How to manually tune the control loop, How to manually tune the control loop 70 – MTS Series 793 User Manual
Page 70
MTS Series 793 Tuning and Calibration
How to Manually Tune the Control Loop
Tuning Procedures
70
How to Manually Tune the Control Loop
Tasks related
to manual tuning
The following are tasks that should be completed before you tune. It is not
necessary to perform every task each time you tune. The condition of your
system dictates which of the following tasks you must perform.
For example, a new system or a system freshly recalibrated requires all of the
following to be completed. If you are performing periodic or fine-tuning, review
the following and determine which tasks you need to complete.
•
Balance the servovalve. The electrical valve balance adjustment
compensates for minor mechanical imbalance—it is an intermediate
adjustment. See
“How to Balance the Servovalve”
•
Calibrate each sensor used for a control mode or data acquisition. Perform
the appropriate calibration procedure.
•
If your sensor calibration schedule does not require calibration at this time,
perform a shunt calibration check to determine if your DC sensor/DC
conditioner is within tolerance. See
•
If you have a three-stage (Series 256 or 257) servovalve, tune the inner loop
(gain and rate) before tuning the outer loop. The rules for inner loop tuning
are similar to those of the outer loop. See
•
If your Controller is equipped with the optional auto-tuning feature, it is best
to run auto-tuning first. Auto-tuning establishes reasonable tuning levels
that will be adequate for most control modes. If the results from auto-tuning
are not satisfactory, you should manually tune each control mode. See