摘要
针对飞机着陆刹车三自由度仿真模型存在的不足,研究了六自由度飞机对象建模的基本方法和原理,并给出了飞机机体的空间运动方程。考虑了飞机纵横向之间的耦合作用和决定飞机刹车性能的因素,没有对刚体运动模型做简化处理,直接根据牛顿第二定律推导出机体全量非线性方程,结合飞机起落架的纵横向刚度模型和传统液压刹车系统模型,建立了六自由度飞机刹车系统整体模型,并且基于matlab/simu link对其数学模型进行了转化,建立了可在计算机上实现的数学仿真模型,给出了湿跑道下仿真结果。结果表明,所建立的六自由度飞机刹车系统模型能够充分表征飞机着陆刹车的实际运行特性,为飞机刹车性能的改善和视景系统更多参数的体现提供了基础和前提。
In view of the disadvantage of three-degree-of-freedom simulation of the airplane,a general method and principle for establishing simulation model of six-degree-of-freedom airplane are researched,and the motion equation is presented.It studies the coupling influence between longitudinal and lateral directions,and takes main factor of airplane braking performance into account.By this modeling method the whole non-linear equation is derived directly from the second Newton law without linearization of movement model of rigid body.Then it integrates the longitudinal and lateral rigid models of landing gears and the traditional hydraulic braking system to construct the whole braking system model of six-degree-of-freedom airplane.Based on matlab/simulink,the mathematical model is translated into the digital simulation model which could be realized in computer.It gives the simulation results on wetway.The simulation results show that the model could describe sufficiently the braking system characteristics.
出处
《计算机仿真》
CSCD
2008年第9期54-57,73,共5页
Computer Simulation
关键词
六自由度数学模型
刹车仿真
力学模型
飞机
Six-degree-of-freedom mathematical model
Braking simulation
Mechanical model
Airplane
