Control with excess actuators (2): cascade extra actuator, gradual, double cascade

Antonio Sala, UPV

Difficulty: **** ,       Relevance: PIC,      Duration: 19:40

*Enlace a Spanish version

Materials:    [ TwoActuatorsSummaryENG.pdf]

Summary:

This video continues the discussion on strategies for control structures with 1 controlled and 2 manipulated variables. The discussion was started on video [dosact1EN].

There were two main divisions of strategies to solve the problem: those with only one controller in operation and those where a secondary reference is generated, and there are two active controllers.

The first three minutes of the video review strategies with an active controller: load balancing, split range, and override; These strategies were discussed in detail in the video [dosact1EN], prior to this one.

Continuation of this exposition, here strategies with a secondary reference are explained. The proposed ones are:

These cascade structures work best (ease of tuning) when there is ‘time-scale separation’, whereas the structures in the first video work best when both manipulated variables have comparable bandwidths, similar dynamics.

*Link to my [ whole collection] of videos in English. Link to larger [ Colección completa] in Spanish.

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