基于遗传规划的飞机跑道参数辨识

Application of GP in Aircraft Runway Parameter Identification

飞机刹车系统的研究离不开飞机所在的跑道环境,在飞机高速滑跑过程中,轮胎——跑道特性对整个系统有至关重要影响;因此,在刹车系统的研究过程中,需要对滑跑时的跑道状况有深入了解,得出轮胎跑道间的精确关系;针对飞机刹车系统中轮胎与跑道滑移率关系的非线性和不确定性,利用进化计算中的遗传规划算法,通过遗传程序对地面结合系数——滑移率样本库进行遗传进化操作,得到各种跑道状况下的结合系数随滑移率变化的特性,实现了跑道模型参数的辨识,并将辨识结果应用于模型的改进之中,取得了良好的仿真效果;该方法的提出,对飞机仿滑刹车系统的设计、改进以及刹车效率和刹车性能的提高具有重要意义。

The research of aircraft system could not be separated from the condition of tyre -runway, the character of which is very important to the whole system in the course of braking. It is necessary to have the accurate relation of tyre and runway, for the purpose of overcoming the uncertainty of tyre- runway model in aircraft braking system, genetic programming （GP） based on evolution computationis isused to get the relation of friction coefficien rand slip ratio from the set of samples under different runway conditions. Through this method, the formulas of friction coefficient-slip ratio can be given and the identification is applied to improve system mathematic model, the simulation is satisfying. It is helpful to design the aircraft anti- skid braking system, and to improve the braking efficiency and braking performance.