OPTIMUM PROPORTIONAL-INTEGRAL-DERIVATIVE (PID) CONTROL METHOD FOR ADAPTING A PROCESS FACILITY SYSTEM
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United States of America Patent
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Issued Date -
Apr 26, 2012
app pub date -
Aug 10, 2011
filing date -
Oct 22, 2010
priority date (Note) -
Abandoned
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Abstract
An optimum PID control method for adapting a process facility system is provided. The process facility system includes a primary supply apparatus, a final control element, process facility, a PID controller, and a PID optimization module. When the PID optimization module identifies the primary supply apparatus is switched from an operating status to a shut-down status, the PID optimization module stores a control parameter value of the final control element that is present at the time when the shut down is made in a parameter value memory. Afterwards, when the PID optimization module detects the primary supply apparatus being switched back to the operating status, the PID optimization module retrieves the control parameter value from the parameter value memory and controls the final control element in such a way to have the final control element returning to a position before the shut down with a resumption parameter value and the control parameter value stored in the parameter value memory, whereby optimum PID control can be realized for the process facility in a non-continuous (batch) process.
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