摘要
针对车辆座椅悬架系统,建立电控空气弹簧悬架座椅系统的车辆-座椅三自由度物理模型和数学模型,以路面信号为激励源,应用随机线性二次型最优控制理论(LQG),根据系统性能要求选取合适的频率加权系数,设计出控制系统的最优反馈规律,并在MATLAB中对该模型进行仿真。结果表明:这种控制策略对路面激励通过车辆系统传递到驾驶员座椅的振动控制具有更好的适应性,能有效降低驾驶员所承受的垂直振动加速度。
The 3-DOF physical model and mathematical model of a vehicle and seat air-spring suspension system were built. Based on the linear stochastic optimal control theory （ LQG）, the signal of road＇s output was used as excitation source to design the optimal law of this feedback control system. The model was simulated in MATLAB. The results show that the control strategy on the road excitation system has a good applicability on control the vibration passed to the driver＇s seat through the vehicle and it can effectively reduce the vertical vibration acceleration which is passed to drivers.
出处
《机床与液压》
北大核心
2011年第23期45-47,50,共4页
Machine Tool & Hydraulics
关键词
座椅
空气悬架
LQG控制
仿真
Seat
Pneumatic suspension
LQG control
Simulation
