TABLE OF CONTENTS This exercise will give some practical experience in the closed loop control strategy necessary if a long deadtime is part of the process to be controlled. Figure Ex. 14.1 shows the block diagram of a control loop with added process simulation as a means of overcoming process deadtime.
Within this exercise, we have a conflict of terminology. As we have no physical industrial plant to control, we have to simulate the behavior of such an industrial plant. If one of the tools of controlling an industrial plant requires a process simulation, we would not know what simulation is meant if we do not make a clear distinction between the process simulation acting as a stand-in on behalf of the real process, and the simulation acting as a tool of control.
Therefore, in the description of this exercise, the term simulation is never used if referring to the real process; the terms for the real industrial process will be used here instead. In this exercise, the term simulation is used only for a process simulation which exists in addition to the industrial process and would exist in a real industrial plant for control purposes as well.
Select the training application Deadtime compensation in single loop control. The tuning constants for the process simulation are in detail display F5. They are K-SIM, BIAS-SIM, TC1, TC2 and DELAY. The values have been initialized to the correct values required to match the...
