Design of a Single-Range Controller for the Pressure Control of a Combustion Chamber

In this paper, a systematic procedure for design of a combustion chamber pressure control system is presented. The procedure is applied to a typical liquid propellant engine and the performance of the resulting new control system is compared with that of the present one. In this research, the nonlinear and dynamic mathematical model of the engine, which includes both soft and hard nonlinearities, is used. The systematic controller design procedure is based on describing function models of the engine coupled with the factorization theory.