MULTIVARIABLE SYNTHESIS WITH INVERSES.

An illustration is given of the application of total synthesis (TS) methods to the design of controller dynamics for linear multivariable models of realistic turbine engine simulations. TS methods provide the designer with a capability to specify thoroughly and directly the nominal dynamic relationship between command or request variables and controlled or response variables. Under reasonable assumptions, this capability can include transient response as well as limiting values, and of course internal stability. Particular stress is placed upon the inverse total synthesis problem (ITSP), which emphasizes the inverse of the plant input/output relation, expressed typically as a matrix of transfer functions. In numerous case studies, the ITS approach has shown an ability to preserve designer insight and influence, and has turned out to be relatively easy to understand - both properties of importance for general control applications.