基于遗传算法和H_∞控制的悬架系统集成设计

Integrated Structure-Control Design for a Suspension System Based on Genetic Algorithm and H_∞ Control

现代设计思想的发展使人们不再满足于只在已有的系统或结构不符合性能要求时设计控制器 ,而是在设计系统或结构的同时 ,考虑它们与控制器的集成优化设计问题。针对传统半主动悬架先设计其机械结构参数后设计控制器 ,易造成系统失去全局最优性能的特点 ,提出了一种基于遗传算法和 H∞ 控制的集成设计半主动悬架机械结构参数和控制参数的方法。理论分析、仿真计算和试验结果均表明 :此方法与传统优化设计方法相比 ,对降低汽车振动、提高汽车行驶平顺性和安全性具有较好的效果。

The development of modern design thought has made people not be satisfied with designing a controller only when existing system or structure does not meet the performance requirements. It is to considered to design the integrated system of structure-controller at the beginning of the design. Because traditional design methods of vehicle semi-active suspension systems always determine the control parameters following structure parameter, which can not obtain a global optimum performance for the system. This paper presents an approach to design the parameters of the semi-active suspension system by integrating its mechanical structure and control parameters based on genetic algorithm and H ∞ control scheme. The effectiveness of the proposed integrated optimization method to improve riding and safety is verified by theoretical analysis, simulation and experimental results.