通过理论分析 ,结合仿真与试验 ,研究了多余力对被动式电液力控制系统的影响。根据最优化原理 ,按线性定常二次型最优跟踪器设计了针对任意载荷谱的最优控制器。试验结果证明 ,优化设计方法应用于被动式电液力控制系统 ,明显地改善了系统对斜坡信号的干扰抑制和跟踪性能 Through theoretical analysis and simulation and experiment, the influence of excess force on passive electro-hydraulic control system is studied. According to the optimization principle, an optimal controller for arbitrary load spectrum is designed according to a linear stationary quadratic optimal tracker. The experimental results show that the optimal design method is applied to the passive electrohydraulic control system, which obviously improves the interference suppression and tracking performance of the system to the ramp signal