基于单轴气浮台的航天器运动部件干扰力矩地面标定方法研究

A study of calibration method for the disturbance torque of the moving parts of a spacecraft in laboratory based on single axis air floatation platform

摘要:

遥感卫星为实现宽视场和高分辨率，一般搭载含可往复转动大惯量成像部件的载荷，然而其转动产生的干扰给卫星姿态控制带来的影响，往往超出载荷成像所必须的姿态稳定度和指向精度要求，卫星平台需要采取措施对干扰力矩进行抑制。但由于加工、装配等原因，载荷干扰力矩与设计值一般均存在差异，给补偿方案设计、参数装订及地面验证置信度等带来不确定性。本文介绍了一种利用单轴气浮台实现航天器运动部件干扰力矩标定的方法，设计试验对该技术在实验室非真空条件下的实现、天地差情况进行说明，并对影响标定结果的误差进行了分析。

Abstract:

Remote sensing satellite to achieve wide FOV and high resolution, generally equipped with large inertia load with imaging components that can reciprocating rotation. however, the impact on satellite attitude control of the interference generated by the rotation, often failure to meet the attitude stability and pointing precision index requirements necessary for load imaging, so the satellite platform needs to take measures to suppress the disturbance torque. Nevertheless, due to the reasons of machining and assembly, disturbance torque of the load often different from the design value, which brings uncertainty to compensation scheme design, parameter binding and the confidence level of verification in laboratory confidence. This paper introduces method to calibrate the disturbance torque of the moving parts of a spacecraft by using a single axis air floatation platform. Design test to illustrate the realization of the technology under antivacuum condition in laboratory, Explain the difference of the test on the ground and in space, And The error which affects the calibration result is analyzed.