Stability Test for Finite State Variant Coefficients'' Discrete Systems
有限状态变系数离散系统的稳定性检验

The paper proposes the model,stability test theorems and their fast algorithm for the discrete systems with finite state variant coefficients which vary independently with the system's clock.The necessary and sufficient condition for stability of this kind of systems is that the denominator polynomials of their transfer functions are finite Schur polynomial family.The stability test procedure has been simplified by improved Schur test table with variant coefficients,and the computation amount has been reduced and can be completed by finite computations