A multi-threaded communication architecture for networked control systems

Raazi Muhammad Khaliq-ur-Rahman. Muhammad B. Kadri Syed

Abstract


Advancement in communication technology has paved the way for geographically dislocating controllers from the plants they are controlling. Establishing a secure and reliable communication is an essential component to achieve robust control performance. Myriad network control schemes have been proposed but they are incapacitated due to a lack of reliable software paradigm. This highlights the need of a distributed system, which provides platform for smooth communication between a plant and its controller. In this work, we propose CASAPAC, which is a multi-threaded communication architecture designed to ensure reliable and in-order delivery of information between different modules of a network control system. Any control algorithm can be tested and employed over any network using CASAPAC. An adaptive fuzzy controller and a network based gain scheduled PI (Proportional Integral) controller have been tested on different networks using CASAPAC. In both cases, tests were carried out on a real plant of a coupled tank system. CASAPAC was able to handle all the communication efficiently in different scenarios and good control performance was achieved in both cases.

Keywords


Adaptive controls, Client-server systems, Communication architecture, Distributed system, Multithreading, Network delay, Networked control systems, Plant-controller communication

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DOI: http://dx.doi.org/10.24949%2Fnjes.v12i1.403

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ISSN (Print): 2070-9900   ISSN (Online): 2411-6319