Matching Algorithm for Profile Error Calculation of Blade Surface

Abstract:

The blade is one of the key part of aero engine because its shape precision and surface quality significantly influence the performance, efficiency and reliability of the engine. The blade surface is generally obtained by precision finishing process, which is a repeated work of profile error measurement, profile error calculation and error correction manufacturing. For profile error calculation, the matching of measurement points and ideal blade surface must be firstly performed. However there is few detailed work reported on matching algorithm. In this paper, a new matching algorithm for profile error calculation was proposed. Firstly, the coarse matching method based on characteristics of blade section curves between measurement points and its corresponding ideal section curve was studied. Then the Sigular Value Decomposition (SVD)-Iterative Closest Point (ICP) precision matching method was adopted to improve the matching precision. After that, the weight calculation method was applied to balance the profile errors among different section curves. Simulation work was performed to validate the proposed matching algorithm. Results shows that micrometer-order matching accuracy of the blade section curves could be obtained through the above-mentioned three matching steps.

• Periodical: Advanced Materials Research (Volume 1136)
• Pages: 630-635
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1136.630
• Online since: January 2016
• Authors: Xu Yang, Xiao Long Liu, Ji Ming Liu, Shi Jun Ji, Xing Tian Qu*, Zhi Yu Zhang
• Keywords: Blade Surface, Matching Algorithm, Profile Error Calculation, Section Curve

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