PID Controller Performance Evaluation in Distributed Mobile Telemedicine Nodes within Nigeria

Aye Taiwo Ajiboye; Tunji Samuel Ibiyemi

Aye Taiwo Ajiboye Department of Computer Engineering, University of Ilorin, Ilorin
Tunji Samuel Ibiyemi Department of Electrical and Electronics Engineering, University of Ilorin, Ilorin

Keywords: Mobile telemedicine node, NigComSat-1R, PID controller, time delay, performance indices

Abstract

The availability, quality and cost of healthcare delivery in developing countries in general and Nigeria in particular could be improved upon if information technology is appropriately introduced into the health care delivery scheme and well managed. Therefore, introduction of telemedicine into developing nation’s healthcare delivery scheme could be a solution to a number of challenges facing the scheme including acute shortage of medical personnel. The aim of this work is to have a system that will enable the dishes at the mobile nodes at the remote location to transceive correct medical information to/from the base station via Nigcomsat-1R. To achieve this aim there is the need for precise tracking of the satellite by the dishes located at each mobile node. Since these nodes are distributed all over Nigeria, the time delay between the nodes and the base station is enormous, because of Nigeria large land mass of about 923,677 sq km. The effectiveness of PID controller used in this work is largely determined by the amount of delay between remote nodes and the base station as the performance of PID controller degrades with increase in time delay. The minimum and maximum time delay between University of Ilorin and the telemedicine nodes at any location within Nigeria was determined. The performance of both the uncontrolled and the controlled systems was determined and evaluated based on time domain performance indices. The analysis of the simulation results confirmed remarkable improvement in the performance of the controlled system over the uncontrolled system which shows the effectiveness of PID controller.

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