摘要
为了消除汽车底盘集成系统机械与控制系统间的耦合,首先建立了汽车悬架与转向系统整车动力学模型,分别设计了主动悬架(ASS)LQG控制器和主动前轮转向系统(AFS)滑模变结构控制器和两系统的规则协调控制器。以集成系统机械与控制参数为优化变量,以反映汽车动力学综合性能为目标函数,基于遗传算法编制了集成优化程序,对集成控制系统进行了优化仿真计算。仿真结果表明:汽车底盘集成控制系统经过参数优化后,汽车综合性能得到改善:汽车的横摆角速度、车身侧向加速度均方根值分别降低了近34%,38.12%,车身俯仰角速度降低了4.91%、改善了车辆的乘坐舒适性,方向盘操纵转矩大大降低,提高了汽车转向时的转向轻便性。
In order to remove the coupling interferences between the mechanical structure and control system of vehicle chassis control system and further enhance the overall performance of vehicle, the method of simultaneous optimization design of mechanical structure and controller of vehicle chassis system based on genetic algorithm was presented. The integrated simuhaneous optimization program was developed based on genetic algorithm in MATLAB environment while the mechanical structure and control parameters of integrated control system was set as optimization variables and the overall performance of automotive dynamic was set as objective function. Simulation result not only apparently improves ride performance and vehicle handiness, but effectively reduces the vibration caused by road inputs in order to get well vehicle maneuverability and ride comfort as well.
出处
《机械设计与制造》
北大核心
2015年第3期47-50,共4页
Machinery Design & Manufacture
基金
国家自然基金资助(61104225)
福建省自然科学基金资助(2013J01208)
福建省教育厅A类项目(JA12251)
厦门理工学院科技项目(YKJ11007R)
关键词
遗传算法
主动悬架系统
主动前轮转向系统
协调控制
集成优化
Genetic Algorithm
Active Suspension System
Active Front Steering System
Coordinated Control
Sim-ultaneous Optimization
