直线电机馈能悬架半主动控制特性的仿真分析  

Simulational analysis of semi-active control characteristics of energy-regenerative suspension with linear motor

作　　者：汪若尘[1] 钱金刚 施德华[1] 郗欢欢[2] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]山东理工职业学院汽车工程学院,山东济宁272000

出　　处：《广西大学学报（自然科学版）》2015年第5期1102-1108,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50905078);江苏省自然科学基金项目(BK2012714);江苏省高校优势学科建设工程资助项目

摘　　要：针对被动悬架无法兼顾不同路面乘坐舒适性与行驶安全性,而主动悬架能耗高的问题,提出了一种半主动馈能悬架。首先通过分析馈能回路工作特性,确定了半主动馈能悬架系统中直线电机电磁阻尼力的工作区域;随后采用线性最优控制(LQG)策略,探究了直线电机的最优工作点,分析了半主动控制特性的影响因素;最后根据半主动馈能悬架的控制特性,设计了半主动控制策略,控制效果接近LQG主动控制。同时还分析了不同型号直线电机式半主动馈能悬架的馈能特性,当选定蓄电池端电压为36 V时,车身加速度均方根值较传统被动悬架降低了12.3%,即半主动馈能悬架的乘坐舒适性优于传统被动悬架;而蓄电池的充电功率为20.48 W,馈能效率为44.75%,回馈的能量可用于车辆其他电气设备,从而降低整车能耗。Semi-active regenerative suspension is proposed to solve the problem that the passive sus- pension cannot obtain a good balance between riding comfort and driving safety on different roads and the active suspension consumes high energy. Firstly, by analyzing the working characteristic of the regenerative circuit, the working interval of electromagnetic damping force of the semi-active re- generative suspension system was decided. Then, the optimal working point is studied by using line- ar quadratic Gaussian distributed control（LQG） strategy, and influencing factors of the semi-active control characteristic are analyzed. Finally, the semi-active control strategy is designed according to the control characteristic of a semi-active regenerative suspension. And control effect of the semi-ac- tive control strategy is approximate to LQG active-control strategy. Meanwhile, regenerative characteristics of semi-active regenerative suspensions with different linear motors are analyzed. When volt- age of the storage battery is 36 V, acceleration of vehicle body decreases by 12. 3% compared with the traditional passive suspension. It means that ride comfort of the semi-active regenerative suspension is better than traditional passive suspension. Charging power of the storage battery is 20.48 W and regeneration efficiency is 44.75%. The regenerated energy can be used to power other electric equipment on the vehicle so that vehicle energy consumption can be reduced.

关 键 词：直线电机 馈能悬架 半主动控制 最优控制 

分 类 号：U463.33[机械工程—车辆工程]