飞机前起落架在转弯控制状态下的摆振分析及应用

摘要

Shimmy of nose landing gear at state of control was analyzed. Requirements of the control system of nose landing gear wee made for avoiding shimmy through investigating the work of active force. Connection of active force and equivalent viscous damp was made by taking use of the principle of energy equivalence. Shimmy model based on the elasticity of tire was built to acquire active force shimmy zone and shimmy dynamic response with time, according to the convergent speed of shimmy dynamic response, the active force and effective piston areas of hydraulic actuator of nose landing gear steer system for avoiding shimmy can be computed.%对飞机前起落架在转弯控制状态下进行了摆振分析，通过主动力做功分析对转弯控制系统设计提出了建议和要求，应用耗能等效原理建立了主动力和等效粘性阻尼力间的关系。建立并求解以轮胎变形为主的摆振方程组得到主动力摆振区和摆振动态响应曲线，根据动态响应的收敛速度确定防摆所需的主动力及转弯作动器的有效活塞面积。