摘要
以2自由度1/4车辆的悬架动力学模型为研究对象,通过H∞控制方法,应用频率加权函数对系统的输出性能进行必要的整型,可以明显提高系统性能;由系统对随机路谱和确定性路谱的响应分析可知,H∞控制使得悬架系统的性能得到较大的提高,在人体敏感频带内车身加速度水平得到了显著的降低。此外,在选择同样加权函数的情况下,H∞控制与H2控制进行了比较,并分析了两种控制的各自特点和优势所在。
The paper deals with single-wheel suspension car model.The aim is to prove the benefits of controlled(active) suspensions compared to passive ones by selection of performance weighting function.The contribution relies on H_∞ control design to improve human comfort under acceleration at 4-8 Hz and road holding of the car under performance(specifications),and on control validation through simulation on the condition of stochastic road profile and deterministic(disturbance).In addition,with the same frequency weighting function,analysis is made by comparison of two control(approaches),H_∞ and H_2,which shows different traits and different superiority.
出处
《振动与冲击》
EI
CSCD
北大核心
2006年第1期146-149,158,共5页
Journal of Vibration and Shock
基金
高等学校博士学科点专项科研基金资助
项目编号(20020248042)
关键词
主动悬架
H∞控制
H2控制
频率加权函数
active suspension,H_∞ control,H_2control,frequency weighting function
