Fault Tolerant Control of Magnetorheological Intelligent Buffer System of Unmanned Fighter Landing Gear

This paper investigates the problem of designing an adaptive fault-tolerant controller for unmanned fighter landing gear, and using magnetorheological dampers as buffers for aircraft landing gear. Compared with other parts of the landing gear, the failure rate of magnetorheological damper is higher, which will affect the safety and reliability of the buffer system. In order to ensure that the landing gear buffer system can still work effectively when the MR damper partially fails or the damper is stuck, a robust adaptive fault-tolerant control algorithm is proposed in this paper. The landing gear buffer system with passive damping, robust control and the proposed robust adaptive fault-tolerant control are simulated. The simulation results show that the proposed robust adaptive control can not only reduce the impact of damper failure, but also ensure that the magnetorheological landing gear has a high buffer efficiency.