飞机主起落架刹车诱导抖振分析  

Analysis on Brake Induced Vibration of Aircraft Main Landing Gear

作　　者：张明[1] 吴晓宇[2] Zhang Ming;Wu Xiaoyu(Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016 [2]上海飞机设计研究院,上海201210

出　　处：《机械科学与技术》2018年第11期1783-1790,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51305198)资助

摘　　要：建立了飞机刹车滑跑刚柔耦合动力学模型,采用控制变量法分析了单一因素对起落架抖振现象的影响规律,结果表明,当刹车力矩变化的频率接近起落架系统共振频率时,抖振现象非常剧烈;刹车力矩最大值越大,刹车力矩波动值越大时,抖振的振幅变化范围越大。在此研究基础上,分别对施加了减速率控制或滑移率控制的飞机起落架抖振进行研究,结果表明,相比于减速率控制方式,带PID控制器的滑移率刹车控制法不仅可提高刹车系统效率,而且可有效降低起落架抖振,提高飞机着陆安全性。Rigid-flexible coupling dynamics models for taxi and brake analysis are established.In order to analyze the influence factors of brake torque on gear buffeting in this model,the control variable method is applied.Simulation analysis is carried out on this model by changing only one parameter at a time.The simulation results show obviously that:when the frequency of brake torque variation gets close to the resonance frequency,gear buffeting phenomenon is very intense.When the maximum value of the brake torque rises,the gear buffeting phenomenon becomes acute.If the magnitude of gear buffeting fluctuation rises,the range of gear buffeting amplitude is larger in response.Based on previous conclusions,the slip rate braking control strategy and deceleration control strategy are applied for anti-skid braking control respectively,the further research on gear buffeting phenomena under two control cases is conducted,and the response under two different ways of anti-skid braking control strategy are compared.The results show that:the slip rate braking control method with PID controller are much better than the braking control method of deceleration control type,it can improve main gear brake efficiency,slow down gear buffeting,and also improve landing safety.

关 键 词：飞机 起落架抖振 刹车 防滑控制 刚柔耦合 

分 类 号：V226.3[航空宇航科学与技术—飞行器设计]