Abstract
A simple method is presented for designing an observer at some control station of a linear decentralized control system in this paper. A necessary and sufficient condition is given for the existence of the observer. It is then shown that the design problem of the observer for a linear decentralized control system is reduced to the problem of constructing the stable left inverse system, and that the minimal order observer can easily be derived by using the algorithm for the inversion developed by Moylan. An extensive application of the proposed method is also included to the design of a zero sensitivity observer to the variation of the system palameters.
