气浮悬吊式太阳翼重力补偿装置的设计与验证

Design and Verification of Air-floating Suspension Gravity Compensation Device for Solar Wing

针对滚轮滑车悬吊式重力补偿装置运行阻力大、气浮支撑式补偿装置无法满足机构向气浮平台方向运动的问题,提出了基于龙门架式支撑结构与横、纵双向气浮导轨相结合的悬吊式重力补偿装置设计方案。采用多段拼接技术解决了超长纵向导轨生产与装调难题;采用在纵向导轨拼缝两侧增设节流孔的方法,提升了纵向滑车在拼缝处的运行平稳性;在纵向导轨上采用倒"V"形工作表面,解决了因外力未通过质心可能引起横向导轨运行偏转的问题;采用挤压成型中空铝型材与碳纤维增强梁相结合的方法实现了大跨距横向导轨的减重与抗弯刚度的提升。经分析与试验验证,在单个悬吊点处悬挂90kg负载,该装置最大运行阻力系数不超过0.037%,运行范围可达2 m×20 m,在速度不超过1 m/s,加速度不超过0.3 m/s^2的使用条件下,具有良好的动态跟随能力,可满足太阳翼、天线等大型空间可展开机构地面展开试验与性能测试的需求。

Aiming at the problem that the running resistance of the wheeled trolley suspension gravity compensation device is large and the air-floating support compensation device cannot meet the requirement of the mechanism deploy against the air-floating platform, a suspension gravity compensation device composed of the gantry-type support structure and the transverse and longitudinal two-way air-floating guides is proposed. The multi-segment splicing technology is used to solve the problem of production and adjustment of super long longitudinal guide rails;the method of adding throttle holes on both sides of the longitudinal guide joints is adopted to improve the running stability of the longitudinal air-floating trolley at the joints;The inverted "V" shaped working surface solves the problem of transverse rail running deflection caused by the external force not passing through the centroid;the combination of the extruded hollow aluminum profile and the carbon fiber reinforced beam realizes the weight reduction and bending stiffness increase of the large span transverse guide rail. After analysis and test verification, in case of hanging a 90 kg load at a single suspension point, the maximum running resistance coefficient of the device is not more than 0.037%, the operating range is up to 2 m×20 m. In case of a follow speed not more than 1 m/s and the acceleration is less than 0.3 m/s^2, the device has good dynamic following ability, which can meet the requirements of ground deployment test and performance test of large space deployable mechanisms such as solar arrays and antennas.