For a comparative assessment of identification algorithms with continuous-time and discrete-time models, the Rao-Garnier test system became a bench mark.

Indian Institute of Technology Kharagpur[17] which conferred on him its Distinguished Alumnus Award in 2019[18] Apart from his work at PSG College of Technology, Coimbatore, India, IIT Kharagpur, he held the following positions: 1975 October - 1976 July, Commonwealth Postdoctoral Research Fellow, Control Systems Centre, University of Manchester Institute of Science and Technology (UMIST), Manchester, England, 1982-1983, 1985, 1991, 2003, 2004, and 2007: Research Fellow of the Alexander von Humboldt Foundation.

Lehrstuhl für Elektrische Steuerung und Regelung, Ruhr-Universität Bochum, Germany ; 2003, 2004 2007 Fraunhofer Institut für Rechnerarchitectkur und Softwaretchnik (Fraunhofer Institute - FIRST), Berlin[19] 2003 Visiting professor Henri Poincaré University, Nancy, France.

More recently at International Conference on Mathematics in Space and other Applied Sciences (ICMSAS-2019), 29–30 November 2019, Netaji Subhash Chandra Bose Memorial PG college,Hamirpur India[22][23] and the Chief Guest at the International Conference on Advances in Applicable Mathematics, (ICAAM-2020) at Bharathiar University Coimbatore, India, 21–22 February 2020.

One of the popular topics in this series is his own justification of the importance of the ancient Hindu concepts of zero and number systems and he shows how these concepts appear to have influenced the mind set of mathematicians to be viewed as the pillars of the world of mathematics.Video on YouTubeVideo on YouTube Over 150 published papers,Books and as CO-Editor [24][25][26][27][28][29][30][31][32][33][34] [35] Rao married Meenakshi (Vedula) in May 1963.