基于电磁阻尼器的全电起落架减摆性能研究

摘要

以某型无人机为研究对象,参考现有起落架前轮转弯的结构形式,设计了一种齿轮式全电转弯机构及相应的电磁阻尼器.分析了电磁阻尼器的结构,并推导了电磁阻尼器工作时所产生的阻尼力矩.基于LMS Imagine.Lab AMESim软件平台建立了全电起落架前轮减摆仿真模型,验证了电磁阻尼器的减摆功能,分析了不同阻尼系数工况下前轮摆角随时间的变化情况,确定了临界减摆阻尼系数的大小.研究了减摆工况下,电磁阻尼器对摆振偏角、偏角角速度等参数的影响,并在此基础上改进了电磁阻尼器的参数.%Aiming at a certain type of unmanned aerial vehicle,it designs a new type of all-electric landing gear steering mechanism and electromagnetic damper,with reference to existing nose wheel steering mechanism,introduces the structure of electromagnetic damper and deduces the damping torque generated by the electromagnetic damper.Based on the LMS Imagine.Lab AMESim software,it establishes the shimmy simulation model of the all-electric landing gear and verifies the shimmy function of the electromagnetic damper.In the condition of different damping coefficient,it analyzes the variation of the nose landing gear swing angle and determines the value of critical shimmy damping coefficient.The analysis results indicate the effects of electromagnetic damper on shimmy angle,angular velocity and other parameters,improves the parameters of electromagnetic damper.