航空发动机叶片损伤自动测量方法研究

摘要

The visual inspection based on endoscope has played an important role in modern fault diagno-sis of aero engines .An automatic measurement method based on cubic spline interpolation is given to typi-cal damage of the aero engine lamina in this paper .Firstly,this method is subjected to image preprocess-ing for damage lamina .The outline of lamina is extracted .Secondly ,cubic spline function is used to inter-polation and calculation .Through analysis of the first derivative and the second derivative to get the dam-age size .Based on this method ,automatic intelligent diagnosis expert system combined with fault diagnosis method has developed .The comparative experiment is used to verify the effectiveness of the method .%基于内窥镜的视觉检测技术在现代航空发动机故障诊断中发挥着重要的作用。针对航空发动机叶片的典型损伤，提出了一种基于三次样条插值的自动测量方法。对损伤叶片进行图像预处理并提取叶片轮廓，利用三次样条函数进行插值计算，通过对一次导数和二次导数的分析得到损伤尺寸。结合故障诊断方法，开发了航空发动机智能诊断专家系统。通过实验对比，证明了方法的有效性和正确性。