MTS Series 793 Controller - Manual (Page 40)

MTS Series 793 Controller Overview
Software Options Available with Key Codes
Controller Software 40
Model 793.14
Fatigue Monitoring
A specialized analysis application that allows you to monitor fatigue data that has
been recorded in real time. This application works with the MultiPurpose
TestWare application, using the Fatigue process.
Model 793.15
Degree of Freedom
Control (DOF)
DOF control (available with Series 793 Software version 4.0 and later) provides
a coordinate system in which actuators act in groups to produce movement in six
degrees of freedom (vertical, longitudinal, lateral, roll, pitch, yaw). The feedback
and command are converted from actuator coordinates at the start and finish of
the control loop. Specifically, the raw actuator feedback signals are converted to
DOF coordinates. The controller then closes the loop using these DOF
coordinates. The DOF controller outputs are then combined to provide individual
actuator valve commands.
Model 793.16
Three Variable Control
(TVC)
TVC control (available with Series 793 Software version 4.0 and later) provides
simultaneous control of displacement, velocity, and acceleration variables. It
combines the command and feedback signals of all three control variables to
provide the needed system performance, emphasizing displacement at low
frequencies, velocity at middle frequencies, and acceleration at high frequencies.
This tailors the frequency stability characteristics of the wave generator to
achieve the best performance across the spectrum.
Model 793.21 Cascade
Control
The Model 793.21 Cascade control mode is typically used for testing that
requires a high degree of stability under dynamic conditions.
This control mode uses two control loops. The output of the outer control loop is
used as the input to the inner control loop, as if it were the final control element.
Model 793.23 MPT
Variables
The Model 793.23 MPT Variables feature provides test designers with the
capability to define test parameter variables. With this feature, test designers can
create tests in which the operator enters test parameter variables in just one place.
When this is done, all related variables in the test are updated automatically
without the operator having to open each associated process individually. This
can significantly reduce test design and setup time and reduce setup errors.
This feature includes an MPT Calculation process that allows test designers to
add mathematical operators to variable parameters.
Another process, Set Controller Value, allows you to set values for the
calculation parameter and calculation variable values defined in the station
configuration. When the process is triggered, the values set in this process
override their associated values inc the station configuration.