系绳拖曳半物理试验装置设计与方案可行性验证

空间绳系系统需进行地面试验,以验证其理论研究结果的正确性。针对其非线性动力学模型较为复杂,地面难以模拟太空复杂情况而不易开展全物理试验的问题,设计了系绳拖曳地面半物理仿真试验装置。其中,仿真系统中系绳收放与张力控制部分以实物的方式引入仿真回路,拖曳过程中系统动力学部分以数学模型描述并转化为仿真计算模型,与实物部分构建成半物理仿真闭合回路。采用基于模糊PID的主从位置闭环控制器对张力控制器进行控制,搭建半物理试验装置拖曳过程simulink仿真模型,对闭合回路实现仿真计算以验证半物理试验装置方案设计的可行性。仿真结果表明：(1)张力控制器满足半物理加载机构对模拟被动星的系绳控制指令要求；(2)半物理试验装置设计方案原理正确,可通过模拟不同工况下动力学模型特性,考核系绳收放装置性能。

Design and feasibility verification of tethered towingsemi-physical test device

The space tethering system needs a ground test to verify the correctness of its theoretical research results. Aiming at the problem that its nonlinear dynamic model is complex and it is difficult for the ground to simulate the complex situation of space and it is not easy to carry out a full physical test, a tethered towed semi-physical simulation test device is designed. the tether retracting and tensioning part of the simulation system introduces a simulation circuit in the form of a physical object. During the dragging process, the system dynamics part is described by a mathematical model and converted into a simulation calculation model. A semi-physical simulation closed loop is constructed with the physical part. The controller of the master-slave position based on fuzzy PID is used to control the tension controller, and the simulink simulation model of the dragging process of the semi-physical test device is set up. From the simulation results, it can be seen that: 1) the tension controller meets the requirements of the tether control instruction of the semi-physical loading mechanism to simulate the passive star; 2) the design principle of the semi-physical test device is correct, and the dynamic model characteristics under different working conditions can be simulated; Assess the performance of the tether retractable device.