磁流变半主动悬架变负载MRAC控制
MRAC of magnetorheological semi-active suspension with variable loads
胡国良 1方冰 1喻理梵 1张佳伟 1朱文才1
作者信息
- 1. 华东交通大学机电与车辆工程学院,江西南昌 330013
- 折叠
摘要
针对车辆负载变化影响车辆综合性能的不确定性问题,建立了包含负载力的1/4车辆半主动悬架数学模型.选用磁流变阻尼器作为半主动部件,采用模型参考自适应控制(MRAC)衰减振动,运用李雅普诺夫定理证明了该系统的稳定性.以车身加速度、悬架动行程和轮胎动载荷的均方根值为评价指标,进行了变负载工况下的仿真分析.结果表明,在随机路面激励下,基于MRAC的磁流变半主动悬架在空载、负载1 kN和负载2 kN的情况下,悬架的3个性能指标与被动悬架相比均得到明显优化.
Abstract
In response to the uncertainty problem of load change affecting the performance of the vehicle,a mathematical model of quarter vehicle semi-active suspension containing load force is established.Magnetorheological(MR)damper is a-dopted as the semi-active component,and model-referenced adaptive control(MRAC)is used to attenuate the vibration,and the stability of the system is proved by Liapunov's theorem.The simulation analysis under variable loads was carried out u-sing the root mean square values of body acceleration,suspension displacement and tire dynamic load as evaluation indexes.The results show that under random road excitation,the three performance indexes of the MRAC-based suspension are signif-icantly reduced compared with the passive suspension under zero load,1kN load and 2kN load,respectively.
关键词
半主动悬架/磁流变阻尼器/模型参考自适应控制(MRAC)/李雅普诺夫函数Key words
semi-active suspension/MR damper/MRAC/Lyapunov function引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据