University of Botswana Prpfessor Yanev’s Research Generates Global Interest

A journal article titled Design and Analysis of a Robust Accurate Speed Control System by Applying a Digital Compensator, published by Associate Professor in Control and Instrumentation Engineering in the Department Electrical Engineering in 2016 continues to draw huge global interest.

Professor Kamen Yanev published his article in a high profile USA journal of Automatic Control and System Engineering in 2016, a journal with an ISI Impact Factor of 1.632.

The publication earned Professor Yanev Gold Membership of the Academic Community of International Congress for Global Science and Technology (ICGST), USA in 2016. Since then, the number of researchers visiting the Gold Member page for the article has been rising steadily, growing the University of Botswana’s international profile in the process.

The research article presents a strategy for analysis and design of a digital robust control system for accurate speed control of a DC motor. The case presented in the research demonstrates a control system that regulates the speed of an electrical DC motor.

Speaking at a public seminar on the subject at UB Conference Centre on March 30, 2017, Professor Yanev said there were three new suggested methods in the article: detection of the motor’s speed, determining control system stability and robust control design. “The methods are recognised internationally as innovations, contributing to a control theory and beneficial for the practical implementation,” said Professor Yanev.

The research paper is a culmination of continuing research which began in 2006. So far, the research has resulted in 24 publications, of which 16 are international journal publications, while the rest are international conference papers and presentations. The research has been published in the USA, Italy, Germany, Canada, Botswana and India.

“One of the contributions of this research is the innovative solution ofthe incorporation of a DC motor into a Wheatstone bridge that operates as a Wheatstone Speed-to-Voltage Converter (WSVC),” Professor Yanev said during the lecture.

He also explained that another contribution was in the advancement of the D-Partitioning method as a stability analysis tool in the application for digital robust nonlinear control systems. In this instance, Professor Yanev expanded the initial ideas of Neimark to a Method of Advanced D-Partitioning as a stability analysis tool.

“The principle of the Advanced D-Partitioning analysis is recognized internationally as an innovation contributing to control theory and is useful for application in real life control systems. It contributes to knowledge, since it is the only method of stability analysis that illustrates graphically the images of regions of stability and instability and can be applied to linear, digital or non-linear control systems,” added Professor Yanev.

He also said that the third major contribution of the research was the suggested strategy for the design of an optimal robust controller. Professor Yanev said the system could become robust, or independent of parameter variations, if a digital robust controller, based on microcontrollers was implemented. Professor Yanev also suggests a number of unique successive steps for the design of optimal digital robust controller.

He observed that the effect and contribution of his research was enormous since the application of DC motors was still irreplaceable for elevators, cranes, air compressors, vacuum cleaners, sewing machines, drills, remote gates operation and electric trains, where constant speed at high and a variable torque was essential.

Source: University of Botswana online

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