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某卫星采用一箭多星方式直接发射入轨,在星箭耦合分析中发现星箭界面部分频点振动环境明显高于原设计要求,导致卫星可能需要采取改进设计以满足该变化。为进一步明确卫星的环境适应性,文章首先针对超限频点开展刚度匹配分析和响应分析,识别可能存在的风险,并对识别出的服务舱+Y板采取改进措施;其次,开展整星动力学分析、星箭耦合分析,分析验证卫星及其组件的适应性,并提出了改进的地面试验条件,结果表明地面试验能够包络星箭耦合分析结果,试验是充分的;最后,通过飞行试验验证,证明地面试验能够包络在轨飞行振动环境,采取的分析验证和试验验证是可行的。该研究方法及所取得的结论可为解决后续卫星研制过程中类似问题提供参考。
In a satellite-arrow coupling analysis, a certain satellite is launched into the orbit directly by using a one-arrow multi-satellite mode. It is found that the vibrational environment at some frequency points of the satellite interface is obviously higher than the original design requirement, which may result in the satellite possibly adopting an improved design to meet the change. In order to further clarify the environmental adaptability of satellites, the article first carries out stiffness matching analysis and response analysis for the overrun frequency points to identify possible risks and take measures to improve the identified service cabin + Y board. Secondly, The results show that the ground test can envelop the satellite-arrow coupling analysis results, and the experiment is sufficient. Finally, through the flight test It is proved that the ground test can envelop the vibration environment of on-orbit flight, and the analysis, verification and test verification are feasible. This research method and the conclusions obtained can provide reference for solving the similar problems in the subsequent satellite development.