process_unit - Process Unit Control System Design 1. 2. 3....

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Process Unit Control System Design 1. Introduction 2. Influence of process design 3. Control degrees of freedom 4. Selection of control system variables 5. Process safety
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Introduction Control system requirements » Safe operation » Satisfy environmental regulations » Stable plant operation » Satisfy specifications on product quality and production rate » Economic plant operation Control system design » Select controlled, manipulated and measured variables » Specify control structure and controller type » Select controller tuning parameters
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Multivariable Control Strategies Multivariable processes » Multiple input and output variables » Requires multivariable control strategy Multiloop (decentralized) control » Manipulated inputs and controlled outputs are paired together » A controller is designed for each input/output pair » Simple to design and often provides satisfactory performance Multivariable control » Manipulated inputs and controlled outputs are not explicitly paired » All the inputs are used simultaneously to control all the outputs » Often necessary for processes with slow dynamics, strong variable interactions, and/or variable constraints
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process_unit - Process Unit Control System Design 1. 2. 3....

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