磁流变减摆器结构设计与参数优化

发布时间：2018-04-08 19:26

  本文选题：前起落架　切入点：叶片式结构　出处：《中国民航大学》2016年硕士论文

【摘要】：飞机在起降过程中容易受侧风及机场道面等因素的影响而发生前轮摆振,前轮摆振对飞机的地面操控性能、起降可靠性和乘坐舒适性都有不利的影响。当前控制飞机前轮摆振的最有效方法是在前起落架上安装油液式减摆系统,这种防摆措施属于被动控制,对飞机载重等因素变化导致的前轮摆振阻尼的改变不能实时响应,其控制效果尚有一定改善和提升空间。因此,本文依据磁流变原理,设计了一款新型结构形式的磁流变减摆器,用以改善现有起落架的防摆性能,提升起落架的摆振控制效果。本文所设计的磁流变减摆器,基于压差与剪切联合工作模式,采用缝隙通道节流形式,叶片式结构。利用ANSYS WORKBENCH软件对该减摆器的磁路进行了优化设计;根据优化结果,利用CATIA和PROE完成了结构设计和节流通道的尺寸设计,并使用AUTOCAD绘制了加工图纸;完成了该减摆器及辅助试件的加工、装配、调试与试验。针对完成组装调试的磁流变减摆器试验件,在理论分析的基础上,在某起落架研究所减摆器振动测试实验台上进行了阻尼特性试验,主要完成了零电流,不同振幅、频率变化条件下的阻尼特性试验;不同电流、不同振幅和频率条件下的阻尼特性试验。结果表明该磁流变减摆器能够产生最大600N的减摆阻尼力。在通入电流时,同振幅、同频率条件下,该减摆器输出阻尼力有一定提高,其最大调节倍数为1.3。该磁流变减摆器能够提供减摆阻尼实现阻尼力调控功能,证明了设计的可行性,同时仍然有不足之处可以改进。
[Abstract]:The front wheel shimmy is easy to occur during the take-off and landing process. The front wheel shimmy has adverse effects on the ground handling performance, take-off and landing reliability and ride comfort of the aircraft.Its control effect still has certain improvement and promotion space.Therefore, according to the principle of magnetorheology, a new type of magnetorheological damper is designed in order to improve the anti-swing performance of the existing landing gear and improve the control effect of the landing gear.The magnetorheological damper designed in this paper is based on the combined operation mode of pressure difference and shearing and adopts slot channel throttling and blade structure.According to the optimization results, the structure design and the size design of the throttling channel are completed by using CATIA and PROE, and the machining drawings are drawn by AUTOCAD.The processing, assembly, debugging and testing of the pendulum reducer and the auxiliary specimen are completed.On the basis of theoretical analysis, the damping characteristic test of the magnetorheological damper was carried out on the vibration test bench of a landing gear research institute. The zero current and different amplitudes were accomplished.The damping characteristic test under the condition of frequency change, the damping characteristic test under different current, different amplitude and frequency.The results show that the magnetorheological damper can produce a maximum damping force of 600N.Under the condition of the same amplitude and the same frequency, the output damping force of the pendulum reducer is improved, and its maximum regulating multiple is 1.3.The magnetorheological damper can provide the damping damping to realize the damping force control function, which proves the feasibility of the design, and there are still some shortcomings that can be improved.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V226
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本文编号：1723036