Parker Hannifin
- 54 - Aries Controller Hardware Installation Guide
Performance Measurements
If you plot of the position response versus time, you can make a few
measurements to quantitatively assess the performance of the servo. These
three measurements are made before or shortly after the motor stops
moving:
• Overshoot—The measurement of the maximum magnitude that the
actual position exceeds the position setpoint. It is usually measured in
terms of the percentage of the setpoint value.
• Rise Time—The time it takes the actual position to pass the setpoint.
• Settling Time—The time between when the commanded position
reaches the setpoint and the actual position settles within a certain
percentage of the position setpoint. (Note the settling time definition
here is different from that of a control engineering text book, but the
goal of the performance measurement is still intact.)
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