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Control of Multiple-Input, Multiple- Output (MIMO) Processes

Control of Multiple- Input, Multiple- Output (MIMO) Processes Chapter 18. Process Interactions and Control Loop Interactions Pairing of Controlled and Manipulated Variables Singular Value Analysis Tuning of Multiloop PID Control Systems Decoupling and Multivariable Control Strategies Strategies for Reducing Control Loop Interactions 1. Control of Multivariable Processes In practical Control problems there typically are a number of process variables which must be controlled Chapter 18. and a number which can be manipulated. Example: product quality and throughput must usually be controlled. Several simple physical examples are shown in Fig. Note the "process interactions" between controlled and manipulated variables. 2. Chapter 18. SEE FIGURE in text.

Block Diagram Analysis For the multiloop control configuration, the transfer function between a controlled and a manipulated variable depends on whether the other feedback control loops are open or closed. Example: 2 x 2 system, 1-1/2 -2 pairing From block diagram algebra we can show Note that the last expression contains GC2. 1 11 1 P Y(s) G(s ...

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Dynamic Behavior and Stability of Closed-Loop Control Systems

sites.chemengr.ucsb.edu

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