Abstract
In this work, the problem of controlling (possibly open-loop unstable) continuous free-radical solution polymer reactors with continuous measurements of temperature, level and flows, and discrete-delayed measurements of molecular weight (MW) is addressed. The point of departure is a previous control scheme with linear- decentralized PI volume and temperature components, and a material balance conversion component. Here, the problem of designing and incorporating a MW component driven by discrete-delayed MW measurements is considered within a constructive framework. The result is a four-input four-output control scheme that: (i) has linear decentralized PI- type components with reduced model dependency, and (ii) recovers the behavior of a controller driven by continuous measurements. The proposed approach is tested with a representative example through simulations.
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