fuel consumption. In this thesis to improve the fuel efficiency and keep the balance of battery SOC (state of charge) simultaneously during urban driving, a revised dynamic programming (DP)-optimized HEV power management control strategy is proposed. The DP algorithm is applied to obtain the optimal engine/motor power distribution and utilized for the design of the fuzzy control strategy. The traditional DP algorithm is modified with the consideration of SOC balance for HEVs. In the analysis of DP simulation results, rules of torque slip behaviors have been found, which are directly utilized in the design of fuzzy control strategy. In order to improve the practicality of the control strategy to meet the diversities of city driving patterns, an urban driving pattern recognition method is presented. To evaluate the control performance, the proposed control strategy is also compared with the conventional rule-based strategy. The simulation results indicate that by adopting the proposed strategy the fuel efficiency of HEV is improved, and the SOC of the battery is kept in balance during different urban driving cycles.
18
Trna, Lukáš. "Brzdový systém formule Student." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230211.
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Describe entire information about design of respective component in Formula (category Student) braking system is object of this thesis. Processing is divided to four main areas. The first one describes basic components in braking system, which goes on analysis of braking system in present used Formula Student Dragon 1. The second one, more spread part, consists of braking system proportioning for Formula Student Dragon 2, respecting pieces of knowledge from first generation Formula. The third part involves design single components of braking system for second generation Formula. This design is supported by measurements and results of calculations. The conclusion of master thesis involves design of caliper model and its FEM analysis.
19
Brůna, Tomáš. "Brzdový systém formule SAE." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228719.
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This work is engaged in the confrontation of the existing braking system of Formula SAE project. From made confrontations is selected the best solution and make his dimension and own construct design. It is verify through analyse of tension and analyse of heat transfer.
20
Meise, Philipp T. "Energy flow in regenerative braking for road vehicles : the analysis of braking and acceleration energy flows in a vehicle with regenerative braking for the prediction of fuel savings and the design of system components for effective capacity utilization." Thesis, University of Bradford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633056.
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21
Patel, Raj Haresh. "Autonomous cars' coordination among legacy vehicles applied to safe braking." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS468.
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Le comportement d'un véhicule autonome peut être affecté par divers facteurs internes tels que défaillance du système de bord, capteur, etc., ou par des facteurs externes tels que manœuvres risquées de la part de voisins immédiats menaçant une collision, des changements brusques de l'état des routes, etc. Cela peut entraîner une défaillance de la manœuvre de coordination, telle que le croisement de plusieurs véhicules à une intersection. Dans de telles situations, lorsque les conditions changent de manière dynamique et que la condition de fonctionnement nominale est violée par des influences internes ou externes, un véhicule autonome doit avoir la capacité d'atteindre la condition de risque minimal. Arrêter le véhicule est l’un des moyens d’atteindre un niveau de risque minimal. La thèse introduit un algorithme d'arrêt sécurisé qui génère des commandes pour véhicules autonomes en tenant compte de la présence de véhicules traditionnels. Un algorithme basé sur un modèle de contrôle prédictif est proposé, qui résiste aux erreurs provenant de la communication, la localisation, la mise en œuvre du contrôle et à la disparité des modèles. Les collisions évitées et la gêne ressentie par le conducteur sont deux paramètres d'évaluation. Les simulations montrent que le contrôleur robuste sous l'influence d'erreurs peut fonctionner aussi bien que le contrôleur non-robuste en l'absence d'erreursThe behaviour of an autonomous vehicle can be impacted by various internal factors like onboard system failure, sensor failure, etc. or by external factors like risky maneuvers by immediate neighbors threatening a collision, sudden change in road conditions, etc. This can result in a failure of coordination maneuver like multi-vehicle intersection clearance. In such situations when conditions dynamically change and the nominal operational condition is violated by internal or external influences, an autonomous vehicle must have the capability to reach the minimal risk condition. Bringing the vehicle to a halt is one of the ways to achieve minimal risk condition. This thesis introduces a safe stop algorithm which generates controls for multiple autonomous vehicles considering the presence of legacy manually driven vehicles on the road. A Model Predictive Control based algorithm is proposed which is robust to errors in communication, localization, control implementation, and model mismatch. Collisions avoided and discomfort faced by the driver are two evaluation parameters. Simulations show that the robust controller under the influence of errors can perform as well as the non-robust controller in the absence of these errors
22
Drabison, John Stephen II. "Experimental Investigation of Judder in a Floating Disc-Caliper Braking System with Focus on Pad Geometry." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276795212.
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Lee, Jia-Jir, and 李佳笈. "Current Control of Regenerative Braking System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/54378370159771670329.
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CHIEH, LI CHIH, and 李志杰. "Study on an Eddy Current Braking System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/10116404780852558328.
Full textAbstract:
碩士國立中興大學
電機工程學系
93
This research implements, analyses and verifies an eddy current braking system.The eddy current braking system includes DC servo motor(edcoder inside)、belt、pulley、shaft、shaft bearing、electromagnet and Aluminium circular disc…etc. Motive power of the eddy current braking system is provided by the DC servo motor，via the belt and the pulley and then put the Aluminium circular disc in motion. DC current generator inputs the electromagnet current to effect the magnetic field and then inductes the eddy current braking torque above the Aluminium circular disc .Then the rotating speed of the disc will be slowdown. Signal measuring and processing depends on DAQ card and LabVIEW of NI company.By way of experiment, we can find that the theory derivation matches the experiment result.
25
謝孝樑. "Robust Control of a Regenerative Braking System." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/61412544084297948119.
Full textAbstract:
碩士國立海洋大學
機械與輪機工程學系
89
Regenerative braking system of electric vehicle are uncertainty plants from control viewpoint. The uncertainties come mainly from mass variation due to loading conditions, system characteristics variations over the entire speed range, and motor parameters. Two control systems are considered. One is the road simulation system and the other is the regenerative braking system. The object of this study is to design robust -optimal controller for the road simulation system. The controllers are implemented using a personal computer and PCL-818L AD/DA data acquisition card. Experimental results match the simulation results quite well and satisfy the robust performance requirements in the range of mass perturbations. All the regenerative energy from the Brushless DC Motor (BLDCM) is stored back to the cells by a boost converter.
26
Chen, Suanzen-Zen, and 陳鉉仁. "Design and Analysis of Regenerative Braking System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/72a34c.
Full textAbstract:
碩士國立臺北科技大學
車輛工程系所
94
For the traditional braking system, it always utilizes mechanical friction method to dissipate kinetic as heat energy, and results in a lot of wasted energy. In order to solve this problem, a regenerative braking system is designed in this thesis. The electric motor is used as a bridge between mechanical and electric energies .To generate electric power for the Ni-MH battery while vehicle is braking. The brake torque of the motor is controlled using a PID controller which decides the duty cycle of PWM. First, a vehicle dynamic simulation model, which included driver, tire, pitch plane, and battery models, is established to represent the dynamic response of the vehicle. The dynamic model can then be used to analyze the electric vehicle system and design the control strategy. Finally, a regenerative braking system platform is established to verify the efficiency of regenerative braking system and proposed control strategy.
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Klaps, J., and Andrew J. Day. "Wheel movement during braking." 2002. http://hdl.handle.net/10454/886.
Full textAbstract:
YesAn experimental study of wheel movement arising from compliance in the front suspension and steering system of a passenger car during braking is presented. Using a Kinematic and Compliance (K&C) test rig, movement of the front wheels and the suspension sub-frame, together with corresponding changes in suspension / steering geometry under simulated braking conditions, were measured and compared with dynamic measurements of the centre points of the front wheels. The resulting knowledge of front wheel deflections has enabled the causes and effects of steering drift during braking to be better understood in the design of front suspension systems for vehicle stability.
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Yang, Shaw-Jing, and 楊紹經. "Dynamic Control Analysis of Eddy Current Braking System." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/58398107629608359951.
Full textAbstract:
碩士國立清華大學
動力機械工程學系
86
The objective of this thesis is to provide an auxiliary braking system, namely eddy current brakes, for the high speed railway vehicles. Due to the reduction of the adhesions between the rail and the wheels are in high speed region, the acceleration and braking forces based on the adhesions are reduced. In order to provide sufficient braking capacity for the high speed vehicles, a thorough analysis based on the Fourier Series for eddy current brakes has been conducted. In the thesis, nonlinear BH magnetic characteristics of the rail have been considered. The results based on the method have been compared and high speed experimentation has been employed for verifying the simulation results. Also, further analysis on the temperature rise on the rail surface has been investigated by numerical simulations. In addition, test results on constant braking force design have been shown in this thesis to illastrate a possible way on controlling the brakes.
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Wu, Meng-Tzong, and 吳孟宗. "Anti-lock Braking System For Unmanned Aerial Vehicle." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/30048103425894589796.
Full textAbstract:
碩士逢甲大學
自動控制工程學系
89
Anti-lock brake system (ABS) is an equipment that can prevent a vehicle out of control from the lock-up of the wheels during braking. Commercial aircraft and fighters generally equip with ABS devices, but they are complicated, expensive and heavy. For Unmanned Aerial Vehicle (UAV), the device should be simple, low-cost and light-weigh. In this thesis, we develop a fuzzy logic based UAV ABS, which includes a simple wheel speed sensor, a flight control computer and a fuzzy controller. The implementation of fuzzy rule base is intended to infer appropriate brake torque and achieve excellent braking performance. Our purpose is to design an efficient strategy for the design of a simple, light-weigh, low-cost and safe ABS for the UAV. We have developed a complete mathematical model describing the UAV landing behavior with the dynamical property of braking, which includes the vehicle dynamics, aerodynamics, tire force model and hydraulic system dynamics. Fuzzy logic control theory is used to design the ABS controller. Based on the software tool Matlab and Simulink, we construct a complete ABS simulation platform. Extensive computer simulations show that the proposed strategy is effective and shown to meet the performance requirement. Keyword：Anti-lock brake system (ABS), Unmanned Aerial Vehicle (UAV), Fuzzy Logic Control
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Chiu, Yung-Tsung, and 邱永聰. "Anti-Skid Braking System for Motorcycle''s Turning." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/9t2z88.
Full textAbstract:
碩士逢甲大學
自動控制工程所
91
The purpose of this research is to establish a useful model of tire''s cornering force of the motorcycle for the design of anti-skid braking control. The model takes into account the dynamics of the motorcycle, the dynamics of the wheel, the dynamics of the hydraulic control system, and the dynamics of the brake mechanism. A fuzzy controller, to control the slip ratio at a desired value 0.2 and to maintain maneuvering capability, is designed to inspect the validation of the model via simulation. Motorcycle''s cornering force value delivered from dynamic is comparative with tire''s cornering force value delivered from tire''s slip angle. It can decide that anti-skid braking system for motorcycle''s turning is good or not.
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陳達享. "Design and analysis of fuzzy anti-lock braking system." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/74458807187555479513.
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Chang, Sheng-Chieh, and 張盛傑. "Driver IC for Emergency Braking Detection and Warning System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16664649271250044754.
Full textAbstract:
碩士國立清華大學
電子工程研究所
98
Recently, traffic safety is an important issue for the governments around the world that also investigate how to minimize the risk of traffic accident. According to NTHSA research, the majority of car crash is rear-end collision. This study provides a system to detect emergency braking and warns the rear vehicle at the same time. This study emphasizes on the circuit system design which includes a comparator, a signal generator, and a LED driver. The designed circuit has been fabricated by TSMC 1P4M 0.35μm CMOS standard process. The emergency signal from g-sensor is detected by comparator. Using signal generator to create a 5Hz oscillation makes LED flash at 5Hz. Finally, LED driver not only driving LED but also providing a high current which lets LED have high brightness to warn rear vehicle.
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Chou, Chi-hung, and 周季弘. "Development of a Magnetic Braking System Using Permanent Magnet." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/73205419256624244489.
Full textAbstract:
碩士淡江大學
航空太空工程學系
90
This research develops a magnetic braking system using permanent magnet. The major tasks include mechanical/structure design, magnetic braking force analysis and design, and moving object supports and controls. The magnetic braking force is computed via the analysis of the mutual coupling between the induced eddy current on the braking material and the moving magnetic field. The experimental tests were conducted to brake a moving object, weighted 282 kg, sliding down vertically from a 310 cm height structure. Good agreement between simulation and experiment results are obtained.
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Wang, yu-chi, and 王毓麒. "The Control And Experiment For Anti-Lock Braking System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/17943084125574656557.
Full textAbstract:
碩士大葉工學院
機械工程研究所
84
This thesis is the research for the special properties of anti- lock braking system and propose the design named anti-lock braking fuzzy controller. Also design another testing platform of anti-lock braking in order to practice the designd controller and make necessary verification and execute the laboratory research of anti-lock braking system. According to the development of theory, we have inferred the mathematicmodels based on the dynamic propert y of braking which include vehicledynamic tire force model and hydraulic system dynamics. Then figures theseout by fuzzy controlling principle and control the solenoid valve of hydraulic braking system through fuzzy inference which may keep the braketorque around the best value and achieve the demand of minimum brakingdistance and best operating control. Through simulink in matlab software,the block diagramof anti-lock braking system is constructed and thecomputerized imitation of anti-lock braking system has provided technicalreference to design the fuzzy controller by real parameters by hard wareequipment. For the development on testing platform, in order to test and understandthe motivated efficiency of anti-lock barking controller, this testingplatform has been designed according to the theory experience and enableus to obtain all laboratory figures and cross-testify them. We may have complete understanding on the operation of anti-lock brakingsystem and judge the situation of controller to make improvement orrectification. It is certified that this fuzzy controller has achievedits efficiency by laboratory result.
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Tsai, Chia-jung, and 蔡嘉榮. "Design and Experiment of Test Platform forNovel Braking System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/34442795416852380092.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
100
ABSTRACT In this study, to discuss the choice of a new brake system for the dynamic response for the simulation of dynamic braking for test platform to build and experiment with the source and the hydraulic brake performance test that is intended to design a set. Pattern signal, in this paper that it is establishing a brake data, the brake system to move the situation to design an analog brake test platform, experimental brake test platform brake, through the brake torque meter, tachometer safety standards as the value of the operation of the vehicle brake system more realistic, as well as the right to verify the validity of the results of a simulation test system component parameters measurement, oil pressure sensor. In this study, depending on the installation of emergency flooded cylinder brake test platform pedal at different speeds brake master braking of the car road conditions for performing the test, simulated, a malfunction of the brake, resulting in brake implementation of a new brake system of the second set of simulations using the heavy foot on the brake pipeline rupture simulation test platform, and the brake pedal, the operation of the brake system. Test results for the dynamic response by the program, monitoring of new brake system, the design of this research platform, ensure that you meet the experimental conditions required by the new brake system, hydraulic brake of immediately you can follow the change.
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Chen, Tzu-Hao, and 陳子豪. "Study of a Anti-Lock Braking System for Scooters." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/38yv79.
Full textAbstract:
碩士國立屏東科技大學
車輛工程系所
105
According to a new regulation of Taiwan, all new factory scooters must be equipped with Anti-Lock Braking System (ABS) or combined brake system (CBS). This regulation was initiated by European Union and is the main trend of the global safety standards for scooters. Currently, most of the ABS products are for hydraulic disc brake system, it is seldom designed for drum brake systems. However, among about 70 million scooter sales around the world every year, about 70% are of middle-low price scooters and are equipped with drum brake either on rear wheel or on both the front and rear wheels. Therefore, this thesis is focused on developing an ABS system for scooter drum brake system. For scooters, besides emergency brake condition, most of brake operations are using rear wheel brake with a force range of no more than 15 kilogram applied to the brake hand lever. Because rear wheel locked up may cause vehicle sideslip and thus loss vehicle directional stability. this thesis is aimed at rear drum brake ABS, hereafter DABS. The DABS is of closed-loop electronic control system. The control module estimates rear wheel slip ratio during braking on-line, when the rear wheel slip ratio is over a specific value, the control module preciously adjusts wire tension of the rear brake to make the ABS control. With this aim, the works in this thesis include mechanism design for ABS actuator, system design, wheel slip ratio estimation, road friction estimation, control algorithm design, numerical simulations, and finally the performance verification experiments. The proposed DABS has been implemented on a 125cc light weight scooter. The test results on emergency brake from 60 Km/hr to stop showed that for the case of braking without ABS control, rear wheel will be locked-up with the slip ratio of 100%, while the case for the DABS applied, the slip ratio was well controlled within 10%~40%, and the resulting deceleration can reach 0.43G, only degrade 0.02G compared with the case for without ABS applied. Furthermore, the effect of the DABS failure has been performed. It was shown that the failure of the DABS has no effect on the efficiency of the original braking systems. Keywords：Anti-Lock Braking System, Vehicle Dynamics, Road Friction Estimation, Slip Ratio Estimation, Sliding Mode Control.
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HUANG, JUN-XUAN, and 黃均軒. "Study on Design and Testing of Intelligent Braking System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/97bxj7.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
107
This research aims to conduct smart design on innovative braking system and is further discussed on experimental platform. Matlab sub-software, Simulink, was initially utilized to conduct logic design and program structure coding, and then the braking system ran through several tests on the computer, verifying the correctness of the program logic and structure before proceeding to physical circuits testing. In the aspect of smart design, Micro-Box was utilized to serve as the main core for the controller of the industrial computer in this research. It ran through simulations of the normal situation when a vehicle hits the brake in order to design the smart system particularly for braking. Upon completion of the system, it simulated transformation in the computer and then was burned into Micro-Box to perform small circuits testing, and the whole process was monitored by Simulink to see if anomaly occurred in the system variation. The tested program entered the final phase and was written into Micro-Box and set as standalong mode in order to apply to test platform and relevant testing for future use of the system on the real vehicle, and which provides us the discussion on difference between simulation and platform for future constructive feedbacks.
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LIN, HUI-EN, and 林暉恩. "Analysis of Tire Normal Force for Motorcycle Braking System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8f6kyv.
Full textAbstract:
碩士國立臺北科技大學
車輛工程系
107
The purpose of this study is to explore the changes of the normal force on front and rear wheels for motorcycle when there are different riders riding on it, and then to develop the distribution strategy of the front and rear wheel braking force. Firstly, by using the closure equation and static equilibrium, this study analyze the movement situation of the motorcycle frame and the change of front and rear wheel load when there are displacements of the front and rear shock absorbers. The actual experiment is used to verify the above analysis results. With this estimation, the brake system can use the distribution of the front and rear axle load as the distribution ratio of the braking force. Finally, the distribution strategy of braking force in the CBS was developed, and it’s effectiveness was confirmed by using the simulation of braking test in the Bikesim software.
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Chia-ChengKu and 古佳正. "A Regenerative Braking System for Interior Permanent Magnet Motor." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cahh35.
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Raschio, Peter J. "Evaluation of dynamically controlled resistive braking for the Pacific Northwest power system." Thesis, 1994. http://hdl.handle.net/1957/35283.
Full textAbstract:
Today's power systems are undergoing dynamic changes in their operation.
The high cost of capital improvements that include new generation and transmission
projects has prompted power system planners to look for other alternatives in dealing
with increased loads and overall system growth. A dynamic braking resistor is a
device that allows for an increased rating of a transmission system's transient stability
limit. This allows increased power flows over existing transmission lines without the
need to build additional transmission facilities.
This thesis investigates the application of dynamically controlled resistive
braking in the Pacific Northwest power system. Specifically, possible control
alternatives, to replace the present dynamic brake control system at Chief Joseph
station, are examined. This examination includes determination of appropriate
locations for control system input, development of control algorithms, development of
computer and laboratory power system models, and testing and recommendations
based upon the developed control algorithms.Graduation date: 1995
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王鵬森. "An Intelligent Customer Complaints Handling Diagnosis System -- Using Braking System as an Example." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/02642422367496260002.
Full textAbstract:
碩士義守大學
管理科學研究所
85
Customer response for your product is the best indicator of the performance of quality control. Any complaint, which represents defection of quality control, usually means loss of the customer''s rights and damage of company''s reputation. Customer''s complaints may be caused by bad product quality, nonconformity of specifiations, or defects of product functions. In this research, an integrated customer complaint handling system, which takes advantage of artifical neural network (ANN) and expert system (ES, is developed for supporting quality workers in the production workshop of automobile braking system to systematically deal with customer complaints and for the further applications in the industry and researches. The aim of the ANN module using General Regression Neural Network (GRNN) in the system is to predict the possible reasons of the problem for quality workers while receiving complatint telephone or fax from customer. With the help of the ANN, the system can perform the earlier diagnosis based on the symptoms provided by the customer and prepare some suggested actions before leaving for handling the abnormal lots of product in the customer side. If the problem can not be handled in time or has never happened before, the ES module can be applied to identify the causes of problem by means of a series of measurement and functional tests, and providing conclusion and suggestions. After that, the results obtained with the support of the ES can be used as training samples of the ANN for improving the accuracy of prediction. With the synergy of the artificial intelligent techniques in the system, the effort of measurement and tests in the domestic factory can be significantly, reduced so that much time and other resources are saved. Furthermore, we believe quality worker quickly and effectively deal with customer complaints and increase the satisfaction of customers. In practive, this prototype system can support quality workers to quickly analyze the rensons of failure from after-sale services and customer complaints in order to find out what should be improved in the future. In addition, this system can be applied as a useful tool to support for re-education and training new quality workers in short period of time.
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Lin, Jhe-Wei, and 林哲偉. "Hybrid Anti-Lock Braking System for Motorcycles Using Magnetorheological Brake." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/8ncbjh.
Full textAbstract:
碩士國立臺北科技大學
車輛工程系所
101
Magneto - rheological fluid (MRF) is a new development of smart materials. It is studied and applied widely in the braking damping systems because of the controllable viscosity changes with applied magnetic field at almost linear relationship, reversible and fast response time and other characteristics. Nowaday, control algorithm using in anti-lock braking system (ABS) is the same common method which is to use on-off control valve. The valve can be controlled by increasing the switching frequency to improve braking performance, but the method is limited by the system itself existing in hydraulic switching valve reaction time and frequency. Therefore, if an MR brake system with fast response time combines to a conventional braking system, It can effectively improve the braking performance and stability. In this thesis, a hybrid ABS braking system using MR brake is proposed, Dynamic simulation and analysis were conducted. Speed estimator used in this study is continually estimated lateral speed which calculates vehicle slip values. Road Condition Estimation is used to obtain the best ideal slip value. ABS control using Self-Organizing Fuzzy controller with two kinds of fuzzy controller. The hybrid ABS brake system is composed of the hydraulic system and the MR brake system. The combination of the two systems was simulated and analyzed by dynamic analysis software for pure MR ABS braking system and hybrid ABS braking system using MR brake. The controller is divided into general fuzzy controller with two kinds of self-organizing fuzzy ABS controller. The results shows that self-organizing fuzzy controller provides high adaptability on the road while braking performance can be improved up to approximately 18%. Hybrid ABS systems using MR brake are divided into three types: fixed-oil -pressured hydraulic system, filter-typed system and switch-valve-typed system. The simulation results of those three systems show that the hybrid ABS system overall performance increased to about 8 % efficiency compared to conventional hydraulic ABS system. This system is expected to be applied for future vehicle.
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Sweed, Emad Mazen. "Design and finite element analysis of formula student braking system." Master's thesis, 2021. http://hdl.handle.net/10198/24728.
Full textAbstract:
The present project focuses on the research and design of a braking system for sports vehicles. The braking system will be included in a vehicle being developed by the IPB Motorsport Team in order to participate in an annual worldwide collegiate design competition called Formula Student. The competition evaluates a Formula style car's engineering, performance, and cost.
Since it was the first vehicle of this style to be designed at IPB, the values were analysed and estimated for the under-design vehicle. A methodology has been developed using the theory of vehicle dynamics to design a braking system capable of meeting the technical requirements of the competition.
Another part of this research included analysing the behaviour of brake rotors made of various materials (Gray Cast Iron, Aluminium Alloy) and Geometry (Drilled, Solid) using Finite Element Analysis (FEA) more precisely the ANSYS software version 21. Static and thermal simulations were conducted for the design.
As a result, a brake system assembly capable of achieving a four-wheel lock is demonstrated. Gray cast iron has superior thermal and static capabilities than aluminium, and the rotor geometry has an effect on the stress distribution.
The simulations proved to be very useful in determining the most suitable brake rotor material and cooling shape for the brake rotors.O presente projeto centra-se na investigação e concepção de um sistema de travagem para veículos desportivos. O sistema de frenagem será incluído em um veículo que está sendo desenvolvido pela IPB Motorsport Team para participar de uma competição universitária anual de design chamada Formula Student. A competição avalia a engenharia, o desempenho e o custo de um carro estilo Fórmula. Por ter sido o primeiro veículo desse estilo a ser projetado no IPB, os valores foram analisados e estimados para o veículo em projeto. Foi desenvolvida uma metodologia a partir da teoria da dinâmica veicular para projetar um sistema de frenagem capaz de atender aos requisitos técnicos da competição. Outra parte desta pesquisa incluiu a análise do comportamento dos rotores dos freios feitos de diversos materiais (Ferro Fundido Cinza, Liga de Alumínio) e da Geometria (Perfurada, Sólida) utilizando a Análise de Elementos Finitos (FEA), mais precisamente o software ANSYS versão 21. Estático e térmico simulações foram realizadas para o projeto. Como resultado, é demonstrado um conjunto de sistema de freio capaz de obter um travamento nas quatro rodas. O ferro fundido cinzento tem capacidades térmicas e estáticas superiores do que o alumínio, e a geometria do rotor tem um efeito na distribuição de tensões. As simulações provaram ser muito úteis para determinar o material do rotor do freio e a forma de refrigeração mais adequados para os rotores do freio.
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Cruz, David Jose Torres. "Design of an innovative car braking system using eddy currents." 2005. http://hdl.handle.net/1828/583.
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SHIVAM, KUMAR, and 庫馬. "Design of a Combined Braking System for Two-Wheeler Vehicles." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/67760941762163364016.
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Wu, Chun-Hsien, and 吳俊賢. "Design and implementation for regenerative braking system with ultra-capacitor." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/7b87c3.
Full textAbstract:
碩士國立虎尾科技大學
機械與機電工程研究所
98
This research develops a hybrid/electric motorcycle regenerative braking system by integrating an ultra-capacitor module, a motor/generator module, and a bidirectional buck–boost DC/DC converter. The main objective of this system is to recycle vehicular kinetic energy in brake/restart process. As a quick reversible energy storage device, the ultra-capacitor can reduce battery size, extending lifespan of battery, and save the energy which is supposed to be abandoned in brake process. The energy-management strategy is executed by the bidirectional DC/DC converter for transforming energy between the power sources in boost and buck operating modes. In order to simultaneously control the current for extending lifespan of battery and keep the voltage within the constraint in the transform processes, an adaptive fuzzy sliding-mode controller (AFSMC) is developed to address this problem. Based on the dependency on current and voltage in the charge/discharge process, the need of differential operation in sliding surface for ultra-capacitor voltage can be released by introducing a new substitute sliding surface which consist of the current and the voltage in ultra-capacitor. Then a SISO fuzzy logic control is designed to control these SIMO systems, whose consequent parameters can be initialized at zero, and then adjusted by using an online parameters tuning algorithm derived from the Lyapunov stability theory. A comparative analysis with experimental results soundly confirmed that the regenerative braking system with ultra-capacitor has better dynamic performance and longer traveling distance while the performance of developed AFSMC is better than those of classical PID controllers.
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Chih, Chang Chun, and 張俊智. "Design and Implementation of the Monitoring System for the Vehicle Dual Braking System Testbench." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/96054801782058874411.
Full textAbstract:
碩士大葉大學
機械與自動化工程學系
100
With the vigorous progress of vehicle technology industry, people pay more attention on the road safety nowadays. Based on the braking system directly relating to the safety of drivers, the relative studies of its dual braking system have comparatively brought up the importance as well. The purpose of this study is to explore the setting of simulating platform of dual braking system as well as the functional response, and to test the hydraulic source of the dual braking system. Its aim is to utilize the function of braking system in designing a braking simulating platform, design a dynamic real time monitoring interface according to the platform built with LabVIEW graphic software, and then discuss the dual braking system of its functional response. LabVIEW graphical control software program the vehicle dual braking system for moving response. And brake simulation test platform, which the simulation of the vehicle walking, each sensor's signal source, and control. The test results indicated that, vehicle dual braking systems program monitoring, for the dynamic response can immediately follow the changes in the brake hydraulic response and actuation.
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Cuderman, Jerry Ferdinand 1966. "Performance of passenger vehicle anti-lock braking system : an experimental study." 2001. http://hdl.handle.net/2152/10328.
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Shie, Jen-Haw, and 謝禎浩. "Study of Taipei Rapid Transit Mucha Line Electric Regenerative Braking System." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/96754207050958145541.
Full textAbstract:
碩士國立成功大學
電機工程學系
86
This thesis is to simulate and study the distinction of rapid transit Mucha line electric regenerative braking based on the skeleton of Taipei rapid transit Mucha line electric regenerative braking system. Since Mucha line regenerative braking system applies the new zero current switching technology and makes use of Hole current sensor circuit, when in braking, switch changes its status as the current across it is nearly zero, so the switching loss is very little, Compared to the traditional regenerative braking, the above system possesses the advantage of switch destruction rate small. Additionally, from the result of experiment in pragmatic simulation of Hong Kong MTRC traditional regenerative braking circuit, the fitness distinction is perceivable, but borken happened almost. Furthermore, this thesis is to make further discussion aiming at rapid transit Mucha line motor control circuit. Lastly, practical plan for ameliorating the above system is proposed.
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Liao, Yu-Wei, and 廖昱維. "Design Software for a Dynamic Test Rig on Bicycle Braking System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/56938692488031387224.
Full textAbstract:
碩士國立交通大學
機械工程系
91
After making a survey for the bicycle test rigs that can be searched nowadays, one can find that there are some references about dynamic test on bicycle braking system. However, discussion the important braking conditions, load-transfer effect, there is few reference to mention about these simulation and the test system. It requires an additional hypothesis or inference to simulate the real braking behavior in the further study. In these conditions, some unknown braking conditions maybe ignored unconsciously. Therefore, an appropriate braking simulation with load-transfer effect will be developed to a better test braking system. The object of this study is to design complete test software, which can work on a new developed dynamic bicycle test rig. It can record real-time braking signals in the testing for the specific functions on bicycle braking system. The whole results of braking behavior by means of analyzing the testing data can be obtained in this study, and expecting to provide this study a reference for further design and safety testing on the bicycle braking system.