Texas Instruments TIDA-060040, Manual

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Rotation Angle (deg)
A
ngle E
rror (d
eg)
0 45 90 135 180 225 270 315 360
-4
-3.6
-3.2
-2.8
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
Natural Error
1st Harmonic Approximation
Figure 3-7. First Harmonic Approximation
Rotation Angle (deg)
A
ngle E
rror (d
eg)
0 45 90 135 180 225 270 315 360
-4
-3.6
-3.2
-2.8
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
Natural Error
2nd Harmonic Approximation
Figure 3-8. Second Harmonic Approximation
Rotation Angle (deg)
A
ngle E
rror (d
eg)
0 45 90 135 180 225 270 315 360
-4
-3.6
-3.2
-2.8
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
Natural Error
3rd Harmonic Approximation
Figure 3-9. Third Harmonic Approximation
For all of the test results, the data was captured at 0.25° intervals and analyzed for harmonic reduction.
To achieve consistent results in a real manufacturing environment, some degree of calibration for each system is
likely necessary as each unit would exhibit slight variations in the various mechanical tolerances.
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