| A core component of all-electric braking in more-electric airplane is designed, which replaces the traditional hydraulic actuating structure. It builds up numerical actuating system combined with braking controller, whose total braking performance is more excellent than hydraulic system. A kind of redundant motor and its control system is designed based on reliability, and motor's electromagnetic, structure and controller soft and hardware design are explained in detail, system's simulation is achieved, and the results are analyzed on reliability.The development of airplane braking system technique is summarized firstly, the demand of high technique and high reliability of braking system in all-electric airplane time is analyzed, the characteristic of various motors with their control systems and the demand of braking electric-mechanic actuating system are compared, and switched reluctance actuating system is selected based on reliability redundancy.The core component of electric-mechanic actuating structure-principle andcontrol method of switched reluctance motor(SRM) is explained in detail. SRM's finite element analysis, magnetic field and motor structure design are mainly discussed. System controller is based on TMS320F240, which utilizes DSP internal resource with peripheral circuits to implement velocity measuring, current feedback, over current protect, series communication and so on, and the driver of 6/4 SRM is based on IR2130. Controlling arithmetic adopts three loop control strategy, and system's simulation is achieved.System's simulation shows that system has excellent dynamic performance, can track anticipant braking force quickly and exactly. Designs on motor field and structure, controller main circuit current commuting mode design, TMS320F240 least system and system program consider system normal operation under fault condition fully. At last, system is reliable, and its performance is excellent. |
PDF Full Text Request