Aircraft Anti-skid Brake Control System A Combination Of Factors

In the 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 ground adhesion coefficient-slip relation is analysed and researched by four methods. Firstly,aiming at Pacejka model ,the range of the parameter B,C,D and effects on the Pacejka curves shapes is discussed . Secondly, non-linearity characteristic of ground adhesion coefficient-slip is resolved by the BP algdrithm of the neural network, the datum measured on the test-bed are drew up, and relation of coefficient-slip is sought finely.Thirdly,using fuzzy control to resolve the non-linearity characteristic of groud adhesion coefficient-slip.By identifying on line,designing a fuzzy controller and defining the rules of fuzzy control, the curve of the relationship of coefficient-slip is sought finely.Forthly,An on-line parameter identification method that is least-square is presented because the coefficient between tyre and runway hasn't been got.Finally,simulating the system in the MATLAB/SEMULINK,then analyzing and comparing the results of simulating.The results indicate that the system which adopts the method of artificial intelligence and abilities is more excellent than the system that adopts the method of mathematic calculating.