Airplane Intelligent Anti-skid Brake Control Box

In modern aircraft, the anti-skid braking system is one of the main airborne devices and plays a very important role in safely takeoff and landing.The anti-skid braking controller of a aircraft was reconstructed in a digital way. On the base of analyzing the theory of the anti-skid braking system, a realizable project used by control box has been presented, and the system based on 89C55 has been completed.The control theory and strategy of the anti-skid braking system is analyzed and disassembled according to its function. Using experience formula and the control theory of PID and fuzzy, the control box of the anti-skid braking system has been intelligentizd and digitized successfully. On Basis of on fuzzy model that has been set up, the design of fuzzy controller and the rule of control have been finished. Using the method of approximately reason of the fuzzy controller, the intelligentized control of controlled object has been realized. The inputs of fuzzy controller are the velocity of slippage and its ratio, the output of fuzzy controller is the control current of the servo valve. At the same time, a fuzzy control law based on 89C55 has been presented.The controller of the anti-skid braking system has already passed the experiment. The result shows that the hardware design of the anti-skid braking system's control box is feasible, the control strategy used is correct and efficiency, the system is stable and the performance of the anti-skid braking system is improved..