ADAPTIVE FAULT-TOLERANT CONTROL SYSTEM OF REUSABLE LAUNCH VEHICLE

摘要

The main advantages of the reusable launch vehicle (RLV), with characteristics of power return and glide path landing, are lower costs, easier launching process and higher transmission frequency. However, considering RLV's repeated use and poor working conditions, the possibility of faults is also greatly improved. The solution of constant deviation failure in actuator, which is a very common fault in RLV systems, is considered in this paper. The adaptive fault-tolerant control method can effectively ensure that the attitude control system can still work normally when the fault occurs once in the actuator. The adaptive fault-tolerant control program is based on model state observation. In this process, the control system expression is transformed into a linear matrix inequality (LMI), and the stability of the control system is ensured by the solution of LMI. Finally, the RLV specific hardware failures are analysed and simulated, which verify the effectiveness and feasibility of the fault-tolerant controller.