飞机地面转弯和刹车响应动力学分析

 建立了飞机地面运动的数学模型，模型中考虑机体的六自由度运动和起落架弹性；基于滑移率控制方式建立了机轮防滑刹车模型。通过仿真得出了飞机地面匀速转弯和滑跑刹车的动态响应。其结果表明，飞机匀速转弯时，其峰值出现在初始非稳态时刻；弹性起落架在着陆和刹车过程中产生走步现象；采用滑移率控制方式使飞机在整个刹车过程中取得最佳刹车性能。

Dynamics Analysis of Aircraft Ground Steering and Braking Responses

A mathematic model of aircraft ground movement is established,considering the six-degree-of-freedom aircraft body and the flexible landing gear strut.The landing gear system is regarded as an assembly of suspension strut,wheel,and tire,each of which is modeled as an individual module.The aircraft ground dynamic responses of steering with uniform velocity are simulated,which is verified correct by the experiential formula.A slip-ratio-controlled anti-skid braking system is modeled too,and the numerical simulation is carried out for the aircraft dynamic response while landing and taxiing on dry ground with anti-skid braking.The results indicate that the braking system model is correct and has good effect on aircraft.From the steering and braking simulation,three important conclusions are obtained: The top loads of the aircraft appear in the initial unstable state time while steering with uniform velocity;The flexible strut will vibrate while landing and taxiing with anti-skid braking;The slip-ratio controlled anti-skid braking system can obtains the best performance during the whole braking course.