基于离散曲率算法的镗刀杆变形曲线拟合  

Curve Fitting of Boring Bar Distortion Based on Discrete Curvature Algorithm

作　　者：沈赓 张庆军 

机构地区：[1]中国葛洲坝集团机械船舶有限公司,湖北宜昌443002

出　　处：《机械工程师》2008年第9期123-125,共3页Mechanical Engineer

摘　　要：文中推导出一种在已知平面曲线离散曲率的情况下拟合出曲线图形的线性拟合算法,该算法在曲线较为复杂曲率呈明显非线性时具有较大误差,因此又在此基础上推导了另一种精度更高且适用性更广的样条插值算法,并对两种方法的精度加以比较。应用MATLAB编程后,两个算例结果表明其精度可以满足杆弯曲变形分析要求。This paper deduces a linear curve fitting method based on the situation with the discrete curve rates known. This method has some backwards such as comparatively serious errors in the situation that the curve is complicated or the curve rate is obviously non-linear, so another method called spline is worked out ,which has such advantages as high precision and wide appropriation, Then the two methods are compared in precision by using the MATLAB program, the conclusion is that the precision can meet the requirements of analysis in axis deformation comparatively well .

关 键 词：离散曲率 曲线拟合 MATLAB编程 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]