Response of a half-car model with optimal magnetorheological damper parameters
TL;DR: It is observed that the MR damper suspension systems with optimal parameters perform an order of magnitude better than the passive suspension and perform as well as active suspensions with limited state feedback, and closer to the performance of fully active suspensions.
Abstract: In this paper, control of the stationary response of a half-car model with a magnetorheological (MR) damper moving over a random road is considered. The MR damper is characterized using Bingham and...
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01 Jan 2017
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3 citations
Cites methods from "Response of a half-car model with o..."
...proposed a modified multi-objective optimization technique for a half-car model with MR dampers moving over a random road [45]....
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22 May 2020
TL;DR: In this paper, a comparison of the effectiveness of operation of mono-tube hydraulic shock absorbers of modified designs with a shock absorber of classical construction is presented, enabling the testing of the effect of various oil flow control strategies on the system dynamic responses.
Abstract: The paper is a comparison of the effectiveness of operation of mono-tube hydraulic shock absorbers of modified designs with a shock absorber of classical construction. A non-linear model of the system was developed, enabling the testing of the effect of various oil flow control strategies on the system dynamic responses. Damping characteristic have been determined, which - with appropriate selection of parameters - depends on the amplitude and the frequency of excitation. The effect of harmonic excitation of variable amplitude and frequency on selected characteristics of driving comfort and safety was examined in numerical simulations carried out for a quarter-car model of a vehicle. The results of numerical analyses have shown high effectiveness of operation of modified shock absorbers.
2 citations
01 Jan 2019
TL;DR: In this article, the performance of the vehicle is defined by considering the criteria of ride comfort, and mathematical models are proposed for studying the ride comfort of the car, and the transmissibility ratio versus frequency graph is plotted and the trend was compared with the theoretically obtained curves to validate the model.
Abstract: The performance of the vehicle is defined by considering the criteria of ride comfort. Mathematical models are proposed for studying the ride comfort of the car. In this study, the quarter-car model and half-car model are developed for all-terrain vehicle (ATV), and the sinusoidal excitation is taken as most of the bumps on the off-road are in the form of sinusoidal function, and therefore, results are discussed. Data were filtered using a Butterworth filter, and power spectrum analysis was done in MATLAB. Subsequently, the transmissibility ratio versus frequency graph was plotted, and the trend was compared with the theoretically obtained curves to validate the model. Further, composite weighted level, maximum transient vibration, and fourth power vibration dose were calculated using the weighting factor defined in ISO 2631-4: 2001.
1 citations
TL;DR: For the seismic design of structures in which the respective supports are located at long distances from each other, the assumption of uniform ground motion may be inadequate as discussed by the authors, and the assumption may not be adequate.
Abstract: For the seismic design of structures in which the respective supports are located at long distances from each other, the assumption of uniform ground motion may be inadequate. In this study...
1 citations
Dissertation•
01 Jan 2015
TL;DR: In this article, the influence of semi-active MR(Magneto rheological) damper using the quarter and half car models, and discuss about the nonlinear characteristics of passive oil damper with half car model.
Abstract: Comfort performance of any vehicle depends on the dynamic characteristics of dampers. In this thesis, we analyze the influence of semi-active MR(Magneto rheological) damper using the quarter and half car models, and discuss about the nonlinear characteristics of passive oil damper using half car model. The vehicle suspension of quarter car model with MR damper is considered while the vehicle is traveling at constant speed on random road profile. The hysteretic behavior of the MR damper is characterized using modified Bouc-Wen model. Using equivalent linearization technique hysteretic behavior of MR damper is linearized and used in the state space form. Subsequently, the rms values of system response characteristics such as sprung mass acceleration, suspension stroke, road holding and control force verses vehicle velocity are obtained by solving matrix lyapunov equation in time domain. The system responses in term of above parameters are computed for the parameters related with MR damper at different current which are obtained from the experimental conducted in our group. It is found that as the current in MR damper increases, the control force also increases, thus, reducing the suspension stroke and road holding. However, the sprung mass acceleration is increases, which reduces the comfort. Hence, optimal application of current has to be used to actuate MR damper for a given disturbance. Similarly, we also analyzed the system response of front and rear suspension system using the half-car model. We obtain the similar characteristics as that in quarter car model.
1 citations
References
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Book•
01 Jan 2001
TL;DR: This text provides an excellent introduction to the use of evolutionary algorithms in multi-objective optimization, allowing use as a graduate course text or for self-study.
Abstract: From the Publisher:
Evolutionary algorithms are relatively new, but very powerful techniques used to find solutions to many real-world search and optimization problems. Many of these problems have multiple objectives, which leads to the need to obtain a set of optimal solutions, known as effective solutions. It has been found that using evolutionary algorithms is a highly effective way of finding multiple effective solutions in a single simulation run. · Comprehensive coverage of this growing area of research · Carefully introduces each algorithm with examples and in-depth discussion · Includes many applications to real-world problems, including engineering design and scheduling · Includes discussion of advanced topics and future research · Features exercises and solutions, enabling use as a course text or for self-study · Accessible to those with limited knowledge of classical multi-objective optimization and evolutionary algorithms The integrated presentation of theory, algorithms and examples will benefit those working and researching in the areas of optimization, optimal design and evolutionary computing. This text provides an excellent introduction to the use of evolutionary algorithms in multi-objective optimization, allowing use as a graduate course text or for self-study.
12,134 citations
TL;DR: In this article, a model for controllable fluid dampers is proposed that can effectively portray the behavior of a typical magnetorheological (MR) damper and compared with experimental results for a prototype damper.
Abstract: Semiactive control devices have received significant attention in recent years because they offer the adaptability of active control devices without requiring the associated large power sources. Magnetorheological (MR) dampers are semiactive control devices that use MR fluids to produce controllable dampers. They potentially offer highly reliable operation and can be viewed as fail-safe in that they become passive dampers should the control hardware malfunction. To develop control algorithms that take full advantage of the unique features of the MR damper, models must be developed that can adequately characterize the damper's intrinsic nonlinear behavior. Following a review of several idealized mechanical models for controllable fluid dampers, a new model is proposed that can effectively portray the behavior of a typical MR damper. Comparison with experimental results for a prototype damper indicates that the model is accurate over a wide range of operating conditions and is adequate for control design an...
1,897 citations
"Response of a half-car model with o..." refers methods in this paper
...In the parametric approach, the MR damper has been modeled using the Bingham model, the viscoelastic-plastic model, the Bouc–Wen and modified Bouc–Wen models (Spencer et al., 1997) etc. and the model parameters are estimated experimentally by matching the experimental behaviour with model behaviour....
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...In the parametric approach, the MR damper has been modeled using the Bingham model, the viscoelastic-plastic model, the Bouc–Wen and modified Bouc–Wen models (Spencer et al., 1997) etc....
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TL;DR: A type of force generator which can respond to general feedback signals from a vibrating system in order to control the vibration but which does not require the power supply of a servomechanism is described.
Abstract: A type of force generator which can respond to general feedback signals from a vibrating system in order to control the vibration but which does not require the power supply of a servomechanism is described. Computer simulation studies show that performance comparable to that of fully active vibration control systems can be achieved with the semi-active type of device. Physical embodiments of the concept are discussed and compared to hardware used in active and passive vibration control systems.
1,315 citations
"Response of a half-car model with o..." refers background in this paper
...Karnopp et al. (1974) were the earliest to propose semi-active suspension systems as alternatives to active suspension systems....
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459 citations
"Response of a half-car model with o..." refers methods in this paper
...In the nonparametric approach, the MR damper is modeled by combining a series of differential equations that realize the dynamic behaviour of the MR damper (Choi et al., 2001; Song et al., 2005)....
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TL;DR: In this article, a semi-active control of vehicle suspension system with magnetorheological (MR) damper is presented and performance testing is done for this damper with INSTRON machine.
449 citations
Additional excerpts
...MR dampers have also been used in vehicle suspension systems as semiactive devices by a number of authors (Ahmadian and Pare, 2000; Liao and Lai, 2002; Yao et al., 2002; Du et al., 2005; Sassi et al., 2005; Tusset et al., 2009; Crews et al., 2011)....
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