Distributed parameter control problems of scramjet engines

Because dual-mode scramjets are used under extreme temperatures and with wide range of Mach numbers, they show different control properties from other airbreathing engines. Comparatively, new control problems have been found concerning investigations of the control method for dual-mode scramjets whose physical states are spatially interacted and whose governing equations are partial differential equations. Such control problems are called distributed parameter control problems which have been studied for several decades but implemented only in a few fields. The work of this paper is based on the application of distributed parameter control conception to study the control problems of dual-mode scramjets with the aim of achieving the desirable design properties and increasing control reliabilities. A new design method based on shape control theory is put forward to realize the distributed parameter control of dual-mode scramjets with the preconditions of proper space dimension and frequency-domain simplification, and simulation results for an axisymmetric, wall-injection dual-mode scramjet show the feasibility and validity of the method. is the paper style requirement for the Chinese Control Conference. The writers of papers should and must provide normalized electronic documents in order for readers to search and read papers conveniently.