典型文献
Nonlinear system identification framework of folding fins with freeplay using backbone curves
文献摘要：
Due to wear and manufacturing tolerance,the freeplay is unavoidable in the hinges of folding fins,which exerts significant effects on the aerodynamic characteristics.This paper proposes a backbone-curve-based framework for the dynamical identification of folding fins containing the freeplay nonlinearity.With no need to measure the input force signal and the response signals of nonlinear related Degrees of Freedom(DOFs),the proposed method is more direct and elegant than most existing nonlinear identification approaches,and it contains three steps:Firstly,the underlying linear model of the folding fin structure is obtained through the modal test on its linear sub-parts,and then,the harmonic approximation solves the analytical expressions of the backbone curves of measurable DOFs.Secondly,response data measured from the sine-sweep test are used to extract the fitting points of backbone curves for these DOFs.Finally,the curve fitting approach is applied to identify the freeplay parameters.A series of numerical experiments verify the effective-ness of the proposed method.A real-life folding fin structure is also employed to illustrate how the method can be applied.These examples demonstrate that the identification framework can give an accurate dynamic model of the folding fin structure.
文献关键词：
中图分类号：
作者姓名：
Shuaishuai LIU;Rui ZHAO;Kaiping YU;Bowen ZHENG
作者机构：
Department of Astronautical Science and Mechanics,Harbin Institute of Technology,Harbin 150001,China
文献出处：
引用格式：
[1]Shuaishuai LIU;Rui ZHAO;Kaiping YU;Bowen ZHENG-.Nonlinear system identification framework of folding fins with freeplay using backbone curves)[J].中国航空学报（英文版）,2022(10):183-194
A类：
freeplay
B类：
Nonlinear,system,identification,framework,folding,fins,using,backbone,curves,Due,wear,manufacturing,tolerance,unavoidable,hinges,which,exerts,significant,effects,aerodynamic,characteristics,This,paper,proposes,dynamical,containing,nonlinearity,With,need,input,force,response,signals,related,Degrees,Freedom,DOFs,proposed,method,more,direct,elegant,than,most,existing,approaches,contains,three,steps,Firstly,underlying,model,structure,obtained,through,modal,test,its,sub,parts,then,harmonic,approximation,solves,analytical,expressions,measurable,Secondly,data,measured,from,sine,sweep,are,used,extract,fitting,points,these,Finally,applied,identify,parameters,series,numerical,experiments,verify,effective,ness,real,life,also,employed,illustrate,how,be,These,examples,demonstrate,that,give,accurate
AB值：
0.549322
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
