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Articles de revues sur le sujet "Passive magnetic suspension":
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Nguyen, V., J. Delamare et J. P. Yonnet. « A passive damper for magnetic suspension ». IEEE Transactions on Magnetics 30, no 6 (1994) : 4749–51. http://dx.doi.org/10.1109/20.334210.
Zádor, István, Ádám Török, Pál Rácz et Istvan Vajda. « Green Energy from Road Vehicle Shock Absorber ». Materials Science Forum 792 (août 2014) : 287–92. http://dx.doi.org/10.4028/www.scientific.net/msf.792.287.
It is still a difficult problem to solve for a suspension system simultaneously to hold the body of the car in comfort and to execute the requirements of other safety systems like ABS, ESP, steer-by-wire, etc systems. Passive suspension systems are unlikely to provide a solution, the introduction of semi-active suspensions in the practical use is necessary. A possible solution could be a permanent magnetic (PM) synchronous tube generator, which can operate as a controllable shock absorber parallel with energy recuperative operation. Designer software is realized, to calculate the geometrical and electrical parameters of permanent magnetic (PM) or high temperature superconductor (HTS) magnets for arbitrary vehicle suspension systems
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Zador, István, Ádám Török, István Vajda et László Palkovics. « OSCILLATION CONTROL OVER LIGHT DUTY CARS USING MAGNETIC SEMI-ACTIVE SHOCK ABSORBERS ». TRANSPORT 26, no 3 (5 octobre 2011) : 284–89. http://dx.doi.org/10.3846/16484142.2011.622357.
The present vehicles on the road are equipped with an extended range of actuators, sensors and software controlling dynamics. It is still a difficult problem to solve for a suspension system simultaneously holding the body of the car in comfort and executing requirements imposed for other safety systems like ABS, ESP, steer-by-wire etc. Passive suspension systems are unlikely to provide a solution, and therefore the introduction of semi-active suspensions in practical use is necessary. A possible solution could be a permanent magnetic (PM) synchronous tube generator that can operate as a controllable shock absorber parallel with energy recuperative operation. Design software is realized to calculate geometrical and electrical parameters for arbitrary vehicle suspension systems.
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D’Angola, A., G. Carbone, L. Mangialardi et C. Serio. « Non-linear oscillations in a passive magnetic suspension ». International Journal of Non-Linear Mechanics 41, no 9 (novembre 2006) : 1039–49. http://dx.doi.org/10.1016/j.ijnonlinmec.2006.10.013.
LeMarquand, Guy, et Jean‐Paul Yonnet. « A partially passive magnetic suspension for a discoidal wheel ». Journal of Applied Physics 64, no 10 (15 novembre 1988) : 5997–99. http://dx.doi.org/10.1063/1.342128.
Bonisoli, E., et A. Vigliani. « Identification techniques applied to a passive elasto-magnetic suspension ». Mechanical Systems and Signal Processing 21, no 3 (avril 2007) : 1479–88. http://dx.doi.org/10.1016/j.ymssp.2006.05.009.
Foong Soong, Ming, Rahizar Ramli, Ahmad Abdullah Saifizul et Mahdieh Zamzamzadeh. « Applicability of A Rotary Eddy Current Damper in Passenger Vehicle Suspension with Parallel Inerter ». International Journal of Engineering & ; Technology 7, no 3.17 (1 août 2018) : 76. http://dx.doi.org/10.14419/ijet.v7i3.17.16626.
Numerous studies have proven that the performance of vehicle suspension can be benefited by an inerter in parallel to conventional spring-damper setup, yet its usability in passenger vehicle suspension is still limited by practical consideration in physical implementation. One way of achieving better physical implementation of the parallel inerter suspension layout is to exploit the inerter’s flywheel as a metallic conductor to integrate passive damping in the form of a rotary eddy current damper. However, the feasibility of eddy current damping in this specific application remains unknown. This study investigates the applicability of eddy current damping incorporated in an inerter in terms of the achievable damping rates as required in typical passenger vehicle suspensions. In the study, passive eddy current damping due to constant magnetic field around the flywheel of a mathematically designed inerter was computed through simulation, and the range of achievable damping rates due to parametric variations, for instance air gap and magnetic coverage, was evaluated. Results of the parametric analysis showed that the induced eddy current damping from a rack-and-pinion inerter’s flywheel, considering the designed inertance as prerequisite, was at least capable of achieving 1500 Nsm-1. As the achievable damping was within the range of suitable damping rates for typical passenger vehicles, rotary eddy current damper was deemed applicable in passenger vehicle suspension employing parallel inerter.
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Cao, Shinan, Pingjuan Niu, Wei Wang, Tiantian Zhao, Qiang Liu, Jie Bai et Sha Sheng. « Novel Magnetic Suspension Platform with Three Types of Magnetic Bearings for Mass Transfer ». Energies 15, no 15 (5 août 2022) : 5691. http://dx.doi.org/10.3390/en15155691.
For ultra-precision, large stroke, and high start/stop acceleration, a novel magnetic suspension platform with three types of magnetic bearings is proposed. The structure and working principle of the novel platform are introduced. The passive magnetic bearings are used to compensate for the weight of the actuator. The repulsive force of the passive magnetic bearing model is established and analyzed. The Lorentz force-type magnetic bearings are used to provide driving force and rotational torque in the XY-plane. The driving force model and rotational torque model are established. The electromagnetic suspension bearing is used to provide driving force in the Z-axis and rotational torque along the X-axis and Y-axis. A novel Halbach magnetic array is designed to improve the magnetic flux density in the air gap. The finite element method is used to validate the force model, torque model, and magnetic flux density in the air gap. The results show that the maximum force of the passive magnetic bearing is 79 N, and the rotational torque stiffness is 35 N/A in the XY-plane and 78 N/A along the Z-axis. The driving force stiffness is 91 N/A in the XY-plane and 45 N/A along Z-axis.
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Linares, Henrique, Carlos Frajuca, Fabio S. Bortoli, Givanildo A. Santos et Francisco Y. Nakamoto. « Magnetic Suspension with Motorization to Measure the Speed of Gravity ». International Journal of Modern Physics : Conference Series 45 (janvier 2017) : 1760020. http://dx.doi.org/10.1142/s2010194517600205.
This work aims to design a magnetic suspension for an experiment to measure gravitys velocity. Such device must rotate two objects symmetrically with the greatest mass and largest radius as possible, at the speed of [Formula: see text], which means this device falls into the high-speed machines category. The guidelines and solutions proposed in this paper constitute a contribution to this class of engineering problems and were based on an extensive literature search, contacts with experts, the tutors and author’s experience, as well as on experimental results. The main solution proposed is a hybrid bearing that combines a radial passive magnetic bearing with an axial sliding bearing, here called MPS (Magnetic Passive and Sliding) bearing.
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Falkowski, Krzysztof, Maciej Henzel, Paulina Kurnyta-Mazurek, Mariusz Janczewski et Mariusz Ważny. « Magnetic Suspension Technology for Electric Jet Engines ». Bulletin of the Military University of Technology 70, no 3 (30 septembre 2021) : 49–70. http://dx.doi.org/10.5604/01.3001.0015.8771.
Reducing the emission of harmful compounds such as carbon dioxide and nitrogen oxides has been identified as a priority target in the European Union. Aviation is one of the main sources of pollution. The reduction of pollutant emissions can be achieved by the use of the electric jet engine. This type of a jet engine differs significantly from a kerosene-powered engine. The article presents the concept of an electric jet engine with the rotor that is magnetically suspended. Demonstrators of active and passive magnetic bearing technologies and bearingless electric motors, developed at the Avionics Department, are presented in the paper.
Thèses sur le sujet "Passive magnetic suspension":
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Allag, Hicham. « Modèles et calcul des systèmes de suspension magnétique passive : développements et calculs analytiques en 2D et 3D des interactions entre les aimants permanents ». Grenoble INPG, 2010. https://theses.hal.science/tel-00569274.
Les suspensions magnétiques passives fonctionnent grâce aux forces d'attraction ou de répulsion exercées entre des aimants permanents. Après avoir donné un panorama des différentes configurations possibles de suspensions magnétiques, le calcul des interactions entre des aimants permanents a été développé. Les calculs sont effectués à des parallélépipèdes aimantés, pour lesquels l'aimantation est représentée par des distributions de charges ou de pôles (approche coulombienne). L'ensemble des interactions (énergie, forces, couples,. . . Etc. ) a été calculé par des méthodes entièrement analytiques – une partie importante de ces résultats sont originaux The passive magnetic suspensions operate using attractive or repulsive forces exerted between permanent magnets. After giving an overview of different possible configurations of magnetic suspensions, the calculation of interactions between permanent magnets was developed. The calculations are realised for parallelepipeds magnets, where the magnetization is represented by distributions of charges or poles (Coulombian approach). All interactions (energy, forces, torques, etc. . . . ) was calculated by analytical methods - a significant part of these results are original. -
Les suspensions magnétiques permettent la lévitation d'un corps sans contact. Un mobile peut ainsi être déplacé à grande vitesse sans engendrer de frottement ni d'usure. Les applications de ces systèmes sont essentiellement circulaires (turbines, volant d'inertie, centrifugeuse, machine outils. . . ) mais peuvent ainsi être linéaires (train. . . ). Les suspensions magnétiques sont déjà utilisées dans l'industrie mais leur prix de revient, dû à l'asservissement de tous les degrés de liberté de la partie suspendue, freine leur expansion. L'étude porte sur les suspensions magnétiques dont une partie des degrés de liberté est contrôlé par des paliers autonomes à aimants permanents. Les associations de paliers permettant de réaliser une suspension sont décrites ainsi que les motorisations possibles et les systèmes d'amortissement. La réalisation d'un prototype a mis en évidence les avantages et les inconvénients d'une suspension ne possédant qu'un seul axe asservi
Les performances désormais intéressantes des supraconducteurs à haute température critique découverts dans les années 86/87 rendent possible l'étude et la réalisation de suspensions magnétiques supraconductrices stables totalement passives contrairement aux paliers magnétiques classiques. Les oxydes supraconducteurs sont des matériaux complexes, aussi pour optimiser les performances d'une suspension magnétique associant aimants permanents et supraconducteurs, il est nécessaire de réaliser de nombreuses caractérisations expérimentales. Différents paramètres ont été retenus : forces verticale et transversale essentielles pour la lévitation, courbe d'aimantation qui régit l'interaction magnétique, mais aussi les cartes de flux piégé qui permettent d'obtenir la répartition des courants macroscopiques et la structure granulaire des échantillons. Les échantillons supraconducteurs utilisés sont des composés d'YBaCuO élaborés sous champ magnétique au Laboratoire E. P. M. Pour développer des forces de lévitation importantes, il est nécessaire d'associer des pastilles supraconductrices à gros grains orientés et des structures d'aimants permanents à fort gradient de champ. Les forces de stabilisation transversale exigent des structures d'aimants permanents à fort gradient de champ transerval, un volume supraconducteur aimanté important et un refroidissement sous champ. Quelques simulations numériques simples ont permis de mieux comprendre l'influence des différentes structures d'aimants sur les supraconducteurs. Enfin, un premier dimensionnenement de suspension magnétique à structure hybride "dissociée" alliant très bonnes performances verticales et une stabilité transversale et la réalisation d'un coupleur Gagné tique supraconducteur utilisant les interactions magnétiques transversales entre supraconducteurs et des structures d'aimants ont conclu cette étude
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Wang, Chien-Chang, et 王建昌. « A study of the dynamic behavior of a passive micro magnetic suspension motor ». Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16146334589908260251.
博士 國立交通大學 材料科學與工程學系 99 The goal of this dissertation was to investigate the dynamic behaviours and the related effects of a proposed passive magnetic bearing (MB) motor. The concept of the bearing used the repulsive magnetic force to levitate the rotor in the radial direction by utilizing the sintered magnet (N45) with high energy product. Not only a mathematical model for the MB was proposed, which can predict the dynamic characteristics of the developed motor, but also a design procedure for fabricating the prototype was introduced. The mathematical model and the prototype points out that the micro magnetic bearing motor can be carried out on the basis of the developed theory and experiments. Beside the basic gyroscopic effect and rotor unbalance effect were observed, the interesting effects including damping effect, bias-magnetic force effect, and scaled-down effect were discussed one by one.
Regarding the damping effect, an innovative damping device consisting of a magnetic ring of high permeability and an annular rubber pad can apparently increase the anti-shock ability of the MB motor. Moreover, an approach of the vibration reduction utilizing an induced magnetic force was developed. In addition, a prototype of scaled-down MB motor (the outer magnet with an inner diameter of 5 mm, an outer diameter of 8 mm, and a height of 3.6 mm) was studied. Both the inner and outer part was comprised of a stack structure of high energy product magnet. These rings were arranged on the shaft above the PM of the rotor and the stator. From the experimental observation, the shaft can be rotated without any frictional contacts in radial direction. It shows that the micro magnetic bearing (MMB) demonstrates the lower friction torque loss in comparison with the conventional micro ball bearing (MBB). Moreover, the radial vibration of our device is 21 % lower than the conventional MBB type.
The research mentioned above was focused on the motor type with radial air gap. Finally, the dissertation gave the pre-study report regarding a study of axial vibration for a flat-type motor (axial air gap). The results indicate that axial pre-load apparently affects the axial vibration of the motor, and this will be a valuable reference for the research which will be aimed to study the system with the MMB.
Chapitres de livres sur le sujet "Passive magnetic suspension":
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Xu, Hao, Youcheng Han, Weizhong Guo, Mingda He et Yinghui Li. « Design and Analysis of a Novel Magnetic Adhesion Robot with Passive Suspension ». Dans Intelligent Robotics and Applications, 369–80. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-13822-5_33.
Eshkabilov, Sulaymon, Hamdam Jumaniyazov et Davron Riskaliev. « Simulation and Analysis of Passive vs. Magneto-Rheological Suspension and Seat Dampers ». Dans Lecture Notes in Mechanical Engineering, 269–79. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93587-4_28.
Actes de conférences sur le sujet "Passive magnetic suspension":
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Mizuno, Takeshi, Yusuke Hara et Kenji Araki. « Control System Design of a Repulsive Magnetic Bearing Stabilized by the Motion Control of Permanent Magnets ». Dans ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/movic-8413.
Abstract The control system of a magnetic bearing system using forces of repulsion between permanent magnets was designed on a state-feedback basis. In the treated magnetic bearing, the radial motions of the rotor were passively supported by repulsive forces and the axial motion was stabilized by active control. Stabilization was achieved by using the motion control of the permanent magnets for passive radial suspension; these magnets were driven by voice coil motors in the axial direction. Experimental results showed that the designed controllers achieved contactless levitation and adjusted the levitation characteristics effectively by the assignment of closed-loop poles.
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Ozawa, Yoshiki, Yusuke Fujii, Akira Chiba et Haruhiko Suzuki. « Novel Axial-Gap Bearingless PM Motor with Full-Passive Magnetic Suspension by Diamagnetic Disk ». Dans 2022 25th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2022. http://dx.doi.org/10.1109/icems56177.2022.9983088.
Choi, Benjamin, et Andrew Provenza. « Passive Fault Tolerance for a Magnetic Bearing Under PID Control ». Dans ASME Turbo Expo 2001 : Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0456.
NASA Glenn Research Center (GRC) has developed a Fault-Tolerant Magnetic Bearing Suspension rig to enhance the safety of the bearing system for multiple component failures. A simple proportional-integral-derivative (PID) controller with no fault detection mechanisms was tested in a passive way where the initial bias current and control gains for all the eight heteropolar poles were not changed for the remaining active poles in the fault situations. The action of the integral term in the controller generated autonomous corrective actions for the pole failures to return the rotor to the set point (middle position) after the failure transient. The system stability and control of the rotor position were maintained over the entire speed range, where the rotor passes through the rigid body critical speeds and other rotor disturbances, provided that there was sufficient position stiffness and damping at low speeds. As far as the summation of force vectors of two attracting forces and rotor weight is zero, the passive fault tolerance was successfully demonstrated by using as few as two active poles out of the eight independent poles from each radial bearing (that is simply, 12 out of 16 poles dead). The rotor was spun without losing stability or desired position up to the rig’s maximum allowable speed of 20,000 rpm.
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Zamora-Bolanos, J. D., Marta Vilchez-Monge, Gabriela Ortiz-Leon et J. L. Crespo-Marino. « Preliminary Design Methodology and Prototype of a Passive Magnetic Suspension System for a Blood Axial Flow Pump ». Dans 2018 IEEE International Work Conference on Bioinspired Intelligence (IWOBI). IEEE, 2018. http://dx.doi.org/10.1109/iwobi.2018.8464185.
Martynenko, Gennadii, et Yuriy Ulianov. « Combined Rotor Suspension in Passive and Active Magnetic Bearings as a Prototype of Bearing Systems of Energy Rotary Turbomachines ». Dans 2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES). IEEE, 2019. http://dx.doi.org/10.1109/mees.2019.8896571.
Fellah Jahromi, Ali, et A. Zabihollah. « Semi Active Vibration Control of a Passenger Car Using Magnetorheological Shock Absorber ». Dans ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24079.
A novel semi-active control system for suspension systems of passenger car using Magnetorheological (MR) damper is introduced. The suspension system is considered as a massspring model with an eight-degrees-of-freedom, a passive damper and an active damper. The semi-active vibration control is designed to reduce the amplitude of automotive vibration caused by the alteration of road profile. The control mechanism is designed based on the optimal control algorithm, Linear Quadratic Regulator (LQR). In this system, the damping coefficient of the shock absorber changes actively trough inducing magnetic field. It is observed that utilizing the present control algorithm may significantly reduce the vibration response of the passenger car, thus, providing comfortable drive. The new developed suspension system may lead to design and manufacturing of passenger car in which the passenger may not feel the changes in road profile from highly bumpy to smooth profile.
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Peng, Peng, Narayanan Ramakrishnan, Vijay Kumar et Brian Karr. « Experimental Study of the Resonances of the Slider Modulations by Laser Doppler Vibrometer ». Dans ASME 2014 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/isps2014-6984.
The magnetic spacing of Hard Disk Drives (HDD) needs to be reduced for increasing areal density. It is therefore very challenging to maintain constant fly height at a sub-2nm clearance. Any resonance of the slider or suspension can cause modulations on fly height and thus impacting the writing efficiency. Various research was carried out for the flying stability of the slider [1–4], especially in the off-track direction caused by voice coil motor (VCM) as well as PZT actuation. However, the resonances of the slider modulations in vertical direction have not been well researched. In the study, a method of using heater oscillation to examine the slider resonances has been proposed. The experiments have been performed on two suspension designs and two air bearing designs to demonstrate the effectiveness of this approach. The experimental results showed a shift of resonance frequencies due to a design change of the suspension. The air bearing design also played a role in the heater time constant and thus affecting the magnitude of resonances. Further, larger resonances were observed in a lower clearance setting than passive fly.
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Boggs, Christopher M., Fernando D. Goncalves et Mehdi Ahmadian. « Steady-State Energy Transfer of a Semi-Active Suspension Under Hybrid Control ». Dans ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59642.
Magnetorheological (MR) fluids are often characterized by their field-dependent yield stress. Upon the activation of a magnetic field, the fluid has the ability to change from a fluid state to a semi-solid state in milliseconds. The field-dependent yield stress and the fluid’s fast response time make MR fluid an attractive technology for many applications. One such application that has gained considerable attention is in MR fluid dampers. The real-time control possibilities make MR dampers attractive alternatives to conventional viscous dampers. In comparing passive dampers with MR dampers, an equivalent viscous damping coefficient is often found from the energy dissipated by the MR damper with a fixed current applied to the damper. In contrast, this study investigates energy dissipation of the MR damper under a semi-active hybrid control policy. Hybrid control is a linear combination of skyhook and groundhook control. This study investigates the system energy under steady-state conditions at three frequencies, and how the system energy varies with varying contributions from skyhook and groundhook. A quarter-car rig was used to evaluate the dynamics of the hybrid suspension using an MR damper. Previous studies have shown that hybrid control can offer advantages to both the sprung and unsprung masses; however the relationship between energy dissipation and performance is not clear. In this study, we compare control policy performance to several energy-based measures. Results indicate that there is a strong correlation between sprung mass RMS acceleration and unsprung mass RMS acceleration to several of the energy-based measures.
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Ivers, Douglas, et Douglas LeRoy. « Improving Vehicle Performance and Operator Ergonomics : Commercial Application of Smart Materials and Systems ». Dans ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5058.
This paper will discuss how controllable material technology, such as the use of active magneto-rheological (MR) dampers, improves vehicle primary and secondary suspensions. Although relatively new to the marketplace, semi-active suspensions in commercial automobiles and off-highway vehicles have been proven through the use of active MR dampers since 1998. In fact, MR suspension dampers are found today on the commercial vehicles of an increasing number of automotive OEMs and leading off-highway OEMs. MR fluid dampers are simple in design and have the advantage of no moving parts. The resistive force from an MR damper is generated as iron particles, suspended in the magneto-rheological fluid (MR fluid); pass through a magnetic field controlled by the electrical current passing through an electric coil contained within a moving piston surrounded by fluid. By adjusting the current to the damper coil in response to feedback from vehicle sensors and a controller, the damping response of the suspension can be optimized and controlled in real time to provide optimal operator comfort. The MR Damper System has a full-scale step response of less than 10 milliseconds. Sophisticated control algorithms adapt to large changes in payload, enabling the vehicle to meet ride metrics without pneumatic load leveling. Other benefits of the MR damping system include higher speed in NATO double-lane change tests, reduced risk of roll-over, improved accuracy of mounted weapons, and improved vehicle durability and readiness.
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Song, Xubin, Mehdi Ahmadian, Steve Southward et Lane Miller. « Simulation Study of Adaptive Magneto-Rheological Seat Suspension ». Dans ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59588.
This paper describes the details of the simulation analysis of a nonlinear model-based adaptive suspension control system[1, 2]. The numerical aspect of the simulation study of a seat suspension with application of magneto-rheological dampers will be presented. Magneto-rheological (MR) dampers have strong nonlinearities such as bi-linearity, hysteresis, and saturation related to magnetism, which can be represented by appropriate mathematic functions, respectively. Thus the model-based adaptive algorithm becomes complicated because of involvement of MR damper models. One objective of this study is to investigate the effect of MR damper model simplifications on the adaptive suspension performance. Furthermore, simulation is also applied to do parametric study of adaptive algorithm parameters such as filtering and step size. The simulation results compare the proposed adaptive controller with passive dampers to validate not only its effectiveness but also obtain some guidance information for its experimental implementation.
