SVD decoupling case study (6): manual subsets/fusion of controlled/manipulated variables

Antonio Sala, UPV

Difficulty: *** ,       Relevance: ,      Duration: 22:54

*Enlace a Spanish version

Summary:

This video concludes the 6-video case study on the intuitive interpretation of SVD and singular value decoupling, which began with the theoretical review in the video [dsvdintu1EN], and continued with the examples in videos [dsvdintu2EN] onwards.

Here, we delve into the analysis of the process involving 3 controlled and 4 manipulated variables from the preceding video [dsvdintu5EN]. Specifically, given that only two things were controlled, it is proposed to:

• Neglect the central thermocouple, controlling only two “physical” sensors instead of “virtual” ones (weighted averages of physical sensors).

• Merge the resistance and blower on each side of the furnace as a single actuator before analyzing SVD, etc.

The result is a “reduced” process with 2 inputs and 2 outputs with good conditioning, good RGA, so it could be proposed to control it simply with two conventional PIDs. The solution would likely be good if fused actuators have similar bandwidth; Relating it to the other SVD-based options in the video [dsvdintu5EN] is the objective of the video, so that the SVD can give us clues about this type of possibilities in processes where we do not understand its technology as clearly as in this simple example of thermocouples, resistors, blowers.

Thus, this ends the case study.

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