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| Fitting method for pump efficiency characteristic curve based on B-spline |
| ZHANG Lin, YU Yong-hai, JIANG Xiao-ming |
| Hohai University, Nanjing, Jiangsu 210098, China |
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Abstract A fitting method for pump efficiency characteristic curve based on cublic uniform B-spline is presented in this paper to overcome inaccuracy or curve shape distortion occurred by other fitting me-(thods.)The optimum knots ordinate formula in the least square sense is derived by computing coefficient matrix and curve vertexes under the specified subsection knots abscissas conditions.It is proved with the example that the new method works well for water pump efficiency characteristic curve fitting.
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Received: 08 August 2013
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