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一种单自由度振动系统动态载荷识别方法
引用本文:武江凯,白明生,张永.一种单自由度振动系统动态载荷识别方法[J].航天器环境工程,2016,33(2):136-140.
作者姓名:武江凯  白明生  张永
作者单位:中国空间技术研究院载人航天总体部, 北京 100094;中国空间技术研究院载人航天总体部, 北京 100094;中国空间技术研究院载人航天总体部, 北京 100094
摘    要:航天器在飞行过程中经历了复杂的力学环境,但是目前又无法直接测量出这种复杂力学载荷函数。针对这一问题,提出了一种应用力学载荷识别方法确定航天器所经受力学载荷的新方法,针对单自由度振动系统模型,以二次多项式为基函数,推导建立了基于Duhamel积分的动态载荷识别模型。仿真分析结果表明,该方法具有很高的识别精度,且不存在误差积累问题。该方法为下一步试验验证和工程应用提供了理论基础和技术支撑。

关 键 词:复杂力学环境  载荷识别  Duhamel积分  二次多项式
收稿时间:2015/8/17 0:00:00
修稿时间:3/4/2016 12:00:00 AM

The danamic load identification for a single-degree-of-freedom vibration system
Wu Jiangkai,Bai Mingsheng and Zhang Yong.The danamic load identification for a single-degree-of-freedom vibration system[J].Spacecraft Environment Engineering,2016,33(2):136-140.
Authors:Wu Jiangkai  Bai Mingsheng and Zhang Yong
Institution:Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China;Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China;Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China
Abstract:The spacecraft is in a complicated mechanical environment, and its external load can not be measured directly. So a mechanical load identification method is proposed for spacecraft during the flight phase. Based on the Duhamel''s integration, with the second order polynomial as the base function, the dynamic load identification mode for a single-degree-of-freedom vibration system is built. The simulation results show that this method has a high identification precision and the problem of error accumulation is solved. The method can provide theoretical bases and technological supports for the test validation and engineering applications.
Keywords:complicated mechanical environment  load identification  Duhamel''s integration  quadratic polynomial
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