桨叶挥舞弯矩动态修正数字镜像修复方法研究

Research on Dynamic Correction Digital Image Repair Method for Blade Flapping Bending Moment

中文关键词:  直升机  桨叶  挥舞弯矩  动态线性  镜像  修复

英文关键词:helicopter  blade  flapping bending moment  dynamic linear  image  repair

中文摘要:

      针对直升机旋翼载荷测量飞行试验中因测试系统故障而引起的桨叶挥舞弯矩测试数据无效问题，提出了一种稳态工况动态线性修正数字镜像修复的新方法。基于桨叶挥舞弯矩产生机理和相关特性，构建动态线性修正数字镜像修复模型，通过分析样例桨叶飞行试验有效测试数据的特性及其相关性特征，利用备份桨叶相同展向站位的有效数据，确立不同稳态工况整周期动态线性修正因子，最后采用样例桨叶实测数据验证了这种方法的合理性和有效性。该方法为挖掘与分析含无效数据信道的桨叶试验测量的结构载荷特性提供了一种可行的新方案。

英文摘要:

      Aiming at the invalidity of the blade flapping bending moment test data caused by the failure of the test system in the helicopter rotor load measurement flight test,a new method of dynamic linear correction digital image repair under steady state conditions is proposed.Based on the generation mechanism and related characteristics of blade flapping bending moment,a dynamic linear correction digital image repair model is constructed.By analyzing the characteristics and correlation characteristics of the effective test data of the sample blade flight test,and using the effective data of the same spanwise position of the backup blade,the dynamic linear correction factors of the whole cycle under different steady state conditions are established.Finally,the validity and rationality of the method are verified by using the measured data of the sample blade.It provides a feasible new scheme for mining and analyzing structural load characteristics measured by blade test with invalid data channels.