被控对象为一个三环结构的伺服系统。伺服系统参数和控制参数在程序中给出描述。系统采样时间为1ms.根据是否加入摩擦干扰和前馈补偿分别进行仿真。-Charged for a three-ring structure of the servo system. Servo system parameters and control parameters described in the procedure are given. System sampling time of 1ms. In accordance with whether or not to join friction feedforward compensation interference and simulation, respectively.