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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):323-330
A discussion in terms of dynamic properties of a magnetorheological damper is lead to those in the denoted paper. Results of experimental evaluation of the properties of a commercially available magnetorheological damper are presented. A possibility of use of the damper in practical applications is also considered. 相似文献
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永磁调节式磁流变阻尼器具有不需电源和阻尼力可调的优点。该文通过试验研究了该磁流变阻尼器的力学性能,针对长沙浏阳河大桥拉索振动问题,提出了永磁调节式磁流变阻尼器拉索减振方案。现场减振试验和实际应用结果表明,该阻尼器具有很好的减振效果。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):341-360
Summary This paper presents an investigation of the feedback control performance of a full-vehicle suspension system featuring magnetorheological (MR) dampers. A cylindrical MR damper is designed and manufactured by incorporating a Bingham model of aMR fluid which is commercially available. After evaluating the field-dependent damping characteristics of the MR damper, a full-vehicle suspension system installed with 4 independent MR dampers is constructed and its governing equations of motion which include vertical, pitch and roll motions are derived. A H 8 controller which has inherent robustness against system uncertainties is formulated by treating the sprung mass of the vehicle as uncertain parameter. This is accomplished by adopting the loop shaping design procedure. For the demonstration of a practical feasibility, control performance characteristics for vibration suppression of the proposed MR suspension system are evaluated under various road conditions through the hardware-in-the-loop simulation (HILS) methodology. 相似文献
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Seung-Bok Choi Hwan-Soo Lee Young-Pil Park 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2002,38(5):341-360
Summary This paper presents an investigation of the feedback control performance of a full-vehicle suspension system featuring magnetorheological (MR) dampers. A cylindrical MR damper is designed and manufactured by incorporating a Bingham model of aMR fluid which is commercially available. After evaluating the field-dependent damping characteristics of the MR damper, a full-vehicle suspension system installed with 4 independent MR dampers is constructed and its governing equations of motion which include vertical, pitch and roll motions are derived. A H 8 controller which has inherent robustness against system uncertainties is formulated by treating the sprung mass of the vehicle as uncertain parameter. This is accomplished by adopting the loop shaping design procedure. For the demonstration of a practical feasibility, control performance characteristics for vibration suppression of the proposed MR suspension system are evaluated under various road conditions through the hardware-in-the-loop simulation (HILS) methodology. 相似文献
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汽车磁流变半主动悬架的控制研究 总被引:6,自引:0,他引:6
为了改善汽车的乘坐舒适性和行驶安全性,提出了一种汽车磁流变半主动悬架的控制策略。首先,设计了磁流变减振器的工作模式,通过试验获得了其速度特性和力学特性,建立了磁流变减振器的数学模型;其次,建立了带磁流变减振器的二自由度车辆简化模型及其参数表;最后,基于双环控制理论,设计了一种控制系统,其外环产生理想的结构阻尼力,内环调节电流驱动器的电流,以使磁流变减振器实时地产生控制阻尼力。仿真结果表明:以磁流变减振器为基础,通过半主动控制技术,悬架系统的振动动态性能得到了有效的控制。 相似文献
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磁流变减振器阻尼力和电流的精确控制是实现半主动悬架的算法、达到整车系统控制目标的必要条件,但由于磁流变液的温度敏感性使得磁流变减振器阻尼力强烈依赖温度变化,带来模型失配和控制效果弱化的问题。基于此进行磁流变减振器在不同电流和速度下的高低温(-40℃~80℃)示功试验研究,揭示磁流变减振器在低温下丧失阻尼特性而表现出刚度特性,在高温下黏滞阻尼退化的特性规律。为了描述磁流变减振器随温度变化的复杂非线性特性,提出一种新的磁流变减振器变温参数化双曲滞回模型,该模型引入温度作为自变量,对磁流变减振器黏滞阻尼、刚度及滞回特性进行准确描述。为了面向实际减振器控制,在此双曲滞回模型的基础上,进一步线性化求逆得到磁流变减振器温度修正的逆模型。该逆模型输入预期阻尼力和减振器压缩速度作为自变量,可以直接给出满足减振器力值约束的控制电流。研究结果表明:相较于未进行温度补偿的逆模型,该逆模型能够平均提升12.79%的电流控制精度以及12.53%的控制力跟踪精度;进行温度修正的模型能够在仿真中还原更真实的磁流变减振器力学特性,逆模型能够给出更精确的控制电流,为充分发挥磁流变减振器的能力、实现车辆的半主动悬架精确控... 相似文献
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采用Lagrange方程建立了磁流变式调谐液柱阻尼器(MR-TLCD)与桥梁单自由度扭转耦合结构的动力学模型,依据试验数据把磁流变液阻尼器简化成Bingham模型并采用等效线性化处理。在简谐荷载激励情况下,在时域和频域内优化了随输入电流值变化的4种截面MR-TLCD的参数;在随机风荷载激励情况下,进一步评估了优化后的MR-TLCD对桥梁风致扭转振动的控制效果。结果表明:这4种MR-TLCD都存在相应的最小平均动力放大系数比,且截面面积越大对应的最优电流值越大,平均动力放大系数比越小;扭转角位移峰值减小了43.9%,扭转加速度减小了41.1%。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):297-312
In this paper, a load-leveling suspension system with a magnetorheological (MR) damper is investigated. In this suspension system, the MR damper is connected to a spring to form a load-leveling suspension system. The system effective stiffness and damping can be adjusted by controlling the MR damper. The characteristics of a load-leveling suspension system are studied first. When the linear damper is replaced with an MR damper, the averaging method is adopted to obtain the steady-state response of the nonlinear system. A comparison demonstrates that the results of the averaging method are in good agreement with those obtained by numerical simulations. The analytical results are then verified experimentally. The load-leveling suspension system studied here is able to adjust both suspension stiffness and damping and, hence, it may provide more effective vibration control in a wider frequency range, when the damper is controlled. 相似文献
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Y. Shen M. F. Golnaraghi G. R. Heppler 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(4):297-312
In this paper, a load-leveling suspension system with a magnetorheological (MR) damper is investigated. In this suspension system, the MR damper is connected to a spring to form a load-leveling suspension system. The system effective stiffness and damping can be adjusted by controlling the MR damper. The characteristics of a load-leveling suspension system are studied first. When the linear damper is replaced with an MR damper, the averaging method is adopted to obtain the steady-state response of the nonlinear system. A comparison demonstrates that the results of the averaging method are in good agreement with those obtained by numerical simulations. The analytical results are then verified experimentally. The load-leveling suspension system studied here is able to adjust both suspension stiffness and damping and, hence, it may provide more effective vibration control in a wider frequency range, when the damper is controlled. 相似文献
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利用非线性反馈控制悬架系统的混沌行为 总被引:2,自引:0,他引:2
基于磁流变减振器的汽车悬架系统具有明显的滞后非线性,这直接导致了系统存在分岔与混沌的可能性。分析了悬架系统在路面单频正弦激励下的受迫振动,揭示了该系统存在混沌运动可能性。在此基础上,利用非线性反馈控制方法对这类混沌行为进行了控制,并采用Melnikov方法确定该控制系统的增益系数。 相似文献
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应用于汽车减振的磁流变液阻尼器的设计原理 总被引:6,自引:0,他引:6
应用智能材料磁流变液(MR)构造出的半主动悬架减振系统,可以用于对车辆振动的控制。MR流体具有的独特性质在于:在强磁场的作用下,可由牛顿流体变为粘塑流体,而变液阻尼器则具有结构简单、体积小、工作连续可逆,能耗小等优点。本文介绍了磁流变液的材料特性,建立了磁流变液阻尼器的阻尼力数学模型,并提出设计变阻尼器时参数的选取原则。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):600-626
In this paper, semi-active H∞ control with magnetorheological (MR) dampers for railway vehicle suspension systems to improve the lateral ride quality is investigated. The proposed semi-active controller is composed of a H∞ controller as the system controller and an adaptive neuro-fuzzy inference system (ANFIS) inverse MR damper model as the damper controller. First, a 17-degree-of-freedom model for a full-scale railway vehicle is developed and the random track irregularities are modelled. Then a modified Bouc–Wen model is built to characterise the forward dynamic characteristics of the MR damper and an inverse MR damper model is built with the ANFIS technique. Furthermore, a H∞ controller composed of a yaw motion controller and a rolling pendulum motion (lateral motion+roll motion) controller is established. By integrating the H∞ controller with the ANFIS inverse model, a semi-active H∞ controller for the railway vehicle is finally proposed. Simulation results indicate that the proposed semi-active suspension system possesses better attenuation ability for the vibrations of the car body than the passive suspension system. 相似文献