PROFESSOR YANEV RESEARCH GENERATES
GLOBAL INTEREST
A journal article titled Design and Analysis of a Robust Accurate
Control System by Applying a Digital Compensator and published by a Control and
Instrumentation Engineering Associate Professor from the Department Electrical
Engineering at the University of Botswana (UB) in 2016 continues to elicit huge
global interest.
Professor Kamen Yanev published his article in a high profile USA journal of Automatic Control
and System Engineering in 2016 with an ISI Impact Factor of 1.632.
As a result of publication, Professor Yanev was elected a Gold Member 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. In the process, this will have a positive impact on the
University of Botswana’s international profile.
The research article presents a strategy for analysis and design of a
digital robust control system for accurate
speed control of a DC motor. Thus, the case presented in
the research demonstrates a control system that regulates the speed of an
electrical DC motor.
Speaking at a public seminar 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 control theory and beneficial for the practical
implementation,” said Professor Yanev.
The research paper is a culmination of a continuing research that started
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 of the incorporation of a DC motor into a Wheatstone
bridge that operates as a Wheatstone Speed-to-Voltage Converter (WSVC),” said Professor Yanev.
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 recognised 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 the third major
contribution of the research was the suggested strategy for 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 design of
optimal digital robust controller.
He observed that the effect and contribution of his research was enormous
given 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.
Prosecutors stated: "No sane person of her
stature can exhibit such behaviour. [We] deeply believe that the suspect
may be a person of unsound mind. [She should be] placed under treatment
as per provisions of mental treatment act."
