And the extrusive problem in this kind of system is the surplus torque, so it is very important that how to effectively design the system according to the characteristic of the system.

• 被动力伺服系统中突出的问题为多余力问题,如何能够根据系统特点进行有效的伺服控制系统设计,提高性能品质,具有重要的意义。