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Reshaping process control: A corporate prerogative

10.01.2011  |  Kern, A.G.,  Tesoro Corp., Los Angeles, California


Prior to the 1980s, process control was in the dark ages. Our main “technology” was the single-loop controller, despite that it operated obliviously to the many interactions and non-first order responses that characterize most processes. Due to cumbersome capabilities, usually involving hardware and wires, if not tubing and pneumatics, any enhancement, such as feedforward, override or adaptive gain, was undertaken only for the most demanding or profitable loops.

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