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. 2018 Aug 9;18(8):2616. doi: 10.3390/s18082616

Table 3.

Elements of the rotation matrix (unity values) of the inertial measurement unit (IMU) axes when rotated 360° around its axes.

R 11 R 21 R 31 R 12 R 22 R 23 R 31 R 32 R 33
Rotation around XIMU axis 1 −0.9677 −0.2519 0.0075 0.2520 −0.9677 0.0016 0.0069 0.0034 1.0000
2 −0.9666 −0.2564 0.0047 0.2043 −0.7588 0.6184 −0.1550 0.5987 0.7858
3 −0.9712 −0.2379 0.0100 0.0324 −0.0907 0.9953 −0.2359 0.9670 0.0958
4 −0.9648 −0.2629 0.0087 −0.1361 0.5273 0.8387 −0.2251 0.8080 −0.5446
5 −0.9658 −0.2592 0.0089 −0.2592 0.9658 −0.0031 −0.0078 −0.0053 −1.0000
6 −0.9621 −0.2724 −0.0124 −0.2100 0.7690 −0.6038 0.1740 −0.5783 −0.7971
7 −0.9678 −0.2516 0.0068 −0.0076 0.0021 −1.0000 0.2516 −0.9678 −0.0040
8 −0.9609 −0.2767 0.0093 0.1981 −0.7106 −0.6751 0.1934 −0.6469 0.7376
Rotation around YIMU axis 1 −0.9781 −0.2078 0.0101 0.2079 −0.9782 −0.0007 0.0100 0.0014 0.9999
2 −0.7457 −0.1457 0.6501 0.1863 −0.9825 −0.0065 0.6397 0.1163 0.7598
3 −0.0274 −0.0149 0.9995 0.2218 −0.9751 −0.0085 0.9747 0.2214 0.0300
4 0.5493 0.0849 0.8313 0.1682 −0.9857 −0.0105 0.8185 0.1456 −0.5557
5 0.9734 0.2285 0.0137 0.2287 −0.9735 −0.0088 0.0113 0.0117 −0.9999
6 0.6635 0.1952 −0.7223 0.2716 −0.9624 −0.0107 −0.6972 −0.1891 −0.6915
7 −0.0141 0.0002 −0.9999 0.2889 −0.9574 −0.0042 −0.9573 −0.2889 0.0134
8 −0.7845 −0.1990 −0.5873 0.2443 −0.9697 0.0022 −0.5700 −0.1418 0.8094
Rotation around ZIMU axis 1 −0.9722 −0.2340 0.0077 0.2340 −0.9722 −0.0020 0.0080 −0.0001 1.0000
2 −0.8729 0.4878 0.0108 −0.4878 −0.8730 0.0022 0.0105 −0.0034 0.9999
3 −0.3076 0.9515 0.0100 −0.9515 −0.3076 −0.0037 −0.0005 −0.0107 0.9999
4 0.4668 0.8841 0.0221 −0.8842 0.4671 −0.0087 −0.0180 −0.0154 0.9997
5 0.9621 0.2717 0.0233 −0.2718 0.9624 0.0025 −0.0218 −0.0088 0.9997
6 0.8910 −0.4536 0.0194 0.4537 0.8912 0.0014 −0.0179 0.0075 0.9998
7 0.3463 −0.9380 0.0186 0.9380 0.3464 0.0072 −0.0132 0.0150 0.9998
8 −0.4209 −0.9071 0.0099 0.9071 −0.4208 0.0092 −0.0042 0.0128 0.9999