On Certain Aspects of Linear Retarded Multi-variable Feedback Control Systems

Abstract

A simple analytical method for the stability analysis and design of a multiple-delay multivariable plant based on Dual-Locus technique has been presented. The dual-phase computation in the frequency domain ascertains the generalized phase-margin (PM) and gain-margin (GM) conditions for critical stability. Quite useful results in system design, generalization of stability and extension of stability limits are obtained. A number of stability curves are drawn for the ready reference of control engineers. Examples have been taken to elucidate the procedure. Close agreement exists between the available and predicted results.

Indexing Terms:

• Retarded Systems
• Dual-Phase Technique
• Stability
• Multi-variable Systems

Additional information

Notes on contributors

S. Agarwal

AGARWAL, S: Obtained BTech in Electrical Engg. from Regional 'Institute of Technology, Jamshedpur in 1966. Since then he has been in the faculty of Electrical Engg., RIT, Jamshedpur as a Lecturer. At present, he is doing MTech in Power Sytems in the same faculty. He has co-authored a research paper in National Systems Conference. His main field of interest is Control Systems.

S. Dasgupta

DASGUPTA, S (Dr): Dr. Das Gupta received BEE from Jadavpur University, Calcutta in 1951, MS from State University of Iowa (USA) in 1957. He taught at University of Wisconsin, Indiana Institute of Technology in USA and Bengal Engineering College, Howrah before joining Jadavpur University. He was invited as Visitor at Cambridge University where in the Clare Hall he is a visiting fellow. He is Professor with the Deptt. of Electrical Engineering for more than 12 years. His main, areas of interest are computer, control and operations research. He is the author of the book, Control Systems Theory.