摘要
以配置四个磁流变阻尼器的整车悬架为控制对象,提出顶层最优控制与底层模糊控制相结合的最优模糊控制思想。首先由整车悬架随机最优控制获得4对期望的控制力,再通过模糊控制器使各磁流变阻尼器的反力逼近这4对控制力,从而实现对整车悬架的振动半主动控制。仿真研究表明,最优模糊控制的控制效果明显优于现有的开关最优控制,特别是对簧载质量的垂直加速度、俯仰角加速度以及悬架动挠度抑制效果明显,可不同程度改善车辆的行驶平顺性和操纵稳定性。
The study focuses on a semi-active control of two steps to isolate the vibration of a full vehicle suspension with 4 MR （Magneto-Rheological） dampers installed between the vehicle bodywork and four un-sprung masses, The first step is to design 4 pairs of control forces through independently designing the LQG control and Kalman filter. And the second step is to make the 4 pairs of restoring forces of those MR dampers approach to the 4 pairs of control forces by using the fuzzy control. The numerical simulations demonstrate the better performance of the optimal fuzzy control in the semi-active vibration control of the full vehicle suspension compared with the current clipped-optimal control. For instance, the optimal fuzzy control works effectively in reduction of the vertical acceleration and the roll angular acceleration of the vehicle body, as well as the dynamic Deflection of the suspension, such that the vehicle receives better ride comfort and handling stability. The fuzzy controller is quite easy to be realized on line as the design of the fuzzy controller is independent of the optimal control law of the suspension. Furthermore, it can also be combined with other control strategies, and extended to other applications of MR dampers.
出处
《振动工程学报》
EI
CSCD
北大核心
2005年第4期438-442,共5页
Journal of Vibration Engineering
基金
国家自然科学基金重点资助(50135030)
关键词
磁流变阻尼器
整车悬架
半主动控制
模糊控制
LQG控制
MR damper
suspension of full-vehicle model
semi-active control
fuzzy control
LQG control
