MTS Series 793 User Manual
Page 254
Warning:
Changes in compensation values made with hydraulic pressure on can result in unexpected
actuator movement.
A moving actuator can injure anyone in its path.
Always clear the actuator area before changing compensation values.
2. Set initial AHC values.
a) Set Train Convergence Rate and Track Convergence Rate to zero.
b) Set Adaptation State to Hold, and click Reset.
c) Select the harmonic frequencies you wish to cancel by selecting the appropriate boxes in the Harmonics
control.
d) If desired, set the Model Filter Count. When you select a new value, you must retrain the system before
the new value takes effect.
3. Set up the scope to monitor command and feedback.
4. Set up and turn on limits to protect yourself and your equipment.
5. Install a dummy specimen.
6. Set up a random noise program.
a)
In the Station Manager window navigation pane, click
.
b) In the Function Generator panel:
•
Select the desired Channel.
•
Select the Control Mode in which AHC compensation is to be tuned.
•
For Command Type, select Random.
•
For Target Setpoint, set a value appropriate for your specimen.
•
For RMS Amplitude (±), set a value appropriate for the test using the AHC compensator.
•
For Frequency Min/Max, set values appropriate for the test using the AHC compensator.
•
For Wave Shape, select the desired Random function with the correct spectral pre-emphasis function.
•
In the Compensator list, select AHC Training.
7. Train the model.
a) Start the Function Generator.
b) Observe Command, AHC Estimated Fdbk, and other signals as desired on the scope.
254 MTS Series 793 Control Software
Station Setup