摘要
为提高汽车乘坐舒适性和操纵稳定性，以二自由度非线性悬架系统为研究对象，以车身垂直加速度和悬架动挠度为控制量，设计非线性悬架系统的分数阶PI^λD^u控制器，通过遗传算法获取分数阶PI^λD^u控制器最优整定参数，仿真结果表明，在多种行驶工况下，分数阶PI^λD^u控制比整数阶PID控制具有更加灵活的调节性能，能明显改善悬架综合性能，有效提高汽车行驶的平顺性和稳定性，为非线性主动悬架控制提供一种新方法．
In order to improve the ride comfort and safety of vehicle, a dynamical model of a nonlinear quarter vehicle is built and an optimal fractional-order PIλDμcontroller based on genetic algorithm is designed to control the nonlinear vehicle suspension system in this paper. Simulation results demonstrate that under the driving cycles with various grade roads and vehicle speed, the fractional-order PIλDμcontrol method has better control effect and shows more ascendant in improving the ride comfort and safety of vehicle than the classical PID control method. The research provides a theoretic reference for exploring the control methods of vehicle suspension system.
出处
《广西科技大学学报》
2015年第4期42-48,共7页
Journal of Guangxi University of Science and Technology
基金
广西自然科学基金项目(2013GXNSFAA019351)资助
关键词
非线性悬架
分数阶PI^λD^u控制
最优控制
遗传算法
nonlinear vehicle suspension
fractional order PIλDμ control
optimal control
genetic algorithm
