Research On Modeling And Taxiing Rectification Control Of Aircraft Electric Braking System

The braking system is an important airborne equipment of aircraft, and its performance directlyinfluenced the ability of aircraft’s take-off, landing, repeated operation and adaption to the airportrunway. With the propose of more electric aircraft technology, the using of electric actuationmechanism instead of traditional hydraulic actuation mechanism has become an inevitable trend in thedevelopment of aviation technology. The All-Electric Braking System using Electro-MechanicalActuation rack replacing the primary-hydraulic one and digital braking controller replacing theanalogous-hydraulic one, which can greatly improve the aircraft braking performance and efficiency,as well as the security and reliability of the system. All the probable factors, such as the unavoidableasymmetry of aircraft structure, unevenness of the airport runway, various wind disturbance andexistence of the yaw angle and lateral deviation in the process of aircraft landing, can lead to thewrong course and then the aircraft may run out of the runway, causing serious accidents.In this paper, a certain type of aircraft has been investigated as the research object and arelatively accurate ground taxiing model has been established at first. Via comprehensive analysis ofthe working principle, the structure constitution and the electric braking performance, built up themathematical models of each component of the system as well as the entire system based on deepinvestigation of the electric actuator and design of its concrete parameters. Later, proposed the groundrectification control plan and structure and gave the concrete control expression, then a simulation ofthe aircraft electric differential braking system has been implemented in the environment ofMATLAB/SIMULINK, which is to validate that the established model and the rectification controlscheme is reasonable, and the control algorithm is of high efficiency. In the end, using the intelligentcontrol method——fuzzy-PID to design the skid control algorithm of the electric braking system. Thesimulation results reflect high performance of the electric baking system.