力限控制在振动试验中的应用研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (6) : 105-108.

论文

力限控制在振动试验中的应用研究

陈章位1 文祥1 周建川2 贺惠农3

作者信息 +

Application research of force limited control in vibration test

CHEN Zhang-wei1 WEN Xiang1 ZHOU Jian-chuan2 HE Hui-nong3

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文章历史 +

摘要

传统航天器加速度响应控制振动试验是根据特定的加速度规范，控制振动台台面加速度，这种试验方法会在试件固有频率处产生过试验现象，力限振动试验可以有效地缓解这种过试验.本文基于简单二自由度模型给出了详细计算力限条件的方法，在此方法基础上,推导出了航天器试件支架与振动台台面间力谱和加速度谱，并对试件支架进行力限正弦振动试验和力限随机振动试验，实验结果表明：与传统加速度响应控制方法相比，基于简单二自由度模型力谱条件的力限振动控制试验能够更加真实模拟动力学环境，有效缓解振动过试验，可以为航天器振动试验提供很好的试验依据。

Abstract

Abstract: Traditional vibration tests based on the acceleration response control are intended to control the platform acceleration of shaker according to specified acceleration specification, which leads to over testing phenomenon in natural frequency of testing article, fortunately, Force limited vibration test is able to mitigate that tendency. Detailed calculations of force limitation specification are presented on the basis of simple Two-Degree-of-Freedom System (TDFS), furthermore, force spectrum and acceleration spectrum between spacecraft bracket and shaker platform are also derived from that way, meanwhile, force limited random vibration and force limited sine vibration are carried out for spacecraft bracket, experimental results indicate that force limited vibration test in terms of force spectrum deriving from simple TDFS can simulate the realistic dynamic environment better than conventional acceleration response control vibration test does, and over testing tendency can be alleviated effectively, thus those results will offer a good verification for spacecraft vibration test.

导出引用

陈章位文祥周建川贺惠农 . 力限控制在振动试验中的应用研究 [J]. 振动与冲击, 2013, 32(6): 105-108

CHEN Zhang-wei WEN Xiang ZHOU Jian-chuan HE Hui-nong. Application research of force limited control in vibration test[J]. Journal of Vibration and Shock, 2013, 32(6): 105-108