摘要
建立1/4车辆非线性悬架模型,分别设计非线性悬架系统的最优控制器和模糊控制器,提出一种具有耦合环节,最优控制与模糊控制并联结合的复合控制策略。该复合控制策略能实现不同控制方法优势互补,提高悬架系统的控制性能。仿真结果表明,在不同车速和等级道路行驶工况条件下,相比单一控制方法,该复合控制策略具有更好的控制效果,在提高车辆行驶平顺性和操纵稳定性方面具有明显优势。研究结果为汽车悬架系统的控制策略研究提供了一定的理论方法参考。
A dynamical model of a nonlinear quarter vehicle is built, and an optimal controller and a fuzzy controller are designed for controlling nonlinear vehicle suspension system respectively; furthermore, a parallel hybrid control strategy with coupled rule is presented, which consists of optimal controller and fuzzy controller. This hybrid control method can realize complementary advantages of two controllers, and enhance the control performances of suspeusion system. Simulation results demonstrate that under the driving cycles with various grade roads and vehicle speed, the hybrid control method has better control effect and shows more ascendant in improving the ride comfort and safety of vehicle than a single control method. The research provides a theoretic reference far exploring the control methods of vehicle suspension system.
出处
《机械设计与制造》
北大核心
2014年第4期85-88,共4页
Machinery Design & Manufacture
基金
广西自然科学基金项目(2013GXNSFAA019351
2010GXNSFA013024)
广西教育厅科研项目(201202ZD068
201204LX657)
关键词
非线性悬架系统
最优控制
模糊控制
复合控制
Nonlinear Vehicle Suspension
Optimal Control
Fuzzy Control
Hybrid Control
