Reusable Launch Vehicle Control System Design Based On LPV Approach

Nowadays, research and technology development of RLV is a major research focusin the field of aerospace. RLV’s flight parameters are highly coupled with a bigvariation range. For its design of flight control system, RLV’s strong nonlinearcharacteristic has been a great challenge to the design theories for today. The traditionalgain-scheduling control method has been unable to reach its high requirements for thecontrol system’s stability and robust performance. The method of Linear ParameterVarying control is used to improve the traditional gain-scheduling control method. Notonly it can solves the variable parameters dramatic change issues, but also itscontrolling performance has been further improved. In background of RLV, researchand application of LPV control has important significance.The main work of this paper include the following aspects: First, the relevanttheories about the LPV system model is introduced, including the LPV modeling forRLV and LPV models’ polytope transformation method; Second, the theory of robustvariable gain control is studied. A robust variable gain controller design method forLPV with polytope structure is described in details. As well as a scheduling policybased on parameters collection distance. Third, for the actual background of RLV, thedesign of the control system is simulated and analyzed. By adding different interferencecontrol system performance is analyzed to verify the rationality and effectiveness of thecontrol methodThis paper focuses on the LPV control theory which is applied to the specific RLVbackground. The construction method to establish a system model is introduced and thecontroller is designed to verify the theory. The results of simulation and analysis showedthat the method achieved the desired results.