水轮机特性曲线的三次B样条拟合及优化  

Cubic B-spline Fitting and Optimization of Characteristic Curve of Turbine

作　　者：王立闯[1] 张蓉生[1] 刘泽[1] 张友才[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210098

出　　处：《水电能源科学》2011年第3期137-138,191,共3页Water Resources and Power

摘　　要：针对传统B样条对水轮机特性曲线拟合精度较低的现状,提出采用优化的三次B样条曲线对水轮机模型综合特性曲线进行逼近计算,利用像素单位转化及正交投影误差判断处理数据,取得了良好的曲线拟合效果。对等效率闭合曲线HL240D41_CurveID_42数据的拟合,验证了该方法可行有效。Aiming at the low precision status of characteristic curve of turbine with traditional B-spline fitting,optimal cubic B-spline curve is applied to calculate the characteristic curve of model turbine approximatively.Curve fitting effect is good.The data are dealt with transformation of pixels and judgment of orthogonal projection errors,which makes the curve fitting effect well.The feasibility is verified by fitting of HL240D41_CurveID_42 closed contour efficiency curve.

关 键 词：三次B样条曲线 坐标网格处理 逼近误差计算 曲线逼近 

分 类 号：TV734.1[水利工程—水利水电工程]