Research On Anti-skid Braking Simulation Technology For An Aircraft

The safe landing of an aircraft has a direct impact on the safety of the aircraft and the people onboard. With aircraft's weight increased, the landing speed up, and the landing environment complicated,the problem about airplane's reliability and safety becomes more important. It's necessary to establish the model and digital simulation of the anti-skid braking system. The research is carried out mainly on dynamics model, control system design and joint simulation, according to the brake system of a certain aircraft landing gear, and the result has definite reference value.Firstly, on the base of analyzing the characteristic of aircraft's anti-skid braking system and the speciality of various components, the model of aircraft is built, which contains braking device of landing gear, fuselage, a strut subsystem of lose landing gear, a wheel subsystem of lose landing gear, a strut subsystem of main landing gear and a wheel subsystem of main landing gear, using virtual prototyping software MSC.ADAMS. Then, PID control model of aircraft brake system is researched, control model of anti-skid braking system is established by MATLAB/Simulink., and PBM is introduced to make the system produce a relatively stable export quantity according to different runaway condition and skid characteristic, to improve brake efficiency. Lastly, joint Simulation and analysis of brake performance of a certain aircraft landing gear are carried out, based on MSC.ADAMS and MATLAB/Simulink. The influence that the specialty of the landing gear configuration, the characteristic of the wheel configuration, runaway and other factors have on the performance of aircraft anti-skid braking system is studied, to provide theoretic basis and reference for the study of anti-skid braking system.