REALIZATION OF DISTURBANCE RESISTANCE OF A SYSTEM BY MEASUREMENT FEEDBACK
用输出反馈实现系统的能抗干扰

In this paper we discuss the problem that the regulated output is not affected by theexternal disturbance using measurement output feedback.We introduce the concept ofabsolutely observable subsystem under measurement output feedback,i.e.,the subsystemalways is observable for the regulated output under arbitrary measurement output fee-dback.Then,the necessary and sufficient condition for the realization of disturbance re-sistance by measurement feedback is obtained.