基于分析和测试结果,对遥感卫星的光学有效载荷的机械稳定性的评估
Dulat Akzhigitov1, Berik Zhumazhanov1, Aigul Kulakayeva1,2
1Ghalam LLP, Astana Z05G9X0, Kazakhstan.
Sensors (Basel, Switzerland)
|November 13, 2025
概括
这项研究通过有限元建模 (FEM) 和振动测试验证了纳米卫星光学有效载荷的机械稳定性. 结果证实了结构完整性,并强调了需要FEM中准确的缓冲系数来进行可靠的预测.
科学领域:
- 航空航天工程 航空航天工程
- 机械工程 机械工程
- 纳米卫星技术 纳米卫星技术
背景情况:
- 纳米卫星光学有效载荷在发射过程中需要强大的机械稳定性.
- 在动态负载下准确预测结构完整性对于任务成功至关重要.
- 有限元模型 (FEM) 是预测有效载荷性能的一个关键工具.
研究的目的:
- 将有限元建模 (FEM) 数据与纳米卫星光学有效载荷的实验振动测试进行比较.
- 通过对实证数据验证FEM预测来完善计算模型.
- 为了提高空间任务机械稳定性评估的可靠性.
主要方法:
- 有限元素建模 (FEM) 分析与平均缓冲系数.
- 实验性振动测试,包括适配器空白测试,共振研究,随机振动和正弦脉冲测试.
- 将FEM结果与实验数据进行比较,以确定差异并验证模型.
主要成果:
- 在FEM分析中,安全性 (MoS) 的平均收益率为2.5,在关键区域至少为1.8.
- 共振研究发现了300-1340 Hz之间的显著振动模式,特别是在二级镜子支架和电子单元中.
- 计算和测试RMS加速度值之间的差异归因于缓和的频率依赖性和局部性质 (ζ = 0.9%4.8%).
结论:
- 纳米卫星的光学有效载荷在模拟发射条件下证明了结构完整性.
- 该研究确定了需要注意的特定结构元素,并验证了将精确的缓冲系数纳入FEM的必要性.
- 这些发现为优化纳米卫星有效载荷设计和集成提供了有价值的数据,以提高机械稳定性.
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