Reduction of Z-Transfer-Function Matrices by Means of the Mixed Method
Leang‐San Shieh, Kaveh M. Dadkhah, ROBERT E. YATES · IEEE Transactions on Industrial Electronics and Control Instrumentation · 1976
The mixed method of Shieh and Wei which utilizes the dominant-eigenvalue concept and the continued fraction approach is extended to the z domain to simplify z domain-transfer-function matrices with various dimensions. The reduced model is always stable and the dominant performance of the original system is retained.