Journal articles: 'Traction control'

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Gau, Ally. "Traction Control." Equine Health 2012, no. 8 (November 12, 2012): 18–22. http://dx.doi.org/10.12968/eqhe.2012.1.8.18.

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Md-Tahir, Hafiz, Jumin Zhang, Junfang Xia, Yong Zhou, Hua Zhou, Jun Du, Muhammad Sultan, and Hafiza Mamona. "Experimental Investigation of Traction Power Transfer Indices of Farm-Tractors for Efficient Energy Utilization in Soil Tillage and Cultivation Operations." Agronomy 11, no. 1 (January 17, 2021): 168. http://dx.doi.org/10.3390/agronomy11010168.

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Farm tractors in cultivation consume a big amount of fossil fuels and emit greenhouse gases to the atmosphere. Improving traction performance and power transfer indices of wheeled tractors and field terrain soil with higher traction (pull ability) at optimal travel reduction (TR) can optimize energy utilization. This study compares the traction performance, fuel consumption, and field productivity, of a farm tractor equipped with a new drive wheel “rigid lugged wheel (RLW)” and conventional tire wheel (CTW) in field tillage operations. Tractor with RLW resulted 24.6 kN drawbar pull and 6.6 km.h−1 travel speed at 80% tractive efficiency and 15.6% TR. While with CTW, the drawbar pull and the travel speed were 23.2 kN and 6.0 km h−1 respectively at 68% tractive efficiency and 36.3% TR. The RLW resulted in improved traction performance with similar equipment weight. Tractor with RLW also resulted 220.5% lower TR, 14.8% higher field productivity, and 15.4% lower fuel consumption. RLW can control equipment weight and field traffic intensity with the improved traction performance of wheeled tractors and will make the field operations more energy-efficient and economical. For enhanced field drivability of RLW, further work is required to test for diverse field conditions and differently sized tractors.

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Abu-Hamdeh, Nidal H., and Hamid F. Al-Jalil. "Computer simulation of stability and control of tractor-trailed implement combinations under different operating conditions." Bragantia 63, no. 1 (2004): 149–62. http://dx.doi.org/10.1590/s0006-87052004000100015.

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The mechanics of a tractor-trailer system moving up and down sloping ground under different operating conditions was theoretically simulated. A computer program was developed to analyze the system to predict the effect of both the trailer loading weight and the slope angle on the tractor stability, traction ability, and drawbar loading. The program was used to analyze a tractor-trailer system moving at uniform motion up and downhill. The results of this analysis showed that the tractor becomes unstable when towing a 3750 kg trailer uphill at 28° slope angle. Insufficient traction occurred at slope angles ranging from 15° to 18° corresponding to trailer weight of 3750 to 750 kg. The parallel component of drawbar pull reached a maximum value of 17318 N when the trailer was pushing the tractor downhill at 30° slope angle. The normal component (normal to the tractive surface) showed similar maximum values for both uphill and downhill motions of the system. The use of computer analysis in this study provided a significant improvement in predicting the effect of different parameters on stability and control of tractor-trailer combination on sloping ground.

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TANAKA, Tadao, and Keiji ISODA. "Traction Control System." JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry 35, no. 1 (1992): 116–20. http://dx.doi.org/10.1299/jsmec1988.35.116.

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TANAKA, Tadao, and Keiji ISODA. "Traction control system." Transactions of the Japan Society of Mechanical Engineers Series C 57, no. 534 (1991): 614–18. http://dx.doi.org/10.1299/kikaic.57.614.

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Nakatani, Fumihiko, Shigeyuki Morita, and Takeshi Takiyama. "Adaptive Traction Control." Transactions of the Japan Society of Mechanical Engineers Series C 60, no. 580 (1994): 4190–94. http://dx.doi.org/10.1299/kikaic.60.4190.

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Savos’kin, A. N., and N. D. Shilin. "Analysis of wheel pairs slip control of electric freight locomotive with asynchronous traction motors." RUSSIAN RAILWAY SCIENCE JOURNAL 81, no. 3 (September 6, 2022): 230–39. http://dx.doi.org/10.21780/2223-9731-2022-81-3-230-239.

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Introduction. Every year, the amount of electric rolling stock with asynchronous traction motors is continuously increasing on the Russian railway network, since such traction drives have a number of advantages over drives with DC motors. One of the problems associated with the introduction of asynchronous motors and an increase in the mass of trains is the implementation of the maximum traction force by an electric locomotive at the threshold in terms of wheel – rail adhesion. Timely recognition of excessive slip of wheel pairs is the most important indicator of the efficiency of the traction drive in realising the maximum traction properties of the electric locomotive at all axles.Materials and methods. The article reflects the results of the study of slip of electric locomotive wheel pairs with asynchronous traction motors and axial control of the traction force, obtained during experimental runs on a railway section under various adhesion conditions. The article presents a technique for studying the wheel pair adhesion failure of electric locomotives with asynchronous traction motors.Results. During the comparison of the obtained experimental results with the calculated parameters by the O. Polach mathematical model, an updated range of the relative slip of wheel pairs is given, in which the electric locomotive control system could realise the maximum tractive effort. Exceeding this range will lead to increased wear of wheel pairs without increasing traction properties.Discussion and conclusion. It is advisable to use the results of the study in the future when developing systems for controlling the tractive effort at the limit of adhesion and systems for controlling the slip of wheel pairs of electric freight locomotives with asynchronous traction motors.

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Gorodetskiy, K. I., V. V. Serebryakov, and A. M. Lavlinskiy. "Determination of traction coefficient of driving wheels of the MTZ-82 tractor." Traktory i sel hozmashiny 83, no. 12 (December 15, 2016): 16–18. http://dx.doi.org/10.17816/0321-4443-66249.

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There are various ways to control the value of normal responses of surface under tractor movers. One of them is to regulate the height of hitch point and the angle of drawbar power. The advantage of this method is that the necessary conditions are created for the automatic control of position of the center of pressure, which ensures the optimization of technical and economic indices of machine-tractor unit operation. To verify this method, it is necessary to carry out the tests determining the parameters of tractor operation, including the traction coefficient of driving wheels. Two variants of its determination are proposed: the towing of tractor with locked driving wheels and the drawbar tests. In both cases, the tractive effort at drawbar is applied at an angle. As a result of drawbar tests, an experimental tractive characteristic of tractor will also be obtained. In preliminary calculations, the weight distribution along the axes is determined depending on the value and the angle of drawbar power. The weight change on the rear axle is more intense than on the front one. It is necessary to use ballast weights on the tractor rear to compensate its unloading. As for tractors and agricultural implements under design, it is necessary to choose the rational component layout and design taking into account the weight redistribution during aggregation. The pre-calculated verification confirms the possibility of use of tractor towing in reverse gear with locked wheels to determine the traction coefficient of driving wheels. The applying of drawbar power at an angle allows to increase or decrease the responses of bearing surface on tractor movers during a particular operation and therefore has an advantage over conventional ballasting at the front of tractor. In combination with the ability to change the back tipping moment, this allows to optimize the traction characteristics of tractors.

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Liudvinavičius, Lionginas, Leonas Povilas Lingaitis, Stasys Dailydka, and Virgilijus Jastremskas. "THE ASPECT OF VECTOR CONTROL USING THE ASYNCHRONOUS TRACTION MOTOR IN LOCOMOTIVES." TRANSPORT 24, no. 4 (December 31, 2009): 318–24. http://dx.doi.org/10.3846/1648-4142.2009.24.318-324.

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The article examines curves controlling asynchronous traction motors increasingly used in locomotive electric drives the main task of which is to create a tractive effort‐speed curve of an ideal locomotive Fk = f(v), including a hyperbolic area the curve of which will create conditions showing that energy created by the diesel engine of diesel locomotives (electric locomotives and in case of electric trains, electricity taken from the contact network) over the entire range of locomotive speed is turned into efficient work. Mechanical power on wheel sets is constant Pk = Fkv = const, the power of the diesel engine is fully used over the entire range of locomotive speed. Tractive effort‐speed curve Fk(v) shows the dependency of locomotive traction power Fk on movement speed v. The article presents theoretical and practical aspects relevant to creating the structure of locomotive electric drive and selecting optimal control that is especially relevant to creating the structure of locomotive electric drive using ATM (asynchronous traction motor) that gains special popularity in traction rolling stock replacing DC traction motors having low reliability. __e frequency modes of asynchronous motor speed regulation are examined. To control ATM, the authors suggest the method of vector control presenting the structural schemes of a locomotive with ATM and control algorithm.

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Antoshchenkov, Roman, Ivan Halych, Аnton Nykyforov, Halyna Cherevatenko, Ivan Chyzhykov, Serhii Sushko, Nataliia Ponomarenko, Sergey Diundik, and Ivan Tsebriuk. "Determining the influence of geometric parameters of the traction-transportation vehicle's frame on its tractive capacity and energy indicators." Eastern-European Journal of Enterprise Technologies 2, no. 7 (116) (April 28, 2022): 60–67. http://dx.doi.org/10.15587/1729-4061.2022.254688.

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This paper reports results of studying the influence of geometrical parameters of the frame in a traction-transportation vehicle on its traction and energy indicators. A method for estimating the influence of geometrical parameters of the frame in a traction-transportation vehicle on its traction and energy indicators has been substantiated, based on the traction calculation of the tractor and taking into consideration the change in the distance from the hinge of the traction-transportation vehicle to the front and rear drive axles. The method makes it possible to determine the normal reactions, tangent thrust forces, and traction power on the wheels of the machine. The method reported here enables defining the optimal geometric parameters for improving the traction-adhesion and fuel-economic indicators of the traction-transportation vehicle. It was theoretically established that the normal reactions on the front wheels of the studied traction-transportation vehicle are 27,800 N and exceed by 1.95 times the normal reactions on the rear wheels of 14,200 N. This is due to the fact that the distance from the hinge to the corresponding axles of the wheels is 1.89 m and 0.97 m. Increasing the distance from the hinge to the axle of the rear wheels to 1.17 m produces a positive effect on improving the tractive performance of the traction-transportation vehicle. There is an increase in the tractive power on rear wheels to 24.39 kW. The experimental study of the traction-transportation vehicle was performed using an all-wheel-drive machine with a hinge-connected frame as an example. The maximum traction power is 121 kW, which is achieved at a speed of 12 km/h, traction efficiency of 0.68, and a thrust force per hook of 30.2 kN. The difference between the results obtained theoretically and experimentally is 8 %. Applying the method could make it possible to provide designers and manufacturers with recommendations for the construction and improvement of a traction-transportation vehicle, to improve traction and adhesion properties, and reduce the anthropogenic impact on the soil

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Kuntanapreeda, Suwat. "Traction Control of Electric Vehicles Using Sliding-Mode Controller with Tractive Force Observer." International Journal of Vehicular Technology 2014 (December 21, 2014): 1–9. http://dx.doi.org/10.1155/2014/829097.

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Traction control is an important element in modern vehicles to enhance drive efficiency, safety, and stability. Traction is produced by friction between tire and road, which is a nonlinear function of wheel slip. In this paper, a sliding-mode control approach is used to design a robust traction controller. The control objective is to operate vehicles such that a desired wheel slip ratio is achieved. A nonlinearity observer is employed to estimate tire tractive forces, which are used in the control law. Simulation and experimental results have illustrated the success of the proposed observer-based controller.

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Yan, Xianghai, Liyou Xu, and Yuan Wang. "The Loading Control Strategy of the Mobile Dynamometer Vehicle Based on Neural Network PID." Mathematical Problems in Engineering 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/5658983.

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To solve the problems of low loading precision, slow response speed, and poor adaptive ability of a mobile dynamometer in a tractor traction test, a PID control strategy based on a radial basis function neural network with self-learning and adaptive ability is proposed. The mathematical model of the loading system is established, the algorithm of adaptive control is described, and the loading control method is simulated with MATLAB software. The system, which uses the NN-PID (neural network PID) control strategy, is used to test a YTO-MF554 tractor. Then, the proposed control strategy is validated. Results show that when the traction increases from 0 to 10 kN, the response time of the test system is 1.5 s, the average traction force in the stability range is 10.13 kN, and the maximum relative error of traction force is 2.2%. This control strategy can improve the response speed and steady-state accuracy and enhance the adaptive ability of the mobile dynamometer vehicle loading system. This study provides a reference for designing the adaptive controller of the mobile dynamometer vehicle loading system.

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Goolak, Sergey, Viktor Tkachenko, Svitlana Sapronova, Vaidas Lukoševičius, Robertas Keršys, Rolandas Makaras, Artūras Keršys, and Borys Liubarskyi. "Synthesis of the Current Controller of the Vector Control System for Asynchronous Traction Drive of Electric Locomotives." Energies 15, no. 7 (March 24, 2022): 2374. http://dx.doi.org/10.3390/en15072374.

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This paper deals with the analysis of the operating conditions of traction drives of the electric locomotives with asynchronous traction motors. The process of change of the catenary system voltage was found to have a stochastic character. The method of current controller synthesis based on the Wiener–Hopf equation was proposed to enable efficient performance of the traction drive control system under the condition of the stochastic nature of the catenary system voltage and the presence of interferences, when measuring the stator current values of the tractor motor. Performance simulation of the proposed current controller and the current controller used in the existing vector control systems of the traction drives used in the electric locomotives was implemented. The results of the performance simulation of the proposed current controller were compared with the performance of the current controller in existing vector control systems of the traction drives. The results are applicable to the design of vector control systems of traction drives in electric locomotives and to the study of the influence of performance of electric traction drives in electric locomotives on the quality indicators of the power supplied by the traction power supply system under the actual operating conditions of the locomotive.

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Tan, Han-Shue, and Yuen-Kwok Chin. "Vehicle Traction Control: Variable-Structure Control Approach." Journal of Dynamic Systems, Measurement, and Control 113, no. 2 (June 1, 1991): 223–30. http://dx.doi.org/10.1115/1.2896369.

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A longitudinal one-wheel vehicle model is described for both anti-lock braking and anti-span acceleration. Based on this vehicle model, sufficient conditions for applying sliding-mode control to vehicle traction are derived via Lyapunov Stability Theory. With the understanding of these sufficient conditions, control laws are designed to control vehicle traction. Both the sufficient conditions and the control laws are verified using computer simulations.

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Young, Jieh Shian, Yu Bang Lin, Kuan Jie Chen, and Po Ting Chen. "Gain-Scheduled Control Approach by Logarithm Transformation for Electrical Vehicle Traction Force Control." Applied Mechanics and Materials 619 (August 2014): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.619.283.

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This paper proposes an approach by logarithm to evaluating the electrical vehicle traction force control directly instead of the slip ratio measurements. Utilizing the built character database of the driven motor, or so-called current-RPM-torque database, a gain-scheduled approach by logarithm transformation is developed to provide the appropriate traction force while one traction wheel of the vehicle is traveling into different road surface. An illustrated simulation with a scenario close to real situation is also given to show the feasibility to evaluate and control the traction force through the database of the motor.

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Hu, Jian Jun, Zheng Bin He, Peng Ge, and Da Tong Qin. "Research on Control Strategy of Traction Control for Four Wheel Drive Vehicle." Advanced Materials Research 230-232 (May 2011): 1242–49. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1242.

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In order to improve the performance of four wheel driver vehicle, structural characteristics of inter-axle torque distribution with planetary gear are analyzed, and a dynamic model of four wheel drive vehicle is established. A synthetic control strategy was proposed to achieve the engine throttle control, inter-axle torque distribution control and drive wheel brake control. Traction control system based on fuzzy logic control is designed. The simulation of traction control on split-µ road and low-µ road are carried out. The results show that, the traction control system for four wheel drive vehicle based on fuzzy control can prevent excessive slip of driving wheels, and vehicle traction property and dynamic performance are improved obviously.

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Cardinale, Pascal, Camillo D'Angelo, and Massimo Conti. "Traction Control System for Motorcycles." EURASIP Journal on Embedded Systems 2009 (2009): 1–10. http://dx.doi.org/10.1155/2009/161373.

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Gessl, C., M. Glasl, and A. Weinmann. "Adhesion control in railroad traction." e & i Elektrotechnik und Informationstechnik 121, no. 7-8 (July 2004): 263–67. http://dx.doi.org/10.1007/bf03055374.

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Nguyen Quang Thieu and V. V. Markov. "Rational control laws asynchronous electric traction." Izvestiya MGTU MAMI 5, no. 1 (January 10, 2011): 70–76. http://dx.doi.org/10.17816/2074-0530-69863.

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The paper considers the optimal control laws for asynchronous traction electric motors to minimize various types of losses, minimize consumption of active and reactive power, maximum overload capacity. The authors established that the joint management of the maximum torque and minimum total losses in the motor is most efficient traction control law for asynchronous traction electric motors.

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Opas, Michal. "Cellular adhesiveness, contractility, and traction: stick, grip, and slip control." Biochemistry and Cell Biology 73, no. 7-8 (July 1, 1995): 311–16. http://dx.doi.org/10.1139/o95-039.

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Translocation of cells over solid substrata depends on generation of motive force, in crawling tissue cells, brought about by regulated contractility of intracellular actomyosin. Intracellular contractile machinery has a direct, structural connection to the cell surface. Hence, regulated adhesiveness of the cell surface provides a mechanism whereby a cell can fine tune the extent of tractional forces that are necessary for effective translocation. Cells are able to control adhesiveness of surfaces (stick), contractility (grip), and the extent of traction exerted on the substratum (slip). Here, I discuss several aspects of local (subcellular) regulation of adhesiveness and contractility and speculate on how cells, given a choice of the substratum, decide on how and where to apply traction.Key words: cell adhesion, focal contacts, cell motility, traction, cytomechanics.

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Shipilevskiy, G. B., and G. V. Novikov. "Structure and dynamic of control of tractor electric drive." Izvestiya MGTU MAMI 7, no. 1-1 (January 10, 2013): 254–62. http://dx.doi.org/10.17816/2074-0530-68385.

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The authors consider the characteristics of operation regimes and control of tractors with electric drives taking into account dynamic properties of controlled objects and requirements to its quality. Objects are the traction drive, including a turn of a tracked tractor, drives of PTO and hydraulic system pumps, and the “engine-generator” system.

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Ovsyannikov, E. M., B. A. Ivobotenko, V. M. Yurkevich, and E. M. Koshelyev. "Direct torque control of asynchronous traction motor." Izvestiya MGTU MAMI 7, no. 2-1 (January 20, 2013): 188–94. http://dx.doi.org/10.17816/2074-0530-68300.

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This paper proposes a new system of direct torque control of asynchronous traction motor with space vector modulation of voltage supply. The results of the simulation of traction asynchronous traction motor show advantages of the developed control system: simplicity of implementation, high dynamic performance and small fluctuations of the electromagnetic torque.

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Lingaitis, Leonas Povilas, and Lionginas Liudvinavičius. "ELECTRIC DRIVES OF TRACTION ROLLING STOCKS WITH AC MOTORS." TRANSPORT 21, no. 3 (September 30, 2006): 223–29. http://dx.doi.org/10.3846/16484142.2006.9638070.

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The paper considers the variation of circuit design of the electric drives in traction rolling stocks when traditional DC electric machines are replaced with AC electric machines. Simplified circuit diagrams of the electric drives using electric machines of non‐commutator type are offered. Operational defects of DC traction engines are weighed against some positive characteristics of direct current series excitation in traction engines, determining their extensive use in the electric drives of traction rolling stocks. However, the rapid development of semiconductor devices, e.g. thyristors and IGBT transistors, led to the creation of a great variety of semiconductor inverters. This made it possible to develop an autonomous three‐phase power supply system for diesel locomotives and algorithms for the AC traction motors and to obtain engine characteristics matching the tractive force by using voltage frequency and current inverters. A mathematical justification of the engine torque and tractive force control as well as its particular characteristics is provided. The graphs demonstrating the particular ways of changing the electrical parameters of an asynchronous motor with a squirrel‐cage rotor are also presented.

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Guo, Hua, and Sheng Wen Yu. "Research and Design of Automatic Traction Cutting System for Aluminum Profile Production Based on ARM." Applied Mechanics and Materials 464 (November 2013): 298–303. http://dx.doi.org/10.4028/www.scientific.net/amm.464.298.

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This paper analyzes the technical requirements for traction cutting in aluminum profile production, established a double tractor motion model, and according to the model, designed a traction control system based on ARM and wireless communication technology, designed the hardware circuit, write the corresponding control program and defined the protocol for wireless communication, so that the system has good compatibility, the system is fully implemented dual tractor motion model, the whole system has been tested in an aluminum profile factory, the experiment proved that the system is fully meet the requirements of the factory. And the system has the following advantages: inexpensive, simple structure, stable performance and good application prospect.

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Zhao, Jian, Jin Zhang, and Bing Zhu. "The Sliding Mode Control for Traction Control System Based on Variable Optimal Slip Ratio." Applied Mechanics and Materials 380-384 (August 2013): 485–90. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.485.

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In this paper, the concept of intelligent tire and road surface information measurement methods are introduced, and the sliding mode algorithm for traction control system based on intelligent tire is proposed. By applying braking torque onto the driving wheels, the slip rates are adjusted to maintain within the optimal region on different road surface, and the optimal longitudinal traction is achieved. According to the simulation results on the CARSIM and MATLAB co-simulation platform of several working conditions, the TCS based on sliding mode control method improves the traction performance on different road surface effectively.

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Tola, A. F., A. M. Sedara, O. B. Olatunde, and A. A. Babalola. "Effect of soil moisture content, dynamic load and wheel slippage in measuring traction in an indoor traction bed." Poljoprivredna tehnika 46, no. 1 (2021): 22–30. http://dx.doi.org/10.5937/poljteh2101022t.

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A study was conducted to determine the effect of soil moisture content, dynamic load and wheel slippage in measuring traction. A single wheel test rig was developed to enable fundamental research on traction studies on tropical soil at the department of Agricultural and Environmental Engineering of Federal University of Technology, Akure. This facility consists of a moving carriage with a trolley that moves in either forward or reverse directions on rails well above a soil bin powered by 2.2 kW, three phase induction motor. The present facility set up was able to operate in either towing test mode for tire motion resistance studies or driving test mode for tire net traction and tractive efficiency studies. The test tire on the moving carriage was powered to rotate by a motor with additional pull provided by a cable-pulley mechanism connected to a tower with hanging dead weights. All controls on the moving carriage were activated from the main control console. The developed facility was successfully tested to determine tractive efficiency for narrow wheels at a particular inflation pressure on clay soil. The single wheel test rig facility worked well and the research indicates that wheel load, wheel slippage, soil moisture content and inflation pressure has great effect on traction efficiency. Traction efficiency decreased as the wheel load and wheel slippage increased. The developed single wheel testing facility can perform traction tests in controlled soil conditions to study the effect of soil, tire and moisture parameters on the performance of the system.

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Song, Jae-Bok, and Kyung-Seok Byun. "Throttle actuator control system for vehicle traction control." Mechatronics 9, no. 5 (August 1999): 477–95. http://dx.doi.org/10.1016/s0957-4158(99)00010-0.

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Gokhale, S. D., Sourabh A. D, Omkar C. K, Prathamesh D. K, and Tanmay J. Y. "Pneumatic Cervical Traction Machine with Monitor and Control." International Journal for Research in Applied Science and Engineering Technology 11, no. 1 (January 31, 2023): 284–86. http://dx.doi.org/10.22214/ijraset.2023.48473.

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Abstract: The practice of spinal traction goes back to the fourth century BC, where Hippocrates first described it as a treatment for kyphosis. It was subsequently implemented in other spinal pathologies including cervical pain and myelopathy. In the 1600s, the Germans employed cervical traction in their medical practice, as an adjunct to open reduction of cervical dislocations, and fractures. In 1929, the Halter device was introduced for the reduction of cervical injuries; then several other devices followed to ensure more efficient traction. To date, there is no accurate description of the mechanism of relief provided by cervical traction. The theory behind its efficiency emphasizes the widening of the intervertebral foramen upon traction, with separation of the facet joint. This will relieve the sustained pressure on the nerve roots, and hence alleviate symptoms of radiculopathy. Other theories suggest that relaxation, and is not involved in intervertebral separation.

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Kirchner, William, and Steve Southward. "Anthropomimetic Traction Control: Quarter Car Model." SAE International Journal of Commercial Vehicles 4, no. 1 (September 13, 2011): 127–34. http://dx.doi.org/10.4271/2011-01-2178.

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Burkov, A. T., O. S. Valinsky, A. M. Evstaf’ev, A. S. Maznev, and A. V. Tretyakov. "Modern Locomotive Traction Drive Control Systems." Russian Electrical Engineering 90, no. 10 (October 2019): 692–95. http://dx.doi.org/10.3103/s106837121910002x.

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Kim, S. Y. "Traction Control with Brake Pressure Estimation." Journal of The Korean Society for Fluid Power & Construction Equipments 10, no. 3 (September 1, 2013): 1–6. http://dx.doi.org/10.7839/ksfc.2013.10.3.001.

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Dincel, Emre, Handan Nak, Şirin Akkaya, Mehmet Canevi, İlhan Mutlu, and M. Turan Söylemez. "Robust Control of Railway Traction System." IFAC-PapersOnLine 51, no. 25 (2018): 171–77. http://dx.doi.org/10.1016/j.ifacol.2018.11.100.

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Lee, M. Y., M. K. Wong, F. T. Tang, W. H. Chang, and W. K. Chiou. "Design and Assessment of an Adaptive Intermittent Cervical Traction Modality With EMG Biofeedback." Journal of Biomechanical Engineering 118, no. 4 (November 1, 1996): 597–600. http://dx.doi.org/10.1115/1.2796050.

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An intermittent cervical traction modality with closed-loop traction force control based on EMG biofeedback was developed and used for clinical study. This system consists of a EMG scanner, on-line self-adjusted traction force controller, audio/video alarm system, real time therapeutic status display, computer interface hardware, and control software. Twenty-four subjects with diagnosed cervical radiculopathy and muscle spasm symptom who were randomly divided into two groups served as subjects in this study. The control and experimental groups were treated with conventional open loop and new EMG biofeedback closed loop traction control protocols respectively. The results of this study indicate that the average reductions in paraspinal EMG signal during traction after 7 weeks treatment for experimental and control groups were 71 and 50 percent, respectively (p < 0.001). These results not only support the clinical use of intermittent, sitting traction to produce cervical paraspinal muscle relaxation, but also revealed that the average myoelectric activity of cervical paraspinal muscle during traction was reduced as traction force increased over the 7-week duration of traction treatment. Through EMG biofeedback traction force control, muscle injury, neck soreness, or pain after traction may be avoided.

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FUCHS, Robert, and Tsutomu TAMURA. "TD-04 CONTROL FLEXIBILITY IN FULL TOROIDAL VARIATOR POWERTRAINS(TRACTION DRIVES)." Proceedings of the JSME international conference on motion and power transmissions 2009 (2009): 666–71. http://dx.doi.org/10.1299/jsmeimpt.2009.666.

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Ковалев, Роман, Roman Kovalev, Алексей Тарасов, Aleksey Tarasov, Галина Федяева, Galina Fedyaeva, Татьяна Сморудова, and Tatyana Smorudova. "Control of traction and braking hybrid shunting locomotive with asynchronous traction motors." Bulletin of Bryansk state technical university 2014, no. 3 (September 30, 2014): 89–92. http://dx.doi.org/10.12737/23227.

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Principles of the management system asynchronous traction drive hybrid shunting locomotive at the limit of adhesion of the wheels and rails in modes of traction and electrical braking and procedures for the development of complex Electromechanical model of the locomotive, the results of the simulation of the dynamics of the acceleration of the locomotive when the realization of the ultimate traction.

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Fanigliulo, Roberto, Marcello Biocca, Renato Grilli, Laura Fornaciari, Pietro Gallo, Stefano Benigni, Paolo Mattei, and Daniele Pochi. "Assessment of the Performance of Agricultural Tires Using a Mobile Test Bench." Agriculture 13, no. 1 (December 28, 2022): 87. http://dx.doi.org/10.3390/agriculture13010087.

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The performance of agricultural tires varies with the characteristics of both the terrain and the tractors on which they are mounted, which differently affect the rolling resistance, the traction capacity, and the slip. To reduce the variability of test conditions, CREA developed an original mobile test (MTB) bench which consists of a dynamometric single axle trailer pulled by a tractor and can be used both in traction performance tests (driving wheels) and in rolling resistance tests (driven wheels). A control system alternatively operates the adjustment of traction force or slip, so that each test is performed maintaining constant the desired values. The MTB underwent tests under different conditions (type of surface, pre-set values of force of traction and slip) aimed at verifying its accuracy and reliability. In a final test, two pairs of identical new tires were simultaneously mounted on the MTB and on the rear axle of the 2WD tractor that pulled it, to discover information on the different interactions occurring, under the same traction conditions, between the soil surface and each pair of tires, with reference to the relationship between the slips and the load transfers observed on the MTB and on the tractor rear axle. The results evidenced the capability of the MTB to guarantee repeatable test conditions, including field conditions, allowing comparison among the performance of different tires.

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Liu, Jianhua, Rui Nie, and Zheshu Li. "Multimotors Coordination Control Method for Consistent Total Traction Torque of Electric Locomotives." Journal of Advanced Transportation 2020 (September 1, 2020): 1–11. http://dx.doi.org/10.1155/2020/2092463.

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Multimotors traction is a common driving mode for electric locomotives. The complexity and variability of the operating environment often cause difficulties for one or some traction motors to output the distributed traction torque, which requires the redistribution of the torque output of multimotors to maintain the total traction torque of all motors at a given constant. To this end, a multimotors coordination control method was proposed for consistent total traction torque of electric locomotives. Through this approach, a traction torque-coordinated control structure was constructed on the basis of energy minimisation with an optimal dynamic adjustment mode. The sliding mode tracking control was developed for each independent motor to improve its dynamic response performance. A simulation verification of motors fault types in two different cases was conducted. The results showed that the proposed method could track the total traction torque in a short time, and the system fluctuations in independent motor coordination process were very small.

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Pevzner, Victor, Uriy Romen, and Kirill Shapetko. "Control of energy aspects of track and rolling stock interaction." MATEC Web of Conferences 239 (2018): 01044. http://dx.doi.org/10.1051/matecconf/201823901044.

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The paper analyses international practices of energy saving for train traction. It describes methods that allow decrease of power consumption. Russian practices of energy consumption for train traction are reviewed, as well as methods for determining the power consumption related to condition of track layout geometry. Best practices of evaluation of impact of profile elevation unevenness to the train traction energy consumption are presented. The calculations that allow matching the data on track geometry before and after track maintenance works are performed, and the convictions concerning cost reduction for train traction energy saving are developed.

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Kuntanapreeda, Suwat. "Super-twisting sliding-mode traction control of vehicles with tractive force observer." Control Engineering Practice 38 (May 2015): 26–36. http://dx.doi.org/10.1016/j.conengprac.2015.01.004.

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Kholodilin, I. Yu, A. V. Korzhov, M. A. Grigoriev, Yu I. Khokhlov, and N. V. Savosteenko. "Highly efficient electric drive with vision system for traction applications in heavy tracked vehicles." Omsk Scientific Bulletin, no. 180 (2021): 41–47. http://dx.doi.org/10.25206/1813-8225-2021-180-41-47.

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A new type of electric motor as a traction drive DET400 based on a field regulated reluctance machine (FRRM) provides high energy efficiency and high specific torque. A comparison is made between FRRM and various types of traction electric drives. The issues of designing the FRRM are considered, the geometric parameters of the electric machine are optimized to achieve the maximum specific indicators. To expand the functionality and ensure operational safety, it is proposed to introduce computer vision into the electronic control system. As a result, the FRRM is designed for traction applications based on the real requirements of a Russian-made crawler tractor.

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Sahbani, Abdelaziz, and . "Two-Wheel Traction Control for Electric Vehicles." International Journal of Engineering & Technology 7, no. 3.13 (July 27, 2018): 22. http://dx.doi.org/10.14419/ijet.v7i3.13.16317.

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This paper deals with a detailed dynamic design of traction control strategies based on fuzzy logic controller. The proposed system is motorized by two independent DC motors associated with two static DC converters and an electrical differential. An approach to both longitudinal and lateral controls of two wheels is described. In fact, by using electric motors, it is possible to have a torque control in each wheel drive, enabling the implementation of a traction control. Consequently, the stability and the safety of the vehicle will be improved. Obtained simulation results confirm the efficiency of the proposed controller.

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Börjesson, Stefan, Tomas Forsberg, Jonas Fredriksson, Bengt Jacobson, and Jonas Sjöberg. "Sliding Mode Control for Traction Control by Brake Intervention." IFAC Proceedings Volumes 37, no. 22 (April 2004): 607–12. http://dx.doi.org/10.1016/s1474-6670(17)30410-x.

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Zou, Z., Y. Zhang, X. Zhang, and W. Tobler. "Modeling and Simulation of Traction Drive Dynamics and Control." Journal of Mechanical Design 123, no. 4 (October 1, 2000): 556–61. http://dx.doi.org/10.1115/1.1402128.

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This paper presents an analytical model for the simulation of traction drive dynamics and control in ratio change processes. The model systematically incorporates the formulations on the kinematics, dynamics and control characteristics of traction drives. In the model, the motion parameters of traction drive components are coupled to CVT inputs and outputs, torque losses, as well as ratio variations. The characteristics of a dual-feedback ratio control system are formulated in Laplace transform and integrated into the overall CVT system. The model is implemented in Matlab/Simulink block diagrams and is capable of predicting traction drive performances under various ratio change conditions. The effectiveness of the model is illustrated in a numerical example by the comparison between the simulation and experimental data on key CVT performance parameters.

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Uteshevs, Igors, and Anatoly Levchenkov. "Modeling of overheat process control of electric motor." Scientific Journal of Riga Technical University. Power and Electrical Engineering 25, no. 25 (January 1, 2009): 61–64. http://dx.doi.org/10.2478/v10144-009-0013-3.

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Modeling of overheat process control of electric motorThe paper presents the research of heating electric traction motor, the temperature dependence of the load current and control impact. The process of heat in heating electric traction motor is given.

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CHUDAKOV, Alexander I., Valery O. IVASHCHENKO, Alexey P. ZELENCHENKO, and Nikolay V. LYSOV. "Optimization of control systems for suburban trains." Proceedings of Petersburg Transport University 2021, no. 4 (December 2021): 499–506. http://dx.doi.org/10.20295/1815-588x-2021-4-499-506.

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Objective: The use of pulse conversion of electricity on direct-current traction rolling stock is discussed. Methods: A variant of the system for regulating the operating modes of traction motors of suburban electric trains using a pulse converter based on insulated gate bipolar transistors is described. (IGBT). Results: The proposed impulse control system is presented as a possible option for the modernization of the applied control systems, which makes it possible to improve the traction and energy indicators of suburban electric trains. The advantages of pulse converters based on IGBTs are shown in comparison with converters based on one- and two-operation thyristors. A simplifi ed electrical diagram of the power circuit of a motor car with a pulse converter is presented, a description of the operation of the power circuit in the traction mode and in the modes of rheostatic and regenerative braking is given. Practical importance: The presented results of the technical and economic comparison of the control systems of the ED4M electric train with a Современные технологии – транспорту 505 ISSN 1815-588Х. Известия ПГУПС 2021/4 contactor-rheostat control system and an electric train with regulation of the operating modes of traction electric motors by a pulse converter based on IGBT prove the best energy effi ciency of an electric train equipped with a pulse control system

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Yang, Woo Joo, and Young Bae Kim. "Traction Control for a Fuel Cell Hybrid Vehicle (FCHV)." Applied Mechanics and Materials 187 (June 2012): 286–92. http://dx.doi.org/10.4028/www.scientific.net/amm.187.286.

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Traction control for the proton exchange membrane (PEM) fuel cell hybrid vehicle is studied. The traction control denotes the anti-slipping action when the vehicle meets sudden road surface friction changes. Slip ratio is utilized to analyze the slipping action, and optimum value is chosen for controlling the motor speed to prevent the slip. A one-dimensional longitudinal model of a fuel cell vehicle is constructed to prove the traction control effectiveness. The model includes a fuel cell system, a battery, an inverter and permanent synchronous motor, a bi-directional converter and a vehicle dynamics. Two three-phase permanent magnet synchronous motors (PMSM) are utilized to generate the required power for the vehicle traction. Maximum transmissible torque estimation (MTTE) control and sliding mode control are utilized for the PEM fuel cell vehicle traction control algorithms. The simulation results show that the proposed control algorithm effectively prevents vehicle slipping when a PEM fuel cell vehicle meets a sudden road friction change by distributing appropriate powers between battery and fuel cell.

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Yasuoka, Ikuo, Yasufumi Mochizuki, Shin-Ichi Toda, Yosuke Nakazawa, Gao Hongguang, and Liu Huiyan. "Consideration of wheel slip and readhesion control for induction traction motor electric locomotives with individual traction control." Electrical Engineering in Japan 169, no. 3 (November 30, 2009): 56–64. http://dx.doi.org/10.1002/eej.20883.

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Zong, Jian, Ping Qian, and Xue Feng Ding. "Study of Electrical Traction Locomotive Control System Based on Feed-Forward Decoupling Strategy." Advanced Materials Research 516-517 (May 2012): 1935–38. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1935.

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An asynchronous motor is widely used in traction locomotive system now, AC induction motor is nonlinear, strongly coupled and multivariable system, so it is very difficult to control as a linear system. For this, VVVF(Variable Voltage Variable Frequency) control method adopt in some running traction locomotives, that can reduce over-current with load starting and should be compensated at low frequency. Based on study the Control strategies of locomotives, vector control adopt in most electrical traction locomotive. According to the drawing performance requirements of electrical traction motor, feed-forward decoupling method adopted. Simulation and experiment proved this method can meet the traction locomotive control requirements.

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Amirov, Sultan, and Shavkat Mukhsimov. "INVESTIGATION OF THE CURRENT TRANSFORMER CONTROL SYSTEM WITH AUTOMATIC RANGE CONTROL." Technical Sciences 4, no. 1 (January 30, 2021): 4–12. http://dx.doi.org/10.26739/2181-9696-2021-1-1.

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The article examines the control system of a current transformer with automatic range control. All multi-limit current transformers allow measuring currents of different ranges with sufficient accuracy in the control systems of traction power supply devices. However, a common disadvantage for all of them is that if it is necessary to change the measurement range, the controlled current of the traction power supply device is disconnected from the power source, i.e. the production or technological process is forced to stop and dismantling and installation work is required. The proposed current transformer with automatic range control eliminates these disadvantages.Keywords:Current transformer, microcontroller, filter, control system, SSR relay, automatic system, harmonic

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Lee, Hyeongcheol, and Masayoshi Tomizuka. "Coordinated Longitudinal and Lateral Motion Control of Vehicles for IVHS." Journal of Dynamic Systems, Measurement, and Control 123, no. 3 (March 24, 1998): 535–43. http://dx.doi.org/10.1115/1.1386395.

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This paper presents a systematic design of the combined control of vehicle longitudinal and lateral motions for the Intelligent Vehicle Highway Systems (IVHS). A fully coordinated control of the steering and the accelerating/braking actions is presented to maximize the ability of distributing the traction forces in a desired way. This control method covers a broad range of driving condition by removing several conventional simplification on vehicle dynamics, such as the linearized lateral traction force assumption, the bicycle model assumption, and the non-slip assumption. The nominal traction force concept is also introduced to handle the unknown traction forces. Robust Adaptive Control (RAC) by backstepping for MIMO nonlinear systems is utilized to control the unmatched nonlinear vehicle dynamics, in the presence of parametric uncertainties and uncertain nonlinearities.

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Journal articles on the topic 'Traction control'

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