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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。
Taking a type of UAV as the research object and referring to the structural form of the front wheel turning of the existing landing gear, a gear type all-electric turning mechanism and a corresponding electromagnetic damper are designed. The structure of the electromagnetic damper is analyzed, and the damping moment generated by the electromagnetic damper is deduced. Based on the LMS Imagine.Lab AMESim software platform, the simulation model of the front wheel tangential reduction of full landing gear was established, the damping function of the electromagnetic damper was verified, and the change of the front wheel swing angle with time under different damping coefficient conditions was analyzed. The size of the critical damping coefficient. The influence of the electromagnetic damper on the parameters of the pendulum deflection and the angular velocity is studied under the condition of dimming, and on the basis of this, the parameters of the electromagnetic damper are improved.