MTS 85X Damper User Manual
Page 42
Damper System Operation
42
Perform a Practice Test
793 Controller Operation Overview
•
Adjust the Manual Command slider to position the actuator while
installing the specimen.
•
Switch to the Force control mode.
F.
Adjust the P Gain and D Gain tuning controls.
•
Start the Function Generator by clicking the Program Run control
and observe the resulting waveform on the Scope.
•
From the Display menu, select Station Setup.
•
From the tree view, expand Channels, then select Channel 1.
•
Click the Tuning icon
to display the tuning adjustment controls.
•
Increase the P Gain control until you see a little overshoot and a little
ringing on the Scope.
•
Slowly increase the D Gain control to reduce the overshoot and
ringing. Keep in mind that small adjustments of D can have large
effects on your system.
•
Repeat P Gain and D Gain adjustments until you achieve an optimum
waveform
5. Install the test specimen.
A.
Select the Displacement control mode for test specimen installation.
B.
Install the test specimen.
•
Turn on the Manual Command control on the Station Controls panel.
Ringing
Overshoot
The middle waveform is
the optimum waveform. In
some cases the
waveform will have no
overshoot or ringing.
Gain (P)
Rate (D)
Low
High
High