航天器环境工程2018，Vol.35Issue(1)：44-48,5.DOI:10.3969/j.issn.1673-1379.2018.01.008
星载复杂组件随机振动试验载荷设计方法改进
A modified method for designing random vibration test load for complicated spaceborne unit
王跃宇 1周志成 1王畅2
作者信息
- 1. 中国空间技术研究院 通信卫星事业部,北京 100094
- 2. 北京联合大学 旅游学院,北京 100101
- 折叠
摘要
Abstract
The current methods for designing the random vibration test load for complicated units, like the ESM and the AFM, can hardly satisfy the demand of load tailoring from the manufacturers of the units, because the prediction results always are too high to be acceptable compared with the practical load in some loading directions. Thus a modified random vibration test load design method, the DMM, is proposed in this paper, with the random excitation power spectral density as a fractional function with coefficients to be determined by the measured results of the overall root-mean-square of acceleration obtained from the satellite acoustic tests. The prediction precisions are compared among three design methods. It is shown that in contrast with the established methods, the modified method can reduce the prediction errors significantly and therefore a reasonable constraint can be set for the structure and mechanism optimization design of complicated spaceborne units.关键词
星载复杂组件/随机振动试验/载荷设计/加载方向/预示误差/载荷剪裁Key words
complicated spaceborne unit/random vibration test/load design/loading direction/prediction error/load tailoring分类
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王跃宇,周志成,王畅..星载复杂组件随机振动试验载荷设计方法改进[J].航天器环境工程,2018,35(1):44-48,5.
