APPLICATION OF TOTAL SYNTHESIS TO ROBUST COUPLED DESIGN.

Total synthesis techniques for the control of linear multivariable systems are module theoretic methods aimed at bottom line design, where the designer selects at the outset the control action and system response characteristics which will be attained. This selection is made from the class having associated with it the possibility of an internally stable feedback realization. In practice, however, such realizations are normally carried out with decentralized dynamics, or fixed structure. They must be achieved in such a way that plant parameter variation does not materially inhibit the nominal filter responses. This paper reports on the extension of the Total Synthesis Problem (TSP) concept to robust feedback realizations of fixed structure. An example from turbojet engine data illustrates the concepts.