无人机主起的起转载荷分析及试验方法研究  

The research of spin-up load of UAV main landing gear and its test method

作　　者：马伍元[1] 刘波[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《现代制造工程》2014年第2期119-122,共4页Modern Manufacturing Engineering

基　　金：吉林省与中科院科技合作高技术产业专项资金项目(2013SYHZ005)

摘　　要：为了快速验证某小型无人机扁簧式起落架初样的强度和刚度特性,通过理论分析起转载荷并结合简化试验的方法对起落架进行了研究。首先通过试验测定了扁簧式起落架的刚度曲线,为后续分析和试验奠定基础;其次采用防滑刹车理论中的双线性模型来模拟轮胎与地面间的结合系数,计算出无人机着陆时的最大起转载荷;最后采用质量缩减法进行了落震试验。试验中利用角度可调的斜台产生水平分力来模拟起转载荷,采用高速摄像机来记录扁簧的实际压缩量,对关键结构件进行应变测量,并在试验后对扁簧等复合材料件进行A型超声波探伤。结果表明,起落架可以被进一步优化,所研究的试验方法可以为无人机起落架的设计提供指导。By theoretical calculation and simple test, a Unmanned Aerial Vehicle （UAV） main landing gear prototype;it whose buffer is a spring leaf, it is researched to quickly check its strength and stiffness character. Firstly, the stiffness curve of a UAV main landing gear prototype of spring leaf is gotten through experiment, providing data for follow-up analysis and test. Secondly, according to the basic principle of anti-skid braking theory, using the bilinearity model of the relationship between tire-runway ad- hesion coefficient and slip ratio, the maximum spin-up load is obtained. Finally, using the method of mass reduction, the landing gear drop test is carried on,with the spin-up load produced by a tilt platform. The deflection of the spring leaf is obtained by the high speed camera system. The strain of key parts is measured and the spring leaf is inspected by A-ultrasonic wave after the test. The result is that the spring leaf and other parts can be optimized. The method researched can supply guidance to the design of UAV landing gear.

关 键 词：起转载荷 起落架 落震试验 扁簧 

分 类 号：TH-3[机械工程]