bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)

205.767

2008 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2010

Editorial Calendar 2010

Editorial Calendar 2011

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents

 

Best Articles 2009

 

 

 

Vol. 121, Issue 10, October 2010, pp.77-93

 

Bullet

Limitations of Feedback, Feedforward and IMC Controller for a First Order Non-Linear Process with Dead Time

 

 

1 Maruthai Suresh and 2 Ranganathan Rani Hemamalini

1Assistant Professor, Dept of EIE, St. Peterís Engineering College, Chennai, India

2 Professor, Dept of EIE, St. Peterís Engineering College, Chennai, India

E-mail: maruthaihsuresh@gmail.com, ranihema@yahoo.com

 

 

Received: 26 June 2010   /Accepted: 18 October 2010   /Published: 26 October 2010

 

Abstract: A nonlinear process, the heat exchanger whose parameters vary with respect to the process variable, is considered. The time constant and gain of the chosen process vary as a function of temperature. The limitations of the conventional feedback controller tuned using Ziegler-Nichols settings for the chosen process are brought out. The servo and regulatory responses through simulation and experimentation for various magnitudes of set-point changes and load changes at various operating points with the controller tuned only at a chosen nominal operating point are obtained and analyzed. Regulatory responses for output load changes are studied. The efficiency of feedforward controller and the effects of modeling error have been brought out. An IMC based system is presented to understand clearly how variations of system parameters affect the performance of the controller. The present work illustrates the effectiveness of Feedforward and IMC controller.

 

Keywords: Non-linear process, IMC controller, Feedforward control, Feedback control, Dead time

 

Acrobat reader logo Click <here> or title of paper to download the full pages article (2.7 Mb)

 

 

 

 

 


1999 - 2010 Copyright ©, International Frequency Sensor Association (IFSA). All Rights Reserved.


Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - Membership - Submit Press Release - Twitter

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map - Video