Virtual Reality Simulation of a Full Car Active Suspension System with Nonlinear Energy Sink Controller

摘要：

This paper presents the design of a Nonlinear Energy Sink(NES)controller and its application to active suspension systems in the Virtual Reality Environment.In this environment,the design engineers are immersed in an audio-visually coupled tele-operated environment whereby direct interaction with and control of the design process is achieved in real time.In this manner,the behavior of synthetic models of the full car can be monitored by literally walking around the car and adjusting the design parameters of the suspension as needed to ensure optimal performance while satisfying design and operational requirements.The control actuators which provide forces equivalent to nonlinear stiffness and damping elements are attached to the vehicle in order to actively isolate it from road excitation.The effect of the parameters of the NES controller on the vehicle performance is studied both in the frequency and time domain.The effectiveness of the NES controller is validated by numerical simulation.The robustness of the nonlinear energy pumping process is studied by varying the magnitude of road excitation.The simulation results in the Virtual Reality Environment show that under certain conditions,the nonlinear energy pumping can be induced and significant vibration isolation can be achieved.The performance of vehicle including the ride comfort and road holding capability can be improved significantly.When the magnitude of road excitation is increased,the capacity of the NES to absorb energy from the main system is also enhanced.This is very important to achieve vibration isolation objectives.The virtual reality simulation results also show that the nonlinear NES controller performs better than the classical LQR controller particularly as the road condition becomes worst.

关键词： Design in virtual reality environment nonlinear energy sinks LQR controllable suspension control strategy

作者: J. Smoker A. Baz L. Zheng

作者单位: Department of Mechanical Engineering,University of Maryland,College Park,MD 20742,USA State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,P.R.China

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）