Modeling and adaptive control of magneto-rheological buffer system for aircraft landing gear

The main advantages of magneto-rheological buffer system for aircraft landing gear are adjustable damping force, simple structure and independent of external energy. A kind of magneto-rheological damper structure for aircraft landing gear was presented in this paper. The state equation was established and the landing buffer system control strategy was designed based on self-made magneto-rheological landing impact platform. Integrating with model predictive control, a semi-active control method was studied and used it in realizing the adaptive magneto-rheological buffer system landing process. It has been proved in practice that the proposed control method fully considered the boundless of output damping force. The problem of balancing between landing and taxiing, which is caused by un-adjustable passive damping force in the working process of oleo-pneumatic buffer system, is solved.