【作者】 陈龙；

【导师】 段宝岩； 李团结；

【作者基本信息】 西安电子科技大学 ， 机械电子工程， 2013， 硕士

【摘要】 本文首先对铰链间隙和空间可展开天线的研究背景与现状进行了综述,并详细研究了含间隙铰链的建模理论与方法。在此基础上,以含铰链间隙的曲柄滑块和可展开天线为研究对象,在前人工作的基础上,进行了以下研究：1.在深入研究了接触的类型、接触力的求解、接触参数的选取的基础上,结合自身建模经验,给出了一些在ADAMS中关于接触模型的建立和求解的经验。2.针对影响间隙处接触力的各个因素,在前人工作的基础上,将其分为内部因素和外部因素,通过建立参数化的曲柄滑块的虚拟样机,对影响碰撞力大小的因素进行了深入分析,找出了主要因素。并探索了柔性和间隙对机构动力学性能的综合影响。3.提出了一种适合空间可展开天线的间隙模型。该间隙模型建模简单,计算结果准确,适用于空间可展开天线中多间隙的情况,并在此基础上,建立了含多个铰链间隙的空间可展开天线的动力学模型,分析了间隙对空间可展开天线展开性能的影响。结果表明,间隙的存在影响了展开天线的展开精度,在展开过程的初始阶段,展开天线各杆件的速度、加速度波动剧烈,其后逐渐趋于稳定。更多还原

【Abstract】 This paper summarizes the background and actuality of joint clearance and space deployable antenna. The theory of modeling joint with clearance is deep analyzed. Based on the theory which is mentioned before, the slider-crank mechanism and deployable antenna both with clearance are investigated.The main work includes:1.The types of contact, the methods for solving contact force and the selection guidelines of contact parameters are studied. Integrating author’s experience, some tips for modeling contact are given.2.For the various factors that affect contact force, based on the previous work, the influence factors are divided into internal and external factors. The effect of the factors is analyzed through establishing parametric slider-crank model, the main factor is found. The effect of flexibility and clearance on the dynamic performance of mechanism is explored.3.A new clearance model for deployable antenna is proposed. This new model has the advantages of simpleness and exactitude. Based on this new clearance model, the dynamic model of deployable antenna with clearance is established. The effect of clearance on the dynamic performances of deployable antenna is analyzed. The results show that the presence of clearances affects the deployment precision of deployable antenna. In the initial stage of the deployment process, the components of deployable antenna fluctuate strongly, then gradually become stabilized.更多还原