Lee, Y.
Implement a constrained optimal control in a conventional level controller - Part 2
Novel tuning method enables a conventional PI controller to explicitly handle the three important operational constraints of a liquid level loop in an optimal manner as well as copes with a broad range of level control from tight to averaging control
Consider the generalized IMC-PID method for PID controller tuning of time-delay processes
This simple analytical method provides PID parameters to give a desired closed-loop response while available for any class of time-delay processes
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Long Son Petrochemicals Complex
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