基于机构随机振动分析的载荷谱非参数上限统计归纳方法对比研究  

Comparative Study on Non-Parametric Upper Limit Statistical Induction of Load Spectrum Based on Random Vibration Response of Mechanism

作　　者：冯志杰 肖慧婷 杨永锋[2] Feng Zhijie;Xiao Huiting;Yang Yongfeng(Aviation Key Laboratory of Science and Technology on Life-Support Technology,AVIC Aerospace Life-Support Industries,LTD.,Xiangyang 441000,China;Northwestern Polytechnic University,Xi’an 710072,China)

机构地区：[1]航空工业航宇救生装备有限公司航空防护救生技术航空科技重点实验室,湖北襄阳441000 [2]西北工业大学,陕西西安710072

出　　处：《航空科学技术》2022年第7期120-126,共7页Aeronautical Science & Technology

基　　金：航空科学基金(20182953025)。

摘　　要：基于随机振动分析,本文研究了机构部件在振动环境下动力学响应的获取方法。针对传统参数归纳法仅适用于服从正态分布数据集归纳的问题,采用了非参数上限统计归纳方法对不服从正态分布的机构部件不同测点响应数据集进行归纳。基于估计量的无偏性和有效性,比较了不同方法得出估计量的优劣性。以某型弹射座椅椅载设备为例,对弹射座椅进行了动力学分析,获取了程序控制器不同测点位置的响应,并对其进行了统计归纳,最终得出了不同非参数上限统计归纳方法所适用的情况。Based on random vibration analysis,the method of obtaining dynamic response of mechanism components under vibration environment is studied.Considering the traditional parametric induction method is only suitable for data sets that follow normal distribution,the non-parametric upper limit statistical inductive method is utilized to summarize the response data sets of different measuring points on the mechanism components that do not subject to normal distribution.Unbiasedness and validity of the estimators are adopted to compare the advantages and disadvantages of the estimators obtained by different inductive methods.Taking a certain type of ejection seat as an example,the dynamic analysis of the ejection seat is carried out,the responses of different points of the program controller are obtained,and the obtained responses are summarized.Finally,the applicable situations of different inductive methods are provided.

关 键 词：随机振动 非参数上限统计 弹射座椅 无偏性 有效性 

分 类 号：V268.2[航空宇航科学与技术—航空宇航制造工程]