RatioanlDMIS平面，圆，圆多点拟合坐标系
一般对于平面，圆，圆，可以直接使用3-2-1法，两点偏移队列坐标系。可以不使用多点拟合坐标系。
多点拟合坐标系（RPS坐标系）法：
这种方法适用于零件有特征可以测量或构造，零件的评价方法要在原始数模坐标系下，或数模坐标系比较复杂，直接用3-2-1法拟合难度大。
多点拟合坐标系，拟合算法：最小二乘法。
由于零件本身是存在有制造误差的，在实际拟合过程中这些误差是平均分配在每一个元素的坐标拟合中，所以这些元素在与数模拟合过程中的误差是平均分配的。所以拟合后会发现这些参与拟合的元素实测值与理论值都有偏差，这是正常的。
坐标系选用原则：
3-2-1法用于坐标系比较简单，在零件上建立3-2-1坐标系容易和数模坐标系一致的情况。
多点拟合坐标系法适合于数模坐标系不在数模上，而零件上有明显的适合最佳拟合的特征元素的情况。
对于RatioanlDMIS软件，RatioanlDMIS6.8版本以下存在一个问题，平面，圆，圆使用多点拟合坐标系法编写的程序，在线测量程序只能用一次。如下图：
对于RationalDMIS6.8版本，平面，圆圆，多点拟合坐标系法。脱机编程，测试，程序可以重复使用。实际联机，可以正常使用。
DMIS程序如下：
DMISMN/'Created by [山涧果子] on 星期五, 五月 25, 2018', 4.0
UNITS/MM, ANGDEC, MMPS
WKPLAN/XYPLAN
PRCOMP/ON
TECOMP/ON
FLY/1.000000
MODE/MAN
SNSET/APPRCH, 2.000000
SNSET/RETRCT, 2.000000
SNSET/DEPTH, 0.000000
SNSET/SEARCH, 10.000000
SNSET/CLRSRF, 50.000000
RECALL/D(MCS)
SNSLCT/S(ROOTSN1)
GEOALG/BF, LSTSQR
GEOALG/ANGLB, DEFALT
GEOALG/CIRCLE, LSTSQR
GEOALG/ARC, LSTSQR
GEOALG/PLANE, LSTSQR
$$
$$
MODE/MAN
F(PLN1)=FEAT/PLANE,CART,31.250000,46.787796,35.000000,0.000000,0.000000,1.000000
$$ Empty Meas Block
MEAS/PLANE, F(PLN1), 4
ENDMES
D(CRD1) = DATSET/FA(PLN1), ZDIR
D(CRD1) = TRANS/ZORIG, FA(PLN1)
D(CRD2) = TRANS/ZORIG, -35
F(CIR1)=FEAT/CIRCLE,INNER,CART,40.000000,55.000000,35.000000,0.000000,0.000000,1.000000, 45.000000
$$ Empty Meas Block
MEAS/CIRCLE, F(CIR1), 4
ENDMES
F(CIR2)=FEAT/CIRCLE,INNER,CART,72.000000,55.000000,35.000000,0.000000,0.000000,1.000000, 10.000000
$$ Empty Meas Block
MEAS/CIRCLE, F(CIR2), 4
ENDMES
DMESW/COMAND,'D(CRD3) = LOCATE/XYDIR, ZAXIS, $
FA(CIR1), XYZAXI, $
FA(CIR2), XYZAXI'
$$ Set.CAD2PCS.CADM_1
$$ Set.CADViewCenter.CADM_1
RECALL/D(CRD3)
$$
TEXT/OPER, '请将测头移动到安全位置！！！'
GOTO/14.911388, 36.296293, 186.104227
TEXT/OPER, '精建坐标系！！'
$$
MODE/PROG,MAN
F(PLN2) = FEAT/PLANE,CART, 31.250000,46.787796,35.000000, 0,0,1
$$ Measurement points are created through nominal points
MEAS/PLANE, F(PLN2), 4
GOTO/CART, 86.710542, 24.276517, 86.995705
PTMEAS/CART, 86.710542, 24.276517, 35.000000, 0.000000, 0.000000, 1.000000
PTMEAS/CART, 95.339790, 85.100271, 35.000000, 0.000000, 0.000000, 1.000000
PTMEAS/CART, 7.125045, 83.681479, 35.000000, 0.000000, 0.000000, 1.000000
PTMEAS/CART, 7.166105, 32.187330, 35.000000, 0.000000, 0.000000, 1.000000
GOTO/CART, 14.911224, 36.295591, 186.038027
ENDMES
D(CRD4) = DATSET/FA(PLN2), ZDIR
D(CRD4) = TRANS/ZORIG, FA(PLN2)
D(CRD5) = TRANS/ZORIG, -35
F(CIR3)=FEAT/CIRCLE,INNER,CART,40.000182,54.999206,33.000997,0.000006,-0.000024,1.000000, 45.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(CIR3), 4
GOTO/CART, 25.161246, 43.943255, 84.996517
GOTO/CART, 25.161235, 43.943303, 83.000813
PTMEAS/CART, 21.956668, 41.557421, 33.000773, 0.801928, 0.597421, 0.000000
GOTO/CART, 22.060077, 50.464720, 33.000987
GOTO/CART, 21.690413, 57.675268, 33.001162
GOTO/CART, 24.108246, 64.478410, 33.001313
PTMEAS/CART, 26.558397, 73.042721, 33.001505, 0.597421, -0.801928, 0.000000
GOTO/CART, 35.465696, 72.939311, 33.001453
GOTO/CART, 42.676244, 73.308975, 33.001422
GOTO/CART, 49.479386, 70.891142, 33.001327
PTMEAS/CART, 58.043697, 68.440991, 33.001220, -0.801928, -0.597421, -0.000000
GOTO/CART, 57.940288, 59.533692, 33.001007
GOTO/CART, 58.309951, 52.323144, 33.000831
GOTO/CART, 55.892119, 45.520002, 33.000681
PTMEAS/CART, 53.441967, 36.955691, 33.000488, -0.597421, 0.801928, -0.000000
GOTO/CART, 51.055159, 40.158780, 83.000579
ENDMES
F(CIR4)=FEAT/CIRCLE,INNER,CART,72.000182,54.999206,33.000820,0.000006,-0.000024,1.000000, 10.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(CIR4), 4
GOTO/CART, 51.049359, 40.170254, 84.996283
GOTO/CART, 73.004765, 54.997955, 84.996519
GOTO/CART, 73.004754, 54.998003, 83.000814
PTMEAS/CART, 77.000182, 54.999206, 33.000792, -1.000000, -0.000000, -0.000000
PTMEAS/CART, 72.000182, 49.999206, 33.000700, -0.000000, 1.000000, 0.000000
PTMEAS/CART, 67.000182, 54.999206, 33.000847, 1.000000, 0.000000, 0.000000
PTMEAS/CART, 72.000182, 59.999206, 33.000940, 0.000000, -1.000000, -0.000000
GOTO/CART, 72.000459, 56.002298, 83.000844
ENDMES
DMESW/COMAND,'D(CRD6) = LOCATE/XYDIR, ZAXIS, $
FA(CIR3), XYZAXI, $
FA(CIR4), XYZAXI'
$$ Set.CAD2PCS.CADM_1
$$ Set.CADViewCenter.CADM_1
RECALL/D(CRD6)
$$
TEXT/OUTFIL, 'DCC测量正式开始！！！'
$$ Set.OutputCtrl.Circle(XYZDT)
$$
MODE/PROG,MAN
SNSET/APPRCH, 2.0000
SNSET/RETRCT, 2.0000
SNSET/DEPTH, 0.0000
SNSET/SEARCH, 10.0000
SNSET/CLRSRF, 50.0000
F(J-1)=FEAT/CIRCLE,INNER,CART,8.000000,55.000000,32.000000,0.000000,-0.000000,1.000000, 10.000000
F(J-2)=FEAT/CIRCLE,INNER,CART,24.000000,27.287187,32.000000,-0.000000,0.000000,1.000000, 10.000000
F(J-3)=FEAT/CIRCLE,INNER,CART,56.000000,27.287187,32.000000,-0.000000,-0.000000,1.000000, 10.000000
F(J-4)=FEAT/CIRCLE,INNER,CART,72.000000,55.000000,32.000000,0.000000,-0.000000,1.000000, 10.000000
F(J-5)=FEAT/CIRCLE,INNER,CART,56.000000,82.712813,32.000000,0.000000,-0.000000,1.000000, 10.000000
F(J-6)=FEAT/CIRCLE,INNER,CART,24.000000,82.712813,32.000000,-0.000000,-0.000000,1.000000, 10.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-1), 4
GOTO/CART, 8.000000, 55.000000, 83.995705
PTMEAS/CART, 12.999370, 55.079339, 32.000000, -0.999874, -0.015868, -0.000000
PTMEAS/CART, 7.920661, 59.999370, 32.000000, 0.015868, -0.999874, -0.000000
PTMEAS/CART, 3.000630, 54.920661, 32.000000, 0.999874, 0.015868, 0.000000
PTMEAS/CART, 8.079339, 50.000630, 32.000000, -0.015868, 0.999874, 0.000000
GOTO/CART, 8.000000, 55.000000, 83.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-2), 4
GOTO/CART, 24.000000, 27.287187, 83.995705
PTMEAS/CART, 28.290137, 29.855206, 32.000000, -0.858027, -0.513604, -0.000000
PTMEAS/CART, 21.431981, 31.577324, 32.000000, 0.513604, -0.858027, 0.000000
PTMEAS/CART, 19.709863, 24.719168, 32.000000, 0.858027, 0.513604, 0.000000
PTMEAS/CART, 26.568019, 22.997050, 32.000000, -0.513604, 0.858027, -0.000000
GOTO/CART, 24.000000, 27.287187, 83.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-3), 4
GOTO/CART, 56.000000, 27.287187, 83.995705
PTMEAS/CART, 58.432103, 31.655811, 32.000000, -0.486421, -0.873725, -0.000000
PTMEAS/CART, 51.631376, 29.719290, 32.000000, 0.873725, -0.486421, 0.000000
PTMEAS/CART, 53.567897, 22.918563, 32.000000, 0.486421, 0.873725, 0.000000
PTMEAS/CART, 60.368624, 24.855084, 32.000000, -0.873725, 0.486421, -0.000000
GOTO/CART, 56.000000, 27.287187, 83.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-4), 4
GOTO/CART, 72.000000, 55.000000, 83.995705
PTMEAS/CART, 71.968892, 59.999903, 32.000000, 0.006222, -0.999981, -0.000000
PTMEAS/CART, 67.000097, 54.968892, 32.000000, 0.999981, 0.006222, 0.000000
PTMEAS/CART, 72.031108, 50.000097, 32.000000, -0.006222, 0.999981, 0.000000
PTMEAS/CART, 76.999903, 55.031108, 32.000000, -0.999981, -0.006222, -0.000000
GOTO/CART, 72.000000, 55.000000, 83.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-5), 4
GOTO/CART, 56.000000, 82.712813, 83.995705
PTMEAS/CART, 58.569564, 78.423601, 32.000000, -0.513913, 0.857842, 0.000000
PTMEAS/CART, 60.289212, 85.282377, 32.000000, -0.857842, -0.513913, 0.000000
PTMEAS/CART, 53.430436, 87.002025, 32.000000, 0.513913, -0.857842, -0.000000
PTMEAS/CART, 51.710788, 80.143249, 32.000000, 0.857842, 0.513913, -0.000000
GOTO/CART, 56.000000, 82.712813, 83.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(J-6), 4
GOTO/CART, 24.000000, 82.712813, 83.995705
PTMEAS/CART, 28.369468, 80.282227, 32.000000, -0.873894, 0.486117, -0.000000
PTMEAS/CART, 26.430586, 87.082281, 32.000000, -0.486117, -0.873894, -0.000000
PTMEAS/CART, 19.630532, 85.143399, 32.000000, 0.873894, -0.486117, 0.000000
PTMEAS/CART, 21.569414, 78.343345, 32.000000, 0.486117, 0.873894, 0.000000
GOTO/CART, 24.000000, 82.712813, 83.995705
ENDMES
T(TCOR1)=TOL/CORTOL,XAXIS,-0.020000,0.020000
T(TCOR2)=TOL/CORTOL,YAXIS,-0.020000,0.020000
$$ Set.OutputCtrl.Circle(XYDF)
OUTPUT/FA(J-1)
OUTPUT/FA(J-2)
OUTPUT/FA(J-3)
OUTPUT/FA(J-4)
OUTPUT/FA(J-5)
OUTPUT/FA(J-6)
F(P-1)=FEAT/CIRCLE,INNER,CART,40.000000,55.000000,27.000000,0.000000,-0.000000,1.000000, 20.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-1), 4
GOTO/CART, 46.004295, 55.000000, 78.995705
GOTO/CART, 46.004295, 55.000000, 77.000000
PTMEAS/CART, 50.000000, 55.000000, 27.000000, -1.000000, -0.000000, -0.000000
GOTO/CART, 45.547246, 52.702256, 27.000000
GOTO/CART, 44.245678, 50.754322, 27.000000
GOTO/CART, 42.297744, 49.452754, 27.000000
PTMEAS/CART, 40.000000, 45.000000, 27.000000, -0.000000, 1.000000, -0.000000
GOTO/CART, 37.702256, 49.452754, 27.000000
GOTO/CART, 35.754322, 50.754322, 27.000000
GOTO/CART, 34.452754, 52.702256, 27.000000
PTMEAS/CART, 30.000000, 55.000000, 27.000000, 1.000000, 0.000000, 0.000000
GOTO/CART, 34.452754, 57.297744, 27.000000
GOTO/CART, 35.754322, 59.245678, 27.000000
GOTO/CART, 37.702256, 60.547246, 27.000000
PTMEAS/CART, 40.000000, 65.000000, 27.000000, 0.000000, -1.000000, 0.000000
GOTO/CART, 40.000000, 61.004295, 77.000000
ENDMES
D(CRD7) = TRANS/XORIG, 40, YORIG, 55, ZORIG, 35
RECALL/D(CRD7)
F(P-2)=FEAT/CIRCLE,INNER,CART,32.000000,0.000000,-3.000000,0.000000,-0.000000,1.000000, 10.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-2), 4
GOTO/CART, -0.008073, 6.014106, 48.995705
GOTO/CART, 33.004295, 0.000000, 48.995705
GOTO/CART, 33.004295, 0.000000, 47.000000
PTMEAS/CART, 37.000000, 0.000000, -3.000000, -1.000000, -0.000000, -0.000000
PTMEAS/CART, 32.000000, -5.000000, -3.000000, -0.000000, 1.000000, -0.000000
PTMEAS/CART, 27.000000, 0.000000, -3.000000, 1.000000, 0.000000, 0.000000
PTMEAS/CART, 32.000000, 5.000000, -3.000000, 0.000000, -1.000000, 0.000000
GOTO/CART, 32.000000, 1.004295, 47.000000
ENDMES
F(P-3)=FEAT/CIRCLE,INNER,CART,16.000000,-27.712813,-3.000000,-0.000000,-0.000000,1.000000, 10.000000
F(P-4)=FEAT/CIRCLE,INNER,CART,-16.000000,-27.712813,-3.000000,-0.000000,0.000000,1.000000, 10.000000
F(P-5)=FEAT/CIRCLE,INNER,CART,-32.000000,0.000000,-3.000000,0.000000,-0.000000,1.000000, 10.000000
F(P-6)=FEAT/CIRCLE,INNER,CART,-16.000000,27.712813,-3.000000,-0.000000,-0.000000,1.000000, 10.000000
F(P-7)=FEAT/CIRCLE,INNER,CART,16.000000,27.712813,-3.000000,0.000000,-0.000000,1.000000, 10.000000
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-3), 4
GOTO/CART, 16.000000, -27.712813, 48.995705
PTMEAS/CART, 18.431792, -23.344016, -3.000000, -0.486358, -0.873759, -0.000000
PTMEAS/CART, 11.631203, -25.281021, -3.000000, 0.873759, -0.486358, 0.000000
PTMEAS/CART, 13.568208, -32.081610, -3.000000, 0.486358, 0.873759, 0.000000
PTMEAS/CART, 20.368797, -30.144605, -3.000000, -0.873759, 0.486358, -0.000000
GOTO/CART, 16.000000, -27.712813, 48.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-4), 4
GOTO/CART, -16.000000, -27.712813, 48.995705
PTMEAS/CART, -11.709949, -25.144650, -3.000000, -0.858010, -0.513633, -0.000000
PTMEAS/CART, -18.568163, -23.422762, -3.000000, 0.513633, -0.858010, 0.000000
PTMEAS/CART, -20.290051, -30.280976, -3.000000, 0.858010, 0.513633, 0.000000
PTMEAS/CART, -13.431837, -32.002864, -3.000000, -0.513633, 0.858010, -0.000000
GOTO/CART, -16.000000, -27.712813, 48.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-5), 4
GOTO/CART, -32.000000, -0.000000, 48.995705
PTMEAS/CART, -27.000631, 0.079409, -3.000000, -0.999874, -0.015882, -0.000000
PTMEAS/CART, -32.079409, 4.999369, -3.000000, 0.015882, -0.999874, -0.000000
PTMEAS/CART, -36.999369, -0.079409, -3.000000, 0.999874, 0.015882, 0.000000
PTMEAS/CART, -31.920591, -4.999369, -3.000000, -0.015882, 0.999874, 0.000000
GOTO/CART, -32.000000, -0.000000, 48.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-6), 4
GOTO/CART, -16.000000, 27.712813, 48.995705
PTMEAS/CART, -11.630546, 25.282202, -3.000000, -0.873891, 0.486122, -0.000000
PTMEAS/CART, -13.569389, 32.082267, -3.000000, -0.486122, -0.873891, -0.000000
PTMEAS/CART, -20.369454, 30.143424, -3.000000, 0.873891, -0.486122, 0.000000
PTMEAS/CART, -18.430611, 23.343359, -3.000000, 0.486122, 0.873891, 0.000000
GOTO/CART, -16.000000, 27.712813, 48.995705
ENDMES
$$ Measurement points are created through nominal points
MEAS/CIRCLE, F(P-7), 4
GOTO/CART, 16.000000, 27.712813, 48.995705
PTMEAS/CART, 18.569366, 23.423482, -3.000000, -0.513873, 0.857866, 0.000000
PTMEAS/CART, 20.289331, 30.282179, -3.000000, -0.857866, -0.513873, -0.000000
PTMEAS/CART, 13.430634, 32.002144, -3.000000, 0.513873, -0.857866, -0.000000
PTMEAS/CART, 11.710669, 25.143447, -3.000000, 0.857866, 0.513873, 0.000000
GOTO/CART, 16.000000, 27.712813, 48.995705
ENDMES
F(PLN3)=FEAT/PLANE,CART,-8.750000,-8.212204,0.000000,0.000000,0.000000,1.000000
$$ Measurement points are created through nominal points
MEAS/PLANE, F(PLN3), 10
GOTO/CART, 15.991227, 27.725206, 51.995705
GOTO/CART, -25.487044, 0.812766, 51.995705
PTMEAS/CART, -25.487044, 0.812766, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, -20.046645, -15.760141, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, -5.226197, -24.958703, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, 12.039646, -22.478811, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, 23.672005, -9.480833, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, 24.227970, 7.953332, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, 13.447398, 21.666044, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, -3.625360, 25.240974, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, -19.001772, 17.005371, 0.000000, 0.000000, -0.000000, 1.000000
PTMEAS/CART, -25.487044, 0.812766, 0.000000, 0.000000, -0.000000, 1.000000
ENDMES
GOTO/-25.493718, 0.825657, 54.007975
