Abstract #300664

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JSM 2003 Abstract #300664
Activity Number: 98
Type: Contributed
Date/Time: Monday, August 4, 2003 : 9:00 AM to 10:50 AM
Sponsor: Section on Quality & Productivity
Abstract - #300664
Title: Use of Hotelling's T-Square to Improve Internal Model Control
Author(s): Srinivasan Ambatipati*+ and Rebekah A. Griffith and John Griffith
Companies: Student and McNeese State University and McNeese State University
Address: P0 Box 93130, Lake Charles, LA, 70609,
Keywords: Hotelling's T-Square ; internal model control
Abstract:

Internal model control is applied to a process operating under two regimes that may each be considered "normal" operation. Model parameters--gain, time constant, and dead time--are determined for the process for each operating regime. Hotelling's T-square is used to monitor the process, and T-square parameters are generated for each operating regime. When the process shifts from one regime to another, the shift is detected by a signaling T-square, and the control system is directed to shift control model parameters to those of the new regime. The selection of a model to fit the process conditions results in tighter overall control.

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