Category Archive: Simulation

Oct
22

Continuous Data Analytics – Impact of Transport Delay

When developing a PLS models for quality parameter prediction, the deviation of measurement values from their mean must be shifted in time to account for the time required for a change in the input to impact the quality parameter. Similarly, these delays should be taken into account in the processing of the deviation values used …

Continue reading »

Oct
15

Continuous Data Analytics – Impact of Grade Change

The process operating points of a continuous process can shift with changes in the product grade that is manufactured. One example of this is a continuous reactor in which the target for output composition changes with product grades. To change the output composition, it is often necessary to change the operating point of one or …

Continue reading »

Oct
08

Continuous Data Analytics – Quality Parameter Prediction

The prediction of quality parameters using Partial Least Squares (PLS) models is often the preferred technique when dealing with collinear data where multiple process input changes impact similar process output measurements. Predictions based on this linear technique can be used to extrapolate outside the data range used in model development. Process interactions may be accounted …

Continue reading »

Oct
01

Continuous Data Analytics – On-line Use

One of the key objectives of a process control system is to maintain product quality parameters within specification. On-line analyzers that automatically provide measurements of material properties to the control system may be too expensive, may have proven to be unreliable, or simply may not be available because of the complexity of the sampling system …

Continue reading »

Sep
17

Control Loop Foundation Class – Nov 5-9

I worked closely with Emerson’s education department to establish the class Control Loop Foundation (9025). This 4 ½ day class is intended primarily for people who are new to the process industry and process control. Approximately 30% of the class is dedicated to workshops in which the students get hands on experience working with the …

Continue reading »

Sep
10

Advanced Control Foundation – Book’s Web Site

A workshop is provided at the end of each chapter of Advanced Control Foundation – Tools, Techniques, and Applications that explores the technology. One of the unique features of the book is that the reader may view the workshop solution by going to the web site (http://www.advancedcontrolfoundation.com. ) that accompanies the book. All you need …

Continue reading »

Sep
03

Advanced Control Foundation – ISA Web Site

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 …

Continue reading »

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 …

Continue reading »

Aug
06

Advanced Control Foundation – Coming Soon

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 …

Continue reading »

Jul
30

Boot Camp for New Employees

Courses required for an engineering degree are designed to provide the student with a sound technical foundation for work in industry. However, in most cases these courses do not address the terminology and common practices that an engineer must know to design, implement, checkout and commission a process control system. Universities can help bridge this …

Continue reading »

Older posts «

» Newer posts