beautypg.com

Signal compensation for servohydraulic systems, Compensator overview – MTS Multipurpose Elite User Manual

Page 133

background image

Note:

Power status applies only to control channels. If a procedure does not contain control channels, the
power status has no effect on the procedure.

Power Required to Run Settings

Description

Item

This setting requires you to run tests with high hydraulic pressure applied
to the station’s Hydraulic Service Manifolds (HSM).

High

This setting requires you to run tests with high or low hydraulic pressure
applied to the station’s HSM.

High or Low

This setting allows you to run tests and observe command sequences
without applying hydraulic pressure to the station’s HSM. The Off selection

Off

is typically used while you are learning the application software or running
test simulations.

This setting allows you to run tests and observe command sequences
without applying hydraulic pressure to the station’s HSM. This setting also
allows you to run with active interlocks.

Off or Interlock

For More Information

Concept
Task

Access Command Settings Tab

(p. 131)

Signal Compensation for Servohydraulic
Systems

Compensator Overview

Compensators compare the command with the corresponding sensor feedback to ensure that the command
is fully applied to the specimen. If the sensor feedback indicates that the specimen is not reaching the
commanded levels, the compensator alters the command until the desired result is achieved.

You must use the MTS Series 793 control software to configure compensators. You use the MTS TestSuite
application software to apply the compensation.

For example, suppose you use the Cycle activity included with MTS TestSuite software to play out a sine
wave at ±10 cm displacement but find that the LVDT feedback achieves only ±9 cm.

In this case, you would configure the Peak-Valley Amplitude Control (PVC) compensator included with the
Series 793 software to boost the command. Once configured, the compensator monitors the feedback

MTS TestSuite | 133

Working with Multipurpose Elite