本文介绍一种判别线性定常系统能控性和能观测性的新方法一目前在国内尚未充分普及的一种强有力的方法,其特点是简单、实用,在理论研究上也十分有用。用这种新方法得到了单输入单输出的串联、並联及反馈连接组合系统能控性、能观测性与极点零点相消间的一般规律。 In this paper, we present a powerful method for discriminating the controllability and observability of linear stationary systems, which is not yet widely used in China at present. It is characterized by simplicity and practicability, and is also very useful in theoretical research. By this new method, the general rules of controllability, observability and pole zero cancellation between the single input and single output series, parallel and feedback connection systems are obtained.