摘要
为解决目前纵向运动控制系统通常采用的电子真空助力器(EVB)响应速度较慢的问题,设计了一种基于高速开关阀的电控汽车辅助制动系统。采用脉宽调制(PWM)方法对高速开关阀进行控制,然后对开环系统进行辨识,在辨识模型基础上设计PI控制器实现对制动压力的控制。试验结果表明:该系统的稳态误差小于0.1MPa,响应时间小于0.2s;该系统具有安装方便、与原制动系统可以很好兼容的优点。
A high-speed on/off valve based electronically assisted braking system was developed to promote the response of the normally used electronic vacuum booster EVB in vehicle longitudinal motion control system. Pulse width modulation PWM method was used to control the high-speed on/off valve. An open loop model of the system was used to design a PI controller to control the braking pressure. Tests show that the system stable error is less than 0.1 MPa and response time is less than 0.2 s. The braking system is also easy to fix and is compatible with earlier braking systems.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第11期1532-1535,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家"十五"科技攻关项目(2002BA404A21)
关键词
纵向控制
制动
脉宽调制(PWM)
高速开关阀
longitudinal control
brake
pulse width modulation PWM
high-speed on/off valve
