Relevant bibliographies by topics / Linear suspension

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Linear suspension'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Linear suspension"

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East, William, Jérôme Turcotte, Jean-Sébastien Plante, and Guifré Julio. "Experimental assessment of a linear actuator driven by magnetorheological clutches for automotive active suspensions." Journal of Intelligent Material Systems and Structures 32, no. 9 (February 11, 2021): 955–70. http://dx.doi.org/10.1177/1045389x21991237.

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The main functions of automotive suspensions are to improve passenger comfort as well as vehicle dynamic performance. Simultaneously satisfying these functions is not possible because they require opposing suspension adjustments. This fundamental design trade-off can be solved with an active suspension system providing real-time modifications of the suspension behavior and vehicle attitude corrections. However, current active suspension actuator technologies have yet to reach a wide-spread commercial adoption due to excessive costs and performance limitations. This paper presents a design study assessing the potential of magnetorheological clutch actuators for automotive active suspension applications. An experimentally validated dynamic model is used to derive meaningful design requirements. An actuator design is proposed and built using a motor to feed counter-rotating MR clutches to provide upward and downward forces. Experimental characterization shows that all intended design requirements are met, and that the actuator can output a peak force of ±5300 N, a peak linear speed of ±1.9 m/s and a blocked-output force bandwidth of 92 Hz. When compared to other relevant technologies, the MR approach simultaneously shows both better force density and speeds (bandwidth) while adding minimal costs and weight. Results from this experimental assessment suggest that MR slippage actuation is promising for automotive active suspensions.
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Buckner, Gregory D., Karl T. Schuetze, and Joe H. Beno. "Intelligent Feedback Linearization for Active Vehicle Suspension Control." Journal of Dynamic Systems, Measurement, and Control 123, no. 4 (July 3, 2000): 727–33. http://dx.doi.org/10.1115/1.1408945.

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Effective control of ride quality and handling performance are challenges for active vehicle suspension systems, particularly for off-road applications. Off-road vehicles experience large suspension displacements, where the nonlinear kinematics and damping characteristics of suspension elements are significant. These nonlinearities tend to degrade the performance of active suspension systems, introducing harshness to the ride quality and reducing off-road mobility. Typical control strategies rely on linear, time-invariant models of the suspension dynamics. While these models are convenient, nominally accurate, and tractable due to the abundance of linear control techniques, they neglect the nonlinearities and time-varying dynamics present in real suspension systems. One approach to improving the effectiveness of active vehicle suspension systems, while preserving the benefits of linear control techniques, is to identify and cancel these nonlinearities using Feedback Linearization. In this paper the authors demonstrate an intelligent parameter estimation approach using structured artificial neural networks that continually “learns” the nonlinear parameter variations of a quarter-car suspension model. This estimation algorithm becomes the foundation for an Intelligent Feedback Linearization (IFL) controller for active vehicle suspensions. Results are presented for computer simulations, real-time experimental tests, and field evaluations using an off-road vehicle (a military HMMWV). Experimental results for a quarter-car test rig demonstrate 60% improvements in ride quality relative to baseline (non-adapting) control algorithms. Field trial results reveal 95% reductions in absorbed power and 65% reductions in peak sprung mass acceleration using this IFL approach versus conventional passive suspensions.
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Wan, Yi, and Joseph M. Schimmels. "Improved Vibration Isolating Seat Suspension Designs Based on Position-Dependent Nonlinear Stiffness and Damping Characteristics." Journal of Dynamic Systems, Measurement, and Control 125, no. 3 (September 1, 2003): 330–38. http://dx.doi.org/10.1115/1.1592189.

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The design of seat suspensions having linear stiffness and damping characteristics involves a tradeoff between three performance measures. These measures are: (1) suspension range of motion, (2) improved average vibration isolation (weighted average across a wide exposure spectrum), and (3) improved isolation at the frequency of peak transmissibility. To overcome the limitations associated with this tradeoff, nonlinear mechanical properties are used here in the design of a seat suspension. From the infinite number of possible nonlinear mechanical characteristics, several possibilities that showed promise in previous studies were selected. The selected nonlinear force-deflection relationship (stiffness) of the seat is described by a combination of cubic and linear terms. The selected damping behavior of the seat is described by a combination of a linear term and a position-dependent term. A lumped parameter model (linear-human/nonlinear-seat) of the human/seat-suspension coupled system and a robust direct search routine are used to obtain pseudo-optimal values of the seat design parameters (mass, stiffness, and damping) via simulation in the time domain. Results indicate that the optimal nonlinear seat suspension is significantly better than the optimal linear seat suspension in overall vibration isolation characteristics.
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Liu, De Jun, Hui Da Duan, and Zhen Xiong Zhou. "Control of Magnetic Suspension Linear Feed System." Advanced Materials Research 616-618 (December 2012): 1918–21. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.1918.

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A magnetic suspension linear feed device has been introduced in this paper, it is consist of linear motion and suspension parts. The mathematical model of suspension system is modeled. Aiming at the suspension part which is an nonlinear and strong coupling system, the auto-disturbance rejection controller (ADRC) is used. The inner disturbance and outside disturbance is observed and compensated, the result of simulation indicates the suspension control A magnetic suspension linear feed device has been introduced in this paper, it is consist of linear motion and suspension parts. The mathematical model of suspension system is modeled. Aiming at the suspension part which is an nonlinear and strong coupling system, the auto-disturbance rejection controller (ADRC) is used. The inner disturbance and outside disturbance is observed and compensated, the result of simulation indicates the suspension control has better dynamic, static and robust characters by using the auto-disturbance rejection controller.
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Hirata, Tohru, Takasi Hikihara, and Yoshihisa Hirane. "Suspension characteristics of magnetic suspension system by linear induction motor." IEEJ Transactions on Industry Applications 110, no. 10 (1990): 1091–99. http://dx.doi.org/10.1541/ieejias.110.1091.

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Hirata, Tohru, Takashi Hikihara, and Yoshihisa Hirane. "Suspension characteristics of magnetic suspension system by linear induction motor." Electrical Engineering in Japan 111, no. 3 (1991): 136–44. http://dx.doi.org/10.1002/eej.4391110315.

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7

Xia, Jun Zhong, Zong Po Ma, Shu Min Li, and Xiang Bi An. "Influence of Vehicle Suspension System on Ride Comfort." Applied Mechanics and Materials 141 (November 2011): 319–22. http://dx.doi.org/10.4028/www.scientific.net/amm.141.319.

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This paper focuses on the influence of various vehicle suspension systems on ride comfort. A vehicle model with eight degrees of freedom is introduced. With this model, various types of non-linear suspensions such as active and semi-active suspensions are investigated. From this investigation, we draw the conclusion that the active and semi-active suspensions models are beneficial for ride comfort.
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Mohite, Ajit G., and Anirban C. Mitra. "Development of Linear and Non-linear Vehicle Suspension Model." Materials Today: Proceedings 5, no. 2 (2018): 4317–26. http://dx.doi.org/10.1016/j.matpr.2017.11.697.

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Zhang, Yu Lin. "Sliding Mode Control for Magneto-Rheological Vehicle Suspension Accounting for its Nonlinearity." Applied Mechanics and Materials 433-435 (October 2013): 1072–77. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1072.

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The non-linear characteristics of magneto-rheological (MR) suspension systems have limited control performance of modern control theory based on linear feedback control. In this paper, a four DOF half car suspension model with two nonlinear MR dampers is adopted. In order to account for the nonlinearity, a sliding mode controller, which has inherent robustness against system nonlinearity, is formulated to improve comfort and road holding of the car under industrial specifications and it is fit to semi-active suspensions. The numerical result shows that the semi-active suspension using the sliding mode controller can achieve better ride comfort than the passive and also improve stability.
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Pisarski, Dominik, and Czeslaw I. Bajer. "Smart Suspension System for Linear Guideways." Journal of Intelligent & Robotic Systems 62, no. 3-4 (August 7, 2010): 451–66. http://dx.doi.org/10.1007/s10846-010-9450-7.

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Dissertations / Theses on the topic "Linear suspension"

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Eckert, Paulo Roberto. "Estudo e desenvolvimento de um atuador linear para suspensão eletromagnética ativa." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/55456.

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Este trabalho foca o estudo e desenvolvimento de um atuador linear com ímãs permanentes aplicado a sistemas de suspensão ativa, com ênfase em suspensão veicular. Seu desenvolvimento considera aspectos específicos como força, volume, razão força/volume, curso e resposta em frequência. Junto ao estudo teórico desenvolve-se o projeto baseado na simulação paramétrica em elementos finitos que analisa aspectos qualitativos e quantitativos importantes para tomada de decisão do projeto, especificamente na definição de materiais e geometrias. Para servir como ferramenta de análise foi empregada uma modelagem analítica que se mostrou eficiente, pois foi capaz de produzir resultados de forma mais rápida que o método de elementos finitos para avaliar grandezas de interesse como força e densidade de fluxo magnético. Por fim e com base nos aspectos de projeto, foi construído um protótipo que permitiu validar os modelos. Os resultados experimentais e teóricos mostraram boa concordância o que permite concluir que os métodos empregados são eficazes, fornecendo subsídios à aplicação em foco.
This work aims the study and development of a linear actuator with permanent magnets applied to active suspension systems, with emphasis on vehicular suspension. That development takes into account specific features such as force, volume, force per volume ratio, stroke and frequency response. Together with the theoretical study the design of the actuator is carried out based on parametric simulation by means of finite elements which analyses qualitative and quantitative aspects that are important to make the project decision, specifically to define materials and geometry. To suit as an analysis tool it was employed an analytical modelling, which showed to be efficient because it was capable of producing faster results than the finite elements method to evaluate physical quantities of interest such as force and magnetic flux density. Finally and based on project aspects, a prototype was built which allowed to validate all models. Experimental and theoretical results showed a good agreement which led to conclude that the employed methods are efficient, providing subsidies to the studied application.
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Soli, Riccardo. "Non-Linear Analysis and Design of Cable Systems in Suspension Bridges." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15045/.

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The scope of the presented research project is to provide a reliable guideline for the preliminary design of cable supported bridges. In order to pursue this objective, a thorough literature research has been conducted in the first phase of the project. This has been of relevant importance for the understanding of the subject and further implementation of the case study: the design of a suspension bridge model in Strand7. The conducted research has shown that there is not a unique book to which engineers may refer in order to conduct the type of analysis presented in this project. Therefore, the proposed guideline has been created on the basis of multiple text books. Further analyses have been conducted in order to evaluate the accuracy of theoretical-based results and software-based results. In particular the Steinman Modified Elastic Treatment has been applied to the case study and its results compared to those obtained on Strand7. The obtained results finally show that Steinman’s Theory represents a quick and reliable method to be adopted for preliminary design purposes as its results are in line with Strand7 results.
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Wong, David Ka-Kui. "The synthesis of linear-optimal heave control of electromagnetic suspension systems." Thesis, University of Bath, 1985. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370456.

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This thesis is concerned with the synthesis of linear-optimal heave control of electromagnetic suspension systems. The methods of computer-aided analysis and simulation were employed in this research. The intrinsic properties of electromagnetic suspension system were investigated to facilitate the synthesis and to provide guidelines for the design of electromagnets or linear motors suitable for use in suspension systems. The technique of complementary filtering, which resolves the conflicting requirements of high stiffness to load and high compliance for ride-comfort, was further developed. This led to the ability of directly comparing the merits of systems with different configurations and determining the optimal natural frequency. Together with a novel way of removing steady state gap error during the traversing of transition curves, the filtering technique was applied to the system using fixed-gain and sliding-mode variable-structure control methods. The latter method is well known for its abi1ity in maintaining closed-loop characteristics in the presence of disturbance. However, further development was required before it was applied. The resultant suspension system gave a 20% improvement in ride-quality over the best published result which was carried out under similar test conditions. Even so, theoretical analysis showed that a four-fold improvement may be possible.
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Salem, Mahmoud. "Investigation of a non-linear suspension in a quarter car model." Thesis, Aston University, 2018. http://publications.aston.ac.uk/37523/.

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This thesis presents the study of a quarter car model which consists of a two-degree-of-freedom (2 DOF) with a linear spring and a nonlinear spring configuration. In this thesis, the use of non-linear vibration attachments is briefly explained, and a survey of the research done in this area is also discussed. The survey will show what have been done by the researches in this new field of nonlinear attachments. Also, it will be shown that this topic was not extensively researched and is a new type of research where no sufficient experimental work has been applied. As an application, a quarter car model was chosen to be investigated. The aim of the Thesis is to validate theoretically and experimentally the use of nonlinear springs in a quarter car model. Design the new type of suspension and insert it in the experimental set up, built from the ground up in the laboratory. A novel criterion for optimal ride comfort is the root mean square of the absolute acceleration specified by British standards ISO 2631-1997. A new way to reduce vibrations is to take advantage of nonlinear components. The mathematical model of the quarter-car is derived, and the dynamics are evaluated in terms of the main mass displacement and acceleration. The simulation of the car dynamics is performed using Matlab® and Simulink®. The realization of vibration reduction through one-way irreversible nonlinear energy localization which requires no pre-tuning in a quarter car model is studied for the first time. Results show that the addition of the nonlinear stiffness decreases the vibration of the sprung mass to meet optimal ride comfort standards. As the passenger is situated above the sprung mass, any reduction in the sprung mass dynamics will directly have the same effect on the passenger of the vehicle. The future is in the use of a nonlinear suspension that could provide improvement in performance over that realized by the passive, semi active and active suspension. The use of a quarter car model is simple compared to a half car model or a full car model, furthermore in the more complex models you can study the heave and the pitch of the vehicle. For the initial study of the nonlinear spring the quarter car model was sufficient enough to study the dynamics of the vehicle. Obtaining an optimum suspension system is of great importance for automotive and vibration engineer involved in the vehicle design process. The suspension affects an automobile’s comfort, performance, and safety. In this thesis, the optimization of suspension parameters which include the spring stiffness and damper coefficient is designed to compromise between the comfort and the road handling. Using Genetic algorithm an automated optimization of suspension parameters was executed to meet performance requirements specified. Results show that by optimizing the parameters the vibration in the system decreases immensely.
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Imal, Erkan. "Suspension and propulsion forces on thin-plate secondaries of linear reluctance motors." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358289.

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Allen, Justin Aaron. "Design of active suspension control based upon use of tubular linear motor and quarter-car model." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86036.

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The design, fabrication, and testing of a quarter-car facility coupled with various control algorithms are presented in this thesis. An experimental linear tubular motor, capable of producing a 52-N force, provides control actuation to the model. Controllers consisting of two designs were implemented: a classical controller employing lead and lag networks and a state-space feedback design. Each design was extensively simulated to screen for receptiveness to actuation force limitations and robustness regarding the inexact tire modeling. The goal of each controller was to minimize the acceleration of the sprung mass in the presence of simulated road disturbances, modeled by both sinusoidal and step input excitation wheels. Different reference velocity inputs were applied to the control scheme. Responses to a zero reference were juxtaposed to those that resulted from tracking a reference built off a model that incorporated inertial-frame damping attached to the sprung mass. The outcome of this comparison was that low-frequency disturbances were attenuated better when tracking a zero reference, but the reference relaxation introduced by the inertialframe damping model allowed for better-attenuated high frequency signals. Employing an inertial-frame damping value of 250 N-s/m, the rejected frequency component of the system response synchronous with the disturbance input excitation of 40 rad/s bettered by 33% and 28% when feeding control force from the classical controller and state-space controller, respectively. The experimental analysis conducted on the classical and state-space controllers produced sinusoidal disturbance rejection of at worst 50% within their respective bandwidths. At 25 rad/s, the classical controller was able to remove 80% of the base component synchronous with the disturbance excitation frequency, while the state-space controller filtered out nearly 60%. Analysis on the system's ability to reject step disturbances was greatly confounded with the destructive lateral loading transferred during the excitation process. As a result, subjection to excitation could only occur up to 25 rad/s. At the 20 rad/s response synchronous to the disturbance excitation, the classical and state-space controllers removed 85% and 70% of the disturbance, respectively. Sharp spikes in timebased amplitude were present due to the binding that ensued during testing.
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Louam, Nadjib. "The application of linear optimal control theory to the design of active automotive suspensions." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290934.

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Zebiri, Hossni. "Hinf-Linear Parameter Varying Controllers Order Reduction : Application to semi-active suspension control." Thesis, Mulhouse, 2016. http://www.theses.fr/2016MULH7733/document.

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L'amélioration permanente de la qualité et des performances des systèmes automatiques constitue un défi majeur dans la théorie du contrôle. La théorieHinf a permis d'améliorer considérablement les performances des correcteurs. Ces derniers reposent sur des modèles mathématiques qui sont potentiellement d'ordre élevé (c.-à-d. comprenant un nombre élevé d'équations différentielles). De plus, l'ajout de poids de pondérations spécifiant les performances à respecter accroit encore plus leur ordre. La complexité algorithmique résultante peut alors rendre leur implantation difficile voire même impossible pour un fonctionnement en temps réel.Les travaux présentés visent à réduire l'ordre de correcteurs Hinf dans le but de faciliter leur intégration tout en respectant les performances imposées d'une part et proposent une majoration de l'erreur introduite par l'étape de réduction d'autre part.Dans la littérature, de nombreuses méthodes pour la réduction d'ordre de modèles et de correcteurs des systèmes LTI ont été développées. Ces techniques ont été étudiées, comparées et testées sur un ensemble de benchmarks. S'appuyant sur ces travaux, nous proposons une extension aux systèmes linéaires à paramètres variants (LPV). Pour valider leurs performances, une application sur une commande d'une suspension semi-active a montré l'efficacité des algorithmes de réduction développés
The work presented in this dissertation is related to the Hinf-LPV-controller orderReduction. This latter consists of the design of a robust reduced-order LPV-controller for LPV-systems. The order reduction issue has been very fairly investigated. However, the case of LPV-control design is slightly discussed. This thesis focuses primarily on two topics: How to obtain an LPV-reduced-order controller even the high order generated by the classical synthesis and how this reduced order controller can deal with a practical engineering problem (semi-active suspension control). In view of this, the order-reduction topic and the Hinf-synthesis theory have been widely studied in this thesis. This study, has allowed the development of a new method forH1-LPV-controller order reduction
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Yang, Shuai. "Development of Non-linear Two-Terminal Mass Components for Application to Vehicle Suspension Systems." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36497.

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To achieve passive vibration control, an adaptive flywheel design is proposed and fabricated from two different materials. The corresponding mathematical models for the adaptive flywheels are developed. A two-terminal hydraulic device and a two-terminal inverse screw device are introduced to analyze the two adaptive flywheels. Experiments are carried out to identify key parameters for both the two-terminal hydraulic system and the inverse screw system. The performance of three different suspension systems are evaluated; these are the traditional suspension system, the suspension system consisting of an ideal two-terminal device with constant flywheel and the suspension system consisting of an ideal two-terminal device with an adaptive flywheel (AFW suspension system). Results show that the AFW suspension system can outperform the other two suspension systems under certain conditions. The performance of a suspension system with the adaptive flywheel under different changing ratio is evaluated, and an optimal changing ratio is identified under certain circumstances. To obtain the steady-state response of the two-terminal device with adaptive flywheel, three different methods have been applied in this thesis. These methods are the single harmonic balance method, the multi-harmonic balance method and the scanning iterative multi-harmonic balance method, respectively. Compared to the single harmonic balance method, the multi-harmonic balance method provides a much more accurate system response. However, the proposed scanning iterative multi-harmonic balance method provides more accurate system response than the single harmonic balance method with much less computational effort.
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Eckert, Paulo Roberto. "Metodologia de projeto de atuador eletromagnético linear para sistemas de suspensão semiativa e ativa." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/143941.

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Este trabalho apresenta uma metodologia de projeto de atuadores eletromagnéticos lineares inovadora para aplicação em sistemas de suspensão semiativa e ativa. A metodologia, apresentada na forma de fluxograma, define critérios para determinar os requisitos de força e curso que um atuador deve desenvolver considerando um sistema mecânico vibratório com um grau de liberdade com excitação harmônica de base quando o método de controle skyhook é aplicado. Um atuador eletromagnético linear de bobina móvel com duplo arranjo de quase-Halbach que apresenta elevada densidade de força, reduzida massa móvel, ausência de força de relutância e baixa ondulação de força é definido como estudo de caso. Um modelo numérico parametrizado em elementos finitos do comportamento eletromagnético de um passo polar do dispositivo é criado e analisado, considerando restrições dimensionais, com os objetivos de projeto definidos como: elevada densidade de força e reduzida ondulação de força com acionamento brushless CA. Com base no modelo de um passo polar do dispositivo, define-se o volume ativo que o mesmo deve apresentar e, a partir deste, todas as dimensões são definidas de forma a atender os requisitos de projeto. Uma vez definidas as dimensões do atuador com base no modelo eletromagnético, realiza-se a modelagem térmica numérica que permite avaliar qual a máxima densidade de corrente elétrica aplicável de forma que a temperatura, estipulada como máxima, nos enrolamentos não seja excedida. Ainda, a distribuição térmica permite determinar a temperatura de operação dos ímãs permanentes que têm curva de operação dependente da temperatura. A partir dos resultados da simulação térmica e do modelo eletromagnético para um passo polar, realizou-se o acoplamento eletromagnético-térmico por meio da correção das propriedades dos ímãs permanentes e aplicando uma densidade de corrente eficaz dependente das dimensões do modelo parametrizado. O modelo acoplado é simulado e analisado, de modo que as dimensões finais do atuador podem ser obtidas atendendo aos mesmos objetivos de projeto previamente mencionados, respeitando os limites de operação térmica. Adicionalmente, são apresentados modelos analíticos do comportamento eletromagnético e térmico do atuador que podem servir de base para implementação da metodologia proposta, se esta for baseada em modelos analíticos, e podem futuramente ser empregados para a aplicação de otimização matemática do dispositivo. Por fim, um protótipo do dispositivo é construído de forma a validar a metodologia proposta. Com este protótipo são realizados ensaios de densidade de fluxo magnético no entreferro, tensão induzida a vazio, força estática e ensaio dinâmicos com o dispositivo instalado em uma bancada de testes de vibrações controladas desenvolvida durante o projeto. Os resultados mostram a eficácia da metodologia proposta, uma vez que os resultados experimentais mostraram boa concordância com os resultados esperados.
This work presents an innovative linear electromagnetic actuator design methodology for application in semi-active and active suspension systems. The methodology, synthesized in a flowchart, sets criteria to determine requirements such as axial force and stroke that an actuator should develop considering a vibration system with one degree of freedom with harmonic base excitation when the skyhook control method is applied. A linear moving-coil electromagnetic actuator with dual quasi-Halbach arrays of permanent magnets that presents high force density, low moving-mass, no reluctance force and low force ripple is defined as a case study. A finite element numerical parameterized model that describes the electromagnetic behavior of one pole pitch of the device is created and analyzed, considering dimensional constraints, with the design objectives defined as: high force density and low ripple of force with brushless AC drive. Based on the model of one pole pitch of the device the active volume and all dimensions are defined in order to meet the design requirements. Once the actuator dimensions are defined, based on the electromagnetic model, a numerical thermal model was constructed, which allows to evaluate the maximum applicable electric current density so that the maximum temperature at the windings is not exceeded. Furthermore, the thermal distribution gives the operating temperature of the permanent magnets, which present performance highly dependent on temperature. With the results of the thermal simulation, the electromagnetic-thermal coupling is performed by correcting permanent magnet properties and by applying a parametric-dependent effective current density. The coupled model is simulated and analyzed so that the final dimensions of the actuator can be obtained with the same design objectives previously mentioned, while respecting thermal operating limits. In addition, the work presents analytical models of the electromagnetic and thermal behavior of the actuator that can be the basis for implementation of the proposed methodology, if it is based on analytical models, and can further be used for the application of mathematical optimization of the device. Finally, a prototype was built to validate the proposed method. Measurements were carried out to assess magnetic flux density in the air gap, open-circuit induced voltage, static force and dynamic tests with the device installed in a test bench that was developed during this work. The results show the effectiveness of the proposed method since experimental results have shown good agreement with the expected results.
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Books on the topic "Linear suspension"

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Harrison, R. F. A new non-linear design method for active vehicle suspension systems. Sheffield: Univ. of Sheffield, Dept. of Automatic Control & Systems Eng, 1998.

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Impact of magnetic isolation on pointing system performance in the presence of structural flexibility. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

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3

An LQR controller design approach for a large gap magnetic suspension system (LGMSS). Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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Furst, Eric M., and Todd M. Squires. Laser tweezer microrheology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199655205.003.0009.

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To many, the idea that light can be used to hold and manipulate matter is probably quite foreign. The photon is a seemingly evanescent particle; its interactions with matter are weak. But while it has no rest mass, a photon carries momentum. Optical traps have become important tools used to measure forces on nanometer to micrometer length scale. Laser tweezers can be used to drive (or hold) microrheological probes. Optical trapping forces are reviewed and optical trap designs discussed, incluing the use of fixed and moving reference frame optical traps. Proper calibration of optical traps especially in the material under test is discussed. Linear and non-linear measurements using laser tweezers are presented, including shear thinning of colloidal dispersions when probes are translated through a suspension. The operating regime of laser tweezer microrheology is presented.
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Li, Hong. Non-linear control approaches for active railway suspensions. 1997.

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Book chapters on the topic "Linear suspension"

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Gáspár, Péter, and Zoltán Szabó. "Design of a Hierarchical Controller for Suspension Systems." In Robust Control and Linear Parameter Varying Approaches, 311–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_12.

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He, Zhangqiang, and Wang Li. "An Active Positive Stiffness Elastic Suspension Method Based on Absolute Linear Scale." In Lecture Notes in Electrical Engineering, 390–99. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9441-7_40.

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Wang, Jiabin, Weiya Wang, Simon Tuplin, and Matthew Best. "Design and Control of a Linear Electromagnetic Actuator for Active Vehicle Suspension." In Advanced Microsystems for Automotive Applications 2010, 311–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16362-3_30.

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Abdeen, Ahmed A., Khalil Ibrahim, and Abo-Bakr M. Nasr. "Active Suspension System Design Using Fuzzy Logic Control and Linear Quadratic Regulator." In Advances in Intelligent Systems and Computing, 152–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99010-1_14.

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Ben Hassen, Dorra, Mariem Miladi, Mohamed Slim Abbes, S. Caglar Baslamisli, Fakher Chaari, and Mohamed Haddar. "Effect of Non-linear Suspension on the Recognition of the Road Disturbance." In Applied Condition Monitoring, 65–74. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-85584-0_7.

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Patra, Akshaya Kumar, Alok Kumar Mishra, Anuja Nanda, Narendra Kumar Jena, and Bidyadhar Rout. "Modeling, Analysis, and Control of Vehicle Suspension System Based on Linear Quadratic Regulator." In Lecture Notes in Networks and Systems, 254–63. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2774-6_32.

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Syed Mohd Putra, Sharifah Munawwarah, Fitri Yakub, Mohamed Sukri Mat Ali, Noor Fawazi Mohd Noor Rudin, Zainudin A. Rasid, Aminudin Abu, and Mohd Zamzuri Ab Rashid. "Improvement on Ride Comfort of Quarter-Car Active Suspension System Using Linear Quadratic Regulator." In Proceedings of the Second International Conference on the Future of ASEAN (ICoFA) 2017 – Volume 2, 431–41. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8471-3_43.

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Pratt, I., and R. M. Goodall. "Optimisation of Non-Linear Inter-Vehicle Active Suspension Control Laws Applied to Railway Trains." In Solid Mechanics and Its Applications, 321–28. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5778-0_39.

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Woernle, Christoph. "Trajectory Tracking for a Three-Cable Suspension Manipulator by Nonlinear Feedforward and Linear Feedback Control." In Mechanisms and Machine Science, 371–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31988-4_23.

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Do, Anh-Lam, Charles Poussot-Vassal, Olivier Sename, and Luc Dugard. "LPV Control Approaches in View of Comfort Improvement of Automotive Suspensions Equipped with MR Dampers." In Robust Control and Linear Parameter Varying Approaches, 183–212. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_7.

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Conference papers on the topic "Linear suspension"

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Raghavan, Madhusudan. "Suspension Mechanism Synthesis for Linear Toe Curves." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASME, 2002. http://dx.doi.org/10.1115/detc2002/mech-34305.

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Liu, Zhengmeng, and Jiabin Wang. "A High Force Density Linear Actuator for Active Suspension." In 2019 12th International Symposium on Linear Drives for Industry Applications (LDIA). IEEE, 2019. http://dx.doi.org/10.1109/ldia.2019.8770977.

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Lakshmanan, K. S. "Non-Linear Characteristics Suspension System for Tracked Vehicle." In SIAT 2005. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-26-064.

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Hac, A. "Optimal linear preview control of active vehicle suspension." In 29th IEEE Conference on Decision and Control. IEEE, 1990. http://dx.doi.org/10.1109/cdc.1990.203284.

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Kou, Farong, Quan Ren, and Tao Fang. "Research on performance of linear motor active suspension." In 2017 IEEE 2nd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC). IEEE, 2017. http://dx.doi.org/10.1109/itnec.2017.8284936.

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Oledzki, Wieslaw J. "Progressive Rate Steel Vehicle Suspension." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13093.

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It is well known that progressiveness of the damping characteristic of vehicle suspension is a highly desirable feature that substantially improves shock absorption transmitted from the road wheels to the body of a vehicle. It is also well known that progressive rate vehicle suspensions with smooth (i.e. differentiable) damping characteristic commonly in use are pneumatic and hydro-pneumatic ones. However, these suspensions are inferior to steel ones in many aspects such as strength, durability, reliability and cost, and their damping characteristic, being determined by the thermodynamic properties (adiabatic exponent) of the gas (air or nitrogen) they utilize, cannot be freely adjusted and is far from optimum. There are also some progressive rate vehicle suspensions fitted with steel springs, but they usually features inferior non-differentiable damping characteristic. The problem of constructing purely mechanical steel progressive rate vehicle suspension has been undertaken by many inventors, but none of such suspensions proposed in the past was a success. This is due to the fact that those suspensions used unreliable and perishable cam mechanisms to achieve required non-linearity of damping characteristic. In the present article we briefly discuss an innovative recently patented [1-4] vehicle suspension, that produces progressive rate smooth damping characteristic out of linear characteristic of steel spring of any kind, which damping characteristic can be adjusted to any specific requirements, and which features extraordinarily compact and robust structure. It is to be stressed that the suspension presented in this paper has yet not been tested in a vehicle, but some measurements has been made using a steel model of a "flat" version of the suspension mechanism proving general assumptions behind the design.
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Verros, G., G. Georgiou, and S. Natsiavas. "Multi-Objective Optimisation of Quarter-Car Models With Linear or Piecewise Linear Suspension Dampers." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85232.

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A systematic methodology is applied leading to optimum selection of the suspension damping and stiffness parameters for two degree of freedom quarter-car models, subjected to road excitation. First, models involving passive damping with constant or dual rate characteristics are considered. Then, models where the damping coefficient of the suspension is selected so that the resulting system approximates the performance of an active suspension system with sky-hook damping are also examined. For all these models, appropriate methodologies are first employed for locating the motions of the vehicle resulting from passing over roads of a given geometric profile with constant horizontal speed. Three suitable performance indices are then defined, whose optimisation yields the most important suspension stiffness and damping parameters. Since these indices are conflicting, a suitable multi-objective optimisation methodology is set up and applied. As a result, a series of diagrams with typical numerical results are obtained and presented in both the corresponding objective spaces (in the form of classical Pareto fronts) and parameter spaces, for vehicle models running over roads involving an isolated or a distributed geometric irregularity.
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Stahl, Patrick, and G. Nakhaie Jazar. "Frequency Response Analysis of Piecewise Nonlinear Vibration Isolator." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84879.

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Non-smooth piecewise functional isolators are smart passive vibration isolators that can provide effective isolation for high frequency/low amplitude excitation by introducing a soft primary suspension, and by preventing a high relative displacement in low frequency/high amplitude excitation by introducing a relatively damped secondary suspension. In this investigation a linear secondary suspension is attached to a nonlinear primary suspension. The primary is assumed to be nonlinear to model the inherent nonlinearities involved in real suspensions. However, the secondary suspension comes into action only during a short period of time, and in mall domain around resonance. Therefore, a linear assumption for the secondary suspension is reasonable. The dynamic behavior of the system subject to a harmonic base excitation has been analyzed utilizing the analytic results derived by applying the averaging method. The analytic results match very well in the transition between the two suspensions. A sensitivity analysis has shown the effect of varying dynamic parameters in the steady state behavior of the system.
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Maruyama, Kyohei, and Susumu Torii. "Gap-sensor-less electromagnetic suspension system using force sensor." In 2017 11th International Symposium on Linear Drives for Industry Applications (LDIA). IEEE, 2017. http://dx.doi.org/10.23919/ldia.2017.8097267.

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Satoh, Naoshi, Tetsuya Sakai, and Mamoru Aida. "Non-Linear FEM Analysis of the Trunnion Suspension System." In International Truck & Bus Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1991. http://dx.doi.org/10.4271/912714.

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Reports on the topic "Linear suspension"

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Brown, Ross, Jason Pusey, Muthuvel Murugan, and Dy Le. Comparison of Performance Effectiveness of Linear Control Algorithms Developed for a Simplified Ground Vehicle Suspension System. Fort Belvoir, VA: Defense Technical Information Center, April 2011. http://dx.doi.org/10.21236/ada543109.

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Ludtke, W. P. Force Distribution in the Suspension Lines of Cross Parachutes. Fort Belvoir, VA: Defense Technical Information Center, December 1989. http://dx.doi.org/10.21236/ada262414.

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