MTS Criterion Series 40 - Manual (Page 49)

Description Item
Feedback 1
Controlling Element 2
Controlled Element 3
Command 4
The controlling element is the computer, the MTS Insight controller, and the MTS TW application. The
controlling element produces a control signal (Command) that represents the direction and amount of
extension you desire to apply to the crosshead. The controlled element comprises the motor, the crosshead,
and the specimen itself. The controlled element applies the required forces (Command) to the specimen
and the specimen reacts to it. The Feedback is the response from one of various sensors that indicates
how the controlled element has responded.
Closed Loop Control Step-by-Step
The following closed-loop diagram illustrates how the system operates when you use the Crosshead
Controls panel in the TW Express application to extend the crosshead assembly.
Basic Closed-Loop Control in MTS Criterion Systems
1. You input a crosshead up command by clicking the Up arrow in the Crosshead Controls panel in the
TWX application.
2. The MTS Insight controller generates a signal that represents the direction and amount of extension
the crosshead needs to travel to accommodate your command.
MTS Criterion ™ Series 40 | 49
Key Concepts