1、 1 用多项式拟合不同转速与磁牵引力的依赖关系，确定其函数形式和相关系数。6.5 7 7.5 8 8.5 9 9.5 100.50.550.60.650.70.75不 不 / r/min不不不不/N不 不 不 不 不 不 不 不 不 不 不 不 不 不Linear model Poly3:f(x) = p1*x3 + p2*x2 + p3*x + p4Coefficients (with 95% confidence bounds):p1 = -0.001384 (-0.001938, -0.0008304)p2 = 0.03413 (0.0206, 0.04767)p3 = -0.2041
2、(-0.3131, -0.09513)p4 = 0.7714 (0.482, 1.061)Goodness of fit:SSE: 1.059e-005R-square: 0.9999Adjusted R-square: 0.9999RMSE: 0.001085得拟合函数式是 f(x) = 0.001384*x3 + 0.03413*x2 0.2041 *x + 0.7714 相关系数为 R= =0.99999.02 . 用多项式拟合不同转速与磁悬浮力的依赖关系，确定其函数形式和相关系数。6.5 7 7.5 8 8.5 9 9.5 100.050.060.070.080.090.1不 不 /
3、r/min不不不不/N不 不 不 不 不 不 不 不 不 不 不 不 不 不Linear model Poly3:f(x) = p1*x3 + p2*x2 + p3*x + p4Coefficients (with 95% confidence bounds):p1 = -2.813e-005 (-0.0001913, 0.000135)p2 = 0.001518 (-0.002466, 0.005503)p3 = -0.002954 (-0.03505, 0.02914)p4 = 0.009022 (-0.07619, 0.09424)Goodness of fit:SSE: 9.185e-
4、007R-square: 0.9998Adjusted R-square: 0.9997RMSE: 0.0003195得 拟合函数为 f(x) = 2.813e-005 *x3 + 0.001518 *x2 0.002954 *x + 0.009022 相关系数为 R= =0.9998597.03. 用数学公式进行拟合铝盘不同转速对轴承转速的依赖关系，确定其函数形式和相关系数。6.5 7 7.5 8 8.5 9 9.5 101618202224262830不 不 不 不 / r/min不不不不/r/min 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不Linear
5、model Poly2:f(x) = p1*x2 + p2*x + p3Coefficients (with 95% confidence bounds):p1 = -0.03459 (-0.2024, 0.1332)p2 = 4.717 (1.982, 7.453)p3 = -12.62 (-23.59, -1.656)Goodness of fit:SSE: 1.101R-square: 0.9982Adjusted R-square: 0.9979RMSE: 0.3318得 拟合函数为 f(x) = 0.03459 *x2 + 4.717*x 12.62相关系数为 R= =0.99909
6、7.04 拟合磁牵引力和磁悬浮力随距离改变的变化规律。1 1.5 2 2.5 3 3.5 4 4.5 50.20.40.60.811.21.4不 不 /mm不不不不/N不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不General model Exp2:f(x) = a*exp(b*x) + c*exp(d*x)Coefficients (with 95% confidence bounds):a = 2.039 (0.768, 3.31)b = -1.652 (-4.109, 0.8043)c = 0.7932 (-0.5567, 2.143)d = -0.3058 (-0
7、.7232, 0.1116)Goodness of fit:SSE: 0.008992R-square: 0.9921Adjusted R-square: 0.9862RMSE: 0.04741得拟合函数是 f(x) = 2.039*exp(1.652*x) + 0.7932 *exp(0.3058*x)相关系数是 R= =0.99319862.01 1.5 2 2.5 3 3.5 4 4.5 50.020.040.060.080.10.120.140.16不 不 /mm不不不不/N不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不General model Exp2:f(x)
8、 = a*exp(b*x) + c*exp(d*x)Coefficients (with 95% confidence bounds):a = 0.129 (-0.01001, 0.2679)b = -1.365 (-4.003, 1.273)c = 0.1514 (-0.06232, 0.3651)d = -0.4064 (-0.7165, -0.0964)Goodness of fit:SSE: 3.735e-005R-square: 0.998Adjusted R-square: 0.9965RMSE: 0.003056得拟合函数是 f(x) = 0.129 *exp(1.365*x) +0.1514 *exp(0.4064*x)相关系数是 R= =0.99825965.0
