Posts Tagged ‘PID control’

PID Control in 3-Phase Oil and Gas Separation

Posted in Oil & Gas on Tuesday, January 27th, 2015. No comments yet
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The PID controller entry in Wikipedia highlights the beginning of proportional+integral+derivative control going all the way back to the 19th century: PID controllers date to 1890s governor design.[2][3] PID controllers were subsequently developed in automatic ship steering. One of the earliest examples of a PID-type controller was developed by Elmer Sperry in 1911,[4] while the […]

Methodology for Solving Control Loop Problems

Posted in Control Strategies, Oil & Gas, Process Optimization, Variability Management on Friday, October 31st, 2014. One comment so far
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This time of year, after our big Emerson Exchange conference, I like to go back and see what sessions I missed to be able to be able to recap for you. I caught up with Emerson’s Mark Coughran, whom you may recall from many control performance-related posts. He co-presented a paper, Solve Control Loop Problems […]

Regulatory and Model Predictive Control Difference?

Posted in Process Optimization on Friday, September 12th, 2014. No comments yet
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Over in LinkedIn’s Process Control group, a question was asked: What is the difference between regulatory and model predictive control. Is it possible that MPC work as stand alone without regulatory control? Emerson’s Chowyang Neo offered: Regulatory Control generally refers to good old PID loop control. Gaps between the SP and PV known as errors […]

Setpoint Lead-Lag Question and Answer

Posted in Education, Process Optimization on Monday, March 24th, 2014. No comments yet
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I wanted to share this question and answer on setpoint lead-lag, from the Mentoring Engineers discussion group in the Emerson Exchange 365 community. The question: …one of the options you recommend for eliminating overshoot at setpoint changes is using a setpoint lead-lag setup. I cannot visualize the concept in my mind. In a Two Degrees […]

Wireless Measurements in Control Applications

Posted in Control Strategies, Wireless on Wednesday, January 8th, 2014. No comments yet
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As wireless technology continues to be used in process manufacturing facilities, those used in control applications are increasing. At the ISA Automation Week conference, Emerson’s Terry Blevins, Mark Nixon, and Marty Zielinski authored the paper, Using Wireless Measurements in Control Applications. Terry and Marty presented it for Automation Week attendees. They discussed the impact of […]