Search results for: Continuous Control

Jan
11

Wireless Control Foundation – Part 2, Continuous Control

In this Part 2 of the Wireless Control Foundation short course given at Emerson Exchange 2015 , Terry Blevins addresses continuous control using wireless transmitters and control using wireless throttling valves. If you have an interest in learning more about wireless control then you can view a video of this presentation using the link below.

Sep
29

Batch vs. Continuous Control and Optimization – Part 4

Batch and fed-batch reactors are designed so that the product concentration is always increasing in the reaction phase of the cycle whereas continuous reactors are designed to hold a constant product concentration. These fundamental differences have enormous implications in terms of composition control. Conventional control of product concentration in a batch and fed-batch reactor is …

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Sep
23

Batch vs. Continuous Control and Optimization – Part 3

Reactors are the pivotal unit operation that sets plant capacity and efficiency besides product quality. Reactors provide good examples of the common and distinctive opportunities for the PID control of batch, fed-batch, and continuous unit operations. Here we examine pressure, temperature, and endpoint control. The pressure control of batch, fed-batch, and continuous reactors may have …

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Sep
16

Batch vs. Continuous Control and Optimization – Part 2

Batch and continuous temperature loops can have vastly different responses. Fortunately, temperature loops have a characteristic early in the response that enables a fast identification of the process dynamics. The resulting models can be used for process control improvement, tuning, and rapid deployment of models for plantwide simulations. Temperature is the most important common measurement …

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Sep
08

Batch vs. Continuous Control and Optimization – Part 1

Feedback control systems play an important role in batch and continuous unit operations. What are the similarities and differences in the process response, tuning, control strategies, and advanced process control opportunities? What can continuous control specialists learn from batch control experts and vice versa? Is it possible there are some fundamental principles unifying our solutions …

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Jun
27

Automatic Control: Future Challenges, Solutions, and Systems

I had the pleasure of attending the Second International Conference on Event-Based Control, Communication and Signal Processing EBCCSP2016, Krakow, Poland, June 13-15, 2016. On the first day of the conference I gave an industrial keynote presentation on Automatic Control: Future Challenges, Solutions, and Systems. Also, Willy Wojsznis attended the conference and presented a paper. Below …

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Aug
31

Process Control Using Wireless Sensors and Actuators

Over the last 10 years I have worked with a number of technologists from the process industry on various aspects of control using wireless field devices. Much of this work is summarized in the book Wireless Control Foundation – Continuous and Discrete Control for the Process Industry. Recently Mark Nixon (Emerson) and Willy Wojsznis (Emerson), …

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Feb
16

Control Classes – Dubai

In late November, 2014 I traveled to Dubai to teach the Control Loop Foundation class. This class is based on the book Control Loop Foundation – Batch and Continuous Processes and is a standard class offered by Emerson’s education department. In this class the students used the book’s web site to perform the workshops that …

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May
05

Control Loop Foundation Reprint

A book goes through many reviews and edits before it can be published. Still, it is very difficult for the authors and reviewers to catch all the typo’s in the original text and those that are introduced during the type setting process (formatting for publication). ISA recently notified me that the book that Mark Nixon …

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Nov
11

Application of On-line Data Analytics to a Continuous Process Polybutene Unit

Lubrizol Corporation has installed at the Deer Park, TX plant a field trail version of Emerson’s Continuous Data Analytics capability. Over the last year Qiwei Li, production engineer, and Robert Wojewodka, Technology Manager and Statistician, have developed PCA/PLS models to predict quality parameter and detect faults for the Polybutene and refrigerant compressor units at the …

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