Time-varying MFA Controller
The Time-Varying MFA controller is used to control a
process with large time constant and/or delay variations.
For instance, a temperature control loop usually has
a shorter time constant when it heats up and a much
longer time constant when it cools down because adding
heat to the process is much faster than taking it away.
Also, a line speed or flow rate change can cause the
process delay time to vary significantly.
Time-varying MFA Controller Configuration
As shown in the following graph, the Time-varying MFA
controller can be configured with an estimated minimum
and maximum process time constant plus delay time. The
controller is able to deal with large time constant
and/or delay time changes without having to re-tune
Time-varying MFA controller configuration menu