MTS Systems FlexTest SE Service Information

Model 493.02 Controller Service
About Tuning
Tuning
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About Tuning
When you tune, you are setting the stability and response of the servo
control loop. Proper tuning improves the performance of the test
system.
Inaccurate tuning increases the error and phase lag between the
program command and the sensor feedback. Large error reduces
control accuracy and repeatability, and keeps the full program
command from being applied to the specimen.
Compensating for
specimen changes
Optimal system operation may require a level of detuning to
compensate for specimen changes during a test.
• A highly tuned system provides the greatest level of response, but
this places the system near the point of oscillation or instability.
• As a specimen changes characteristics during testing, the response
of the system also changes. This can cause unstable operation.
• You may need to retune the system response when the
characteristics of the specimen change during a test.
• For the greatest control accuracy, use a compensator.
Program Command
Feedback (higher Proportional gain)
Feedback (lower Proportional gain)
Time Lag
(phase shift)
Error
Proper tuning reduces
error and phase lag.

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English