ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Inspection Method of Blade Shape Based on Digitized Template with Design Tolerance Constraints
Received date: 2012-11-29
Revised date: 2013-01-08
Online published: 2013-01-15
Supported by
National Basic Research Program of China (2013CB035802);Research Fund for the Doctoral Program of Higher Education of China (20106102120023);China Postdoctoral Science Foundation (2012M512028)
To deal with the error evaluation and inspection of aero-engine blade airfoils using coordinate measuring machine (CMM), a new inspection method of digitized template considering design tolerances is proposed for cross-sectional error evaluation with high precision and rapid speed. Based on the principle of certified reference template inspection, the complicated relationship among three kinds of tolerances is discussed and the constraints are established. In addition, a digitized template is constructed according to the CAD design model, and then a mathematical matching model with tolerance constraints is built to accomplish precise matching between the measurement points and digitized template. In order to obtain the solution of the model, an algorithm of quasi-Newton method is applied for precise matching. Simulation test and practical example prove that the proposed method is more precise and reliable than the least squares (LSQ) method and the result coincides with that from the certified reference template inspection well.
HU Shulong , ZHANG Dinghua , ZHANG Ying , WU Baohai . Inspection Method of Blade Shape Based on Digitized Template with Design Tolerance Constraints[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(10) : 2411 -2418 . DOI: 10.7527/S1000-6893.2013.0053
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