Tag Archive: “adaptive tuning”

Jul
22

Adaptive Tuning – Example Application

Adaptive Tuning Example

It is often possible to spot where adaptive control is needed by observing trends of control loops that show the control parameter and valve position during a time period when the process conditions change over their normal span of operation. If the control performance varies with changes in operating conditions, then adaptive tuning may be …

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Jul
15

Adaptive Tuning – Field Experience

Reduction in Process Variability

The adaptive tuning capability included in DeltaV was field tested at four customer sites during the initial stages of product development. This field trail was conducted over a six month period and include over 1000 control loops. One of the field trail sites was at Lubrizol, Deer Park, TX where this adaptive control capability was …

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Jul
08

Adaptive Tuning – Models Identified

Viewing Identified Models

The basis of adaptive tuning is the identification of the process step response based on operator changes in the loop operation. For example, when a control loop is in Automatic mode, changes made in the setpoint can trigger process model identification. If the loop mode has been changed to Manual, then changes by the operator …

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Jul
01

Adaptive Tuning – Model Switching

Adaptive PID Controller With Model Switching and Parameter Interpolation

During the development of the DeltaV adaptive tuning capability, we researched and evaluated many of the most common techniques for implementing adaptive tuning. Also, as part of this research we came across a number of technical articles on a relative new adaptive tuning technique known as model switching. This technique depends on the evaluation of …

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Sep
03

Advanced Control Foundation – ISA Web Site

Advanced Control Foundation

Last week Mark Nixon, Willy Wojsznis and I completed the final type set review of Advanced Control Foundation – Tools, Techniques, and Applications. It is always a good feeling to reach this point when writing a book. As I mentioned in an earlier blog, Advanced Control Foundation – Tools, Techniques and Applications will be available …

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Aug
13

Emerson Exchange – Meet the Expert Session

This year Emerson Exchange will be held October 8-12, 2012 – Hilton Anaheim in Anaheim, California.  A number of meet the expert sessions are scheduled for the last day of the conference, Friday, October 12th . Willy Worjsznis and I will host one meet the expert session in which we will give an overview of …

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Aug
06

Advanced Control Foundation – Coming Soon

Advanced Control Foundation

Many of the advanced control products available in the DeltaV control system can be traced to an advanced control research and development program established within Emerson Process Management in the early 1990s. The ISA book Advanced Control Unleashed – Plant Performance Management for Optimum Benefit, published in 2003, included examples based on advanced control software …

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