基于曲率优化的杆件弯扭变形精度提升方法  

Method to Improve the Bending and Torsional Deformation Accuracy Based on Curvature Information Optimization

作　　者：李翔宇[1,2] 曾捷 邵敏强[1] 常斌[3] LI Xiangyu;ZENG Jie;SHAO Minqiang;CHANG Bin(State Key Laboratory of Mechanical Structure Mechanics and Control,Nanjing University of Aeronautics and Astronautics Nanjing,210016,China;AVIC China Aero-Polytechnology Establishment Beijing,100028,China;Aviation Key Laboratory of Science and Technology on Fault Diagnosisand Health Management,Shanghai Aero Mesurement&Control Technology Reasearch Institute Shanghai,201601,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]中国航空综合技术研究所,北京100028 [3]上海航空测控技术研究所故障诊断与健康管理技术航空科技重点实验室,上海201601

出　　处：《振动．测试与诊断》2022年第2期263-269,406,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：航空科学基金资助项目(20170252004);上海航天科技创新基金资助项目(SAST2018-015);江苏省重点研发计划资助项目(BE2018047);江苏高校优势学科建设工程基金资助项目。

摘　　要：航空航天器结构在长期服役过程中,受到各种因素影响,存在各种飞行安全问题。针对连杆结构服役过程中存在的扭转弯曲工况,提出一种曲率信息计算优化方法,借助光纤Bragg传感器反演结构扭转弯曲变形。此方法能够减小杆件弯扭变形过程中因光栅栅区尺寸因素导致的数据测量误差,进而提升变形反演精度提升。ANSYS Workbench有限元仿真结果表明,这种方法与传统曲率递推变形反演方法相比,能够将扭转/弯曲变形条件下杆件变形监测与反演平均误差减小8%。小角度扭转/弯曲试验结果显示,进行曲率信息计算优化方法修正后反演所得变形量相对误差较修正前减小3.3%。研究结果表明,所提方法适用于杆件结构扭转变形监测场合,能够为未来航空器结构服役状态感知与自适应调整提供帮助。Aerospace vehicle structure is affected by various factors and there are various flight safety problems in the long-term service process.With the help of fiber Bragg grating sensors,this paper proposes an optimization method for the calculation of curvature information aiming at the torsional and rotational bending conditions of the connecting rod structure.This method can reduce the data measurement error caused by the size of the grating grid area during the bending and torsion deformation of the rod,and thus improve the accuracy of deformation inversion.Moreover,ANSYS Workbench simulation results show that this method can reduce the average error of rod deformation monitoring and inversion under torsion/bending deformation by about8%.The relative error before and after the optimization algorithm is reduced by 3.3%.Therefore.the research results show that the method is applicable to the monitoring of torsional deformation of member structures,and it can provide assistance for the service status perception and adaptive adjustment of future aircraft structures.

关 键 词：连杆结构 光纤Bragg传感器 弯扭变形 曲率信息计算优化 

分 类 号：TH741[机械工程—光学工程] TP311.1[机械工程—仪器科学与技术]