抄録
The zeros of single input/output linear stationary systems have following two properties: (1) the positions of the zeros are invariant under a state feedback, and (2) they become the poles of the unobservable subspace if the unobservable subspace could be made by an appropriate state feedback. And these two properties are used for the stability criteria of the systems which have zero outputs or zero sensitivity.
This paper extends these concepts to a class of multi inputs/outputs systems.
The results give a new meaning to the numerator polynomials of the McMillan form of the transfer function, and also provide the stability criteria of multi inputs/outputs system which have zero outputs or zero sensitivity.
