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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、设计提供了理论依据
Vehicle vibration is an important factor affecting vehicle performance, which not only affects the ride comfort of the vehicle, but also has a great influence on the handling stability of the vehicle and the fatigue life of the auto parts, and further affects the driving safety of the vehicle . Traditional passive suspension has been greatly limited in reducing vehicle vibration. In order to further improve the damping capacity of the vehicle suspension system, in recent years, research on passive suspension has been carried out and the performance of vehicle suspension system has been improved by electronic control method. In this paper, the establishment of BJ2 1 2 off-road vehicle suspension system two degrees of freedom model to start with the modern control theory in the state space method of vehicle suspension controllability and observability was analyzed, the car The suspension system is both controllable and observable. Because the car semi-active suspension system is both controllable and observable, the vehicle suspension system can be optimally controlled. For the semi-active suspension based on the model of the research, design provides a theoretical basis