基于BJ212半主动悬挂的可控性与可观测性

The Controllability and Observadility of Suspension System of BJ212

车辆的振动是影响车辆性能的重要因素 ,它不仅影响了车辆的行驶平顺性 ,而且对车辆的操纵稳定性及汽车零部件的疲劳寿命有着较大的影响 ,进而也影响了车辆的行驶安全性。传统的被动悬架在减小车辆振动方面已受到很大限制。为了进一步提高车辆悬架系统的减振能力 ,近年来人们开展了对非被动悬挂的研究 ,用电子控制方法提高车辆悬挂系统的性能。本文从建立 BJ2 1 2越野车悬挂系统二自由度四分之一模型着手 ,用现代控制理论中的状态空间法对车辆悬挂系统的可控性与可观测性进行了分析 ,得出了该车悬挂系统是既可控又可观测的结论。由于该车半主动悬挂系统是既可控又可观测的 ,因而可以对车辆悬挂系统进行最优控制。为基于该车型的半主动悬挂的研究。

As one of the main performance indexes,the vibration of vehicle affects the passenger ride comfort characteristic,the control stability,the endurance life of detail and then the safety of vehicle.Traditional passive suspension has become incapability in waning vibration.In order to improve the capability of waning vibration,the non passive suspension by using electronic control method has been studied in recent years.Based on a quarter model with two freedoms of BJ212,the authors believe that the vehicle suspension system is both controllable and observable by analyzing the controllability and observability and this conclusion could be applied to optimal control and design of non passive suspension.