| 基于B样条的水泵效率特性曲线拟合方法 |
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| 引用本文： | 张林,于永海,姜晓明. 基于B样条的水泵效率特性曲线拟合方法[J]. 排灌机械, 2006, 24(3): 9-11,16 |
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| 作者姓名： | 张林 于永海 姜晓明 |
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| 作者单位： | 河海大学,江苏,南京,210098 |
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| 摘 要： | 探索了基于三次均匀B样条的水泵效率特性曲线的拟合方法，以解决用一般的水泵效率特性曲线拟合方法存在的拟合精度不高或曲线形状畸变的问题．在给定分段节点横坐标的条件下．通过确定系数矩阵和反求曲线顶点，基于最小二乘法推导出最优节点的纵坐标公式．实例计算表明，采用该方法可以较好地拟合水泵效率特性曲线．
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| 关 键 词： | 水泵 效率特性 B样条 曲线拟合 |
| 文章编号： | 1005-6254（2006）03-0009-03 |
| 收稿时间： | 2006-03-13 |
| 修稿时间： | 2006-03-13 |
Fitting method for pump efficiency characteristic curve based on B-spline |
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| ZHANG Lin,YU Yong-hai,JIANG Xiao-ming. Fitting method for pump efficiency characteristic curve based on B-spline[J]. Drainage and Irrigation Machinery, 2006, 24(3): 9-11,16 |
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| Authors: | ZHANG Lin YU Yong-hai JIANG Xiao-ming |
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| Affiliation: | 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 methods. 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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| Keywords: | pump efficiency characteristic B-spline curve fitting |
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