The knot factor method and its applications in blade measurement |
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| Institution: | 1. National Institute for Laser, Plasma and Radiation Physics, Laser Department, 409 Atomistilor, P.O. Box MG-36, 077125 Bucharest-Magurele, Romania;2. University of Bucharest, Faculty of Physics, 405 Atomistilor, P.O. Box MG-11, 077125, Bucharest-Magurele, Romania;3. Academy of Romanian Scientists, 54 Splaiul Independenţei, Bucharest, Romania |
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| Abstract: | Blade measurement is a key technique and a hard nut to crack in aero-compressor manufacturing. This paper analyses the law of the knot vector's influence on NURBS interpolation curve, proposes a Knots Factor Method (KFM) to meet the needs of interpolation of the discrete points in blade measurement. Using the theoretic points and characteristic parameter, knot factors and mathematic models are constructed to fit the blade surface using the KFM. Based on the models and the discrete blade surface points, the blade characteristic parameter is evaluated. The results of the experiment show that the KFM is an effective method to fit the discrete points in blade measurement. |
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