某平台卫星发射及在轨力学环境测量与分析

为获取航天器准确的发射及在轨力学环境数据,设计了一套具有数据采集、存储和传输功能的星载测量系统。利用该系统对某大型平台卫星发射飞行过程进行了测量,获取了星箭界面及卫星结构典型位置在发射主动段的正弦振动响应、随机振动响应、冲击响应及在轨微振动的环境数据。将测量数据与星箭载荷耦合分析结果、地面力学试验结果进行了详细对比,结果表明:星箭载荷耦合分析的结果在星箭界面处横向相对准确,而纵向在有限频段准确,其他频段及星上分析结果均大于测量结果,即存在极大裕度;地面试验结果大于测量结果,意味着有较大的裁剪设计空间。测量数据对后续卫星模型修正、试验条件设计、相似平台卫星抗力学环境优化、部组件设计等均具有重要的参考价值。

Dynamics parameter measurement and analysis of certain satellite platform during the launch and in orbit

In order to obtain the dynamics response parameters of the satellite during the launch and in-orbit phase, a measurement system is designed to collect and save these data, and to send them to the ground. The system is loaded on a large satellite platform and the measurement mission is completed successfully. The important and significant data, such as the sine vibration response, the random vibration response, the pyro-shock response and the micro-vibration of the in-orbit structure between the interface of SC/LV and on the satellite structure, are obtained and analyzed, and also compared with the ground test results and the SC/LV coupling analysis results. The results show that in the satellite-rocket interface, the coupling analysis is quite good in the horizontal direction and for several frequency segments in the vertical direction, but a large margin exists for other frequencies and on the satellite. Thus the design should be further optimized, including the modifying of satellite model, the tailoring of test conditions, and the design for similar satellite platform for better mechanical properties.