微卫星在轨释放装置释放精度正交分析与验证

Orthogonal analysis and verification of release accuracy of microsatellite on-orbit release device

为解决可重复使用、通用性强、指向精度高的基于空间站的微卫星释放问题,提出一种微卫星在轨释放装置方案,并对其释放精度进行正交分析与验证.通过动力学分析软件对微卫星释放装置进行动力学仿真,通过正交仿真试验对影响微卫星释放角速度的因素进行分析;根据正交试验结果对各影响因素进行优选,设计制造微卫星释放单元;提出基于自由落体运动的失重模拟试验测试方案,并搭建失重模拟测试系统,系统重力平衡误差≤3%,角速度测试精度为0.1°/s.对微卫星释放单元产品进行试验测试,试验结果表明:经过参数优化,卫星释放角速度降低了67%,释放装置释放精度得到较大提高.

The on-orbit release device of microsatellite is one of the important tools for space exploration,which plays an important role in the development of space application field in China.A space station microsatellite in orbit release device was proposed,which is reusable,universal,low impact and high pointing accuracy.The dynamics simulation of the microsatellite releasing device was carried out by the dynamics analysis software.The factors affecting the angular velocity of the microsatellite releasing device were analyzed by the orthogonal simulation test.According to the orthogonal test results,the influencing factors were optimized,and the microsatellite release unit was designed and manufactured.A weightlessness simulation test scheme based on free falling body motion was proposed,and a weightlessness simulation test system was built.The gravity balance error of the system was≤3%,and the angular velocity test accuracy was 0.1°/s.The test results are basically consistent with the simulation results,which can be verified by each other.The test results show that after parameter optimization,the angular velocity of satellite release is reduced by 67%,and the release precision of the release device is greatly improved.