Research on Ground Microgravity Simulation System Based on Parallel Mechanism

IF 1.3 4区工程技术 Q2 ENGINEERING, AEROSPACE

Microgravity Science and Technology Pub Date : 2024-01-20 DOI:10.1007/s12217-023-10094-5

Jiaxi Jin, Xuan Sun, Dong Yu, Zhaobo Chen

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引用次数: 0

Abstract

This paper presents a reconfigurable satellite ground microgravity simulation system based on a parallel mechanism, which allows cxsfor adjustable gravity coefficients and can simulate three-dimensional space movement with fast response and high accuracy. Firstly, the parallel motion platform and parallel six-dimensional force sensor designed specifically for the microgravity simulation system serve as the mechanical structure of the system. Secondly, a control system for simulating microgravity has been proposed, which includes a data acquisition component and a motion control component. Thirdly, a novel microgravity simulation algorithm, which can adjust the gravity coefficient and is based on the constant variation method, was proposed to establish the mapping relationship between the six-dimensional external force and displacement. Finally, the six-dimensional force sensor is statically calibrated and demonstrated excellent measurement performance. After implementing gravity compensation through surface polynomial fitting, the motion platform for microgravity simulation can react within 0.15 s upon detection of a force signal by the sensor, with a response error of less than 3%. The ground microgravity simulation system based on parallel mechanisms has been successfully applied to test the tolerance capability of reconfigurable satellite docking interfaces.

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基于并行机制的地面微重力模拟系统研究

摘要本文提出了一种基于并联机构的可重构卫星地面微重力仿真系统，该系统可实现重力系数的cxs可调，并能以快速响应和高精度模拟三维空间运动。首先，专为微重力模拟系统设计的平行运动平台和平行六维力传感器是该系统的机械结构。其次，提出了模拟微重力的控制系统，包括数据采集组件和运动控制组件。第三，提出了一种可调节重力系数的新型微重力模拟算法，该算法基于恒定变化法，建立了六维外力与位移之间的映射关系。最后，对六维力传感器进行了静态校准，并展示了出色的测量性能。通过表面多项式拟合实现重力补偿后，用于微重力模拟的运动平台可在传感器检测到力信号后的 0.15 秒内做出反应，响应误差小于 3%。基于并联机构的地面微重力模拟系统已成功应用于测试可重构卫星对接界面的耐受能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microgravity Science and Technology 工程技术-工程：宇航

CiteScore

3.50

自引率

44.40%

发文量

期刊介绍： Microgravity Science and Technology – An International Journal for Microgravity and Space Exploration Related Research is a is a peer-reviewed scientific journal concerned with all topics, experimental as well as theoretical, related to research carried out under conditions of altered gravity. Microgravity Science and Technology publishes papers dealing with studies performed on and prepared for platforms that provide real microgravity conditions (such as drop towers, parabolic flights, sounding rockets, reentry capsules and orbiting platforms), and on ground-based facilities aiming to simulate microgravity conditions on earth (such as levitrons, clinostats, random positioning machines, bed rest facilities, and micro-scale or neutral buoyancy facilities) or providing artificial gravity conditions (such as centrifuges). Data from preparatory tests, hardware and instrumentation developments, lessons learnt as well as theoretical gravity-related considerations are welcome. Included science disciplines with gravity-related topics are: − materials science − fluid mechanics − process engineering − physics − chemistry − heat and mass transfer − gravitational biology − radiation biology − exobiology and astrobiology − human physiology