Posts Tagged ‘PID control’

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 [...]

Lambda Control-Loop Tuning Essentials with James Beall

Posted in Control Strategies, Education, Event on Tuesday, January 7th, 2014. No comments yet
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Chris Womack here again with another guest post. Having trouble with an oscillating integrating process? Have too much variability in a self-regulated process? Need a refresher about the essentials of Lambda (λ) tuning? Then check out James Beall‘s workshop at the Jan. 21–23 Texas A&M University 2014 Instrumentation Symposium. James was kind enough to give [...]

Applying Lambda Tuning to Six Common Control Challenges

Posted in Process Optimization, Variability Management on Monday, November 4th, 2013. 2 comments so far
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Last year, some controversy broke out in the process automation and control community about the use of Lambda tuning for proportional-integral-derivative (PID)-based control. In a post, Lambda Tuning-Yeah or Neah?, we offered a differing view to a Control magazine article, The Case Against Lambda Tuning. Emerson’s Mark Coughran has written an excellent whitepaper that is [...]