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MTS Series 793 User Manual

Page 43

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About Tuning

MTS Series 793 Tuning and Calibration

Introduction

43

A square waveform is best suited to view the overshoot and ringing
characteristics that occur when tuning a system. Review the following
waveforms to determine the kind of characteristics that can be found in an error
signal.

Command

Feedback

Error

Signal

Static
Accuracy
Difference

Command

Feedback

Error

Signal

Following Error
Difference

Command

Feedback

Error

Signal

Actuator
Friction

Zero

Zero

Zero

The error signal from a
square wave should show
the feedback ringing
centered on the zero
reference. A static
accuracy difference in the
error signal can be
corrected with reset.

The error signal from a sine
should be a small amplitude
sine waveform that looks
like a rounded square
waveform.

The square wave shape of
the error signal represents
the phase lag of the
feedback signal.