Method and a system for operating a controllable...

Details Method and a system for operating a controllable... Method and a system for operating a controllable...

2011-03-29

2011-03-29

Patel, Ramesh B (Department: 2121)

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

C345S441000, C700S052000, C700S067000

Reexamination Certificate

active

07916140

ABSTRACT:
Controlling a multi-variable process involves multi-dimensional representation of the values (Qa-Qh) of the process-variables (a-h) according to individual coordinate axes (Xa-Xh), and response based on historical values for the process-variables accumulated from multiple, earlier processes. An envelope (UL-LL) showing the best operating zone (‘BOZ’) for each process variable based on current values of the other variables is calculated from the accumulated historical values, and alarm conditions in which the current value of a variable lies outside the BOZ is rectified by changing the values (Qa-Qc) of manipulatable variables (a-c). Variable targets are achieved, alarms rectified and value optimisation realised using an inner envelope (UI-LI) derived from a subset of the BOZ-defining set of historical values. Where the alarm rate is low, operation is improved by narrowing the BOZ set to tighten the BOZ envelope (UL-LL) reducing an inner envelope where alarm rate remains acceptable, as a new BOZ.

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