bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)



25 Top Downloaded Articles

Editorial Calendar 2007

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers Journal's cover


Sensors & Transducers Journal 2006

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





Vol. 79, Issue 5, May 2007, pp. 1164-1172




Model Based Evaluation of a Controller Using Flow Sensor for Conductivity Process



P. Madhavasarma, S. Sundaram

Department of Electronics& Instrumentation Engineering

SASTRA University, Thanjavur613402 Tamilnadu, India

Tel.: +91(04362)264101, extn: 262, fax: +91(04362)264120

E-mail: Spms1975@yahoo.co.in, ssundar@sastra.edu



Received: 25 April 2007   /Accepted: 11 May 2007   /Published: 31 May 2007


Abstract: A flow system with varying dead time is experimentally studied and a model generated using step response. Initially an Open loop test is conducted for identifying the process parameters for which the process system used is a helical coil with downstream lag. The process variable namely, conductivity was monitored using Honeywell conductivity sensor. Based on the dynamic response, the Process is represented by a Second order Plus Dead Time (SOPDT) model.  PID controller and state feed back controller were studied using the SOPDT model. The data obtained are analyzed and compared with simulated values using MATLAB. The established SOPDT model is fitted to the experimental values with an error of less than three percent. Based on overshoot, rise time, settling time, the present study concludes that the state feed back controller is best suited for this flow process.


Keywords: Conductivity, Identification, Helical coil, Pole placement, SOPDT


Acrobat reader logo Click <here> or title of paper to download the full pages article (569 Kb)





1999 - 2007 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - e-Shop - Membership

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