July 2009

Columns

HP Control: APC designs for minimum maintenance—Part 2

My last month's editorial proposed that since our advanced process control (APC) applications are by and large under-maintained, these applications should be designed in the simplest possible way. The..

Friedman, Y. Z., Petrocontrol

My last month's editorial proposed that since our advanced process control (APC) applications are by and large under-maintained, these applications should be designed in the simplest possible way. The design rule discussed was: Do not clutter the control matrix. Associate each control variable, CV, preferably with one, hopefully no more than two, manipulated variables (MVs). That was accompanied by a distillation column example (Fig. 1), which this editorial will continue to use proposing additional rules.  Fig. 1    A distillation column candidate for APC. Design rule 2. A

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