【作者】 廖俊侠；

【导师】 聂宏；

【作者基本信息】 南京航空航天大学 ， 飞行器设计， 2009， 硕士

【摘要】 全电刹车系统是多电飞机重要的子系统,它以EMA(Electro-Mechanical Actuation)刹车机架取代了原来的液压活塞刹车机架,以数字式刹车控制器代替模拟式液压控制器,极大地提高了飞机的刹车效率和性能,提高了系统的安全性。论文以某型飞机起落架刹车系统为研究对象,通过对飞机全电刹车系统的工作原理、组成结构及刹车特性的细致分析,建立了飞机系统各个组成部分的数学模型,深入探讨了飞机动力学与运动学特性、起落架动态性能以及机轮跑道特性对飞机刹车系统的影响;对电作动机构和刹车力矩反馈作了深入的研究,确定了电作动机构的具体结构和设计参数,并在此基础上建立了系统整体的数学模型。针对现有刹车系统控制律的不足和全电刹车系统的特点,运用模糊智能控制设计刹车系统的控制律,采用控制系统仿真软件MATLAB/SIMULINK工具对飞机全电刹车系统进行了全系统的数字仿真,仿真结果表明:所建立的系统模型是合理的,较好地模拟了飞机刹车的动态过程,采用模糊控制能够得到较好的控制效果,同时也体现了全电刹车系统的优越性能。更多还原

【Abstract】 As one of the most important part of multi-electric aircraft, electric braking system takes use of the EMA(Electro-Mechanical Actuation)braking frame instead of the original hydraulic piston braking frame, and the digital anti-skid braking controller instead of the analogous anti-skid braking controller. It has been proved that the efficiency of braking as well as the performance and security of aircraft could be greatly improved as for the proposed electric braking system.In this paper, the landing gear braking system of a certain type aircraft has been investigated as the research object. Furthermore, mathematic models of each component have been established via comprehensive analysis of the working principle,constitutionof structure and the performance of electric braking. Meanwhile, an improved research on impact factors of the braking system has been discussed, such as the dynamics and movement characteristics of aircraft, the dynamic characteristics of landing gear braking wheel as well as the characteristics of runway . On the basis of research on the electric actuator and the braking moment feedback, a mathematic model of the entire system has been proposed with concrete form of the structure and parameters of the electric actuator.Owing to the characteristics of electric braking system and the drawback of current control algorithm, a comprehensive simulation of the entire system has been implemented taking use of fuzzy intelligent control algorithm with the simulation software MATLAB/SIMULNIK. It has been proved that the proposed model of system could be valid, which could have given a perfect simulation of the dynamic process of braking. Meanwhile, it has been confirmed that the priority of electric braking system, especially with fuzzy control method.更多还原