An Optimized Triggering Algorithm for Event-Triggered Control of Networked Control Systems

Sunil Kumar Mishra, Amitkumar V. Jha, Vijay Kumar Verma, Bhargav Appasani, Almoataz Y. Abdelaziz and Nicu Bizon
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Sunil Kumar Mishra: School of Electrical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, India
Amitkumar V. Jha: School of Electrical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, India
Vijay Kumar Verma: Control and Digital Electronics Group, U R Rao (ISRO) Satellite Centre Department of Space, Government of India, Bengaluru 560017, India
Bhargav Appasani: School of Electrical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, India
Almoataz Y. Abdelaziz: Faculty of Engineering and Technology, Future University in Egypt, 90th St, First New Cairo, Cairo Governorate, Cairo 11835, Egypt
Nicu Bizon: Faculty of Electronics, Communication and Computers, University of Pitesti, 110040 Pitesti, Romania

Mathematics, 2021, vol. 9, issue 11, 1-22

Abstract: This paper presents an optimized algorithm for event-triggered control (ETC) of networked control systems (NCS). Initially, the traditional backstepping controller is designed for a generalized nonlinear plant in strict-feedback form that is subsequently extended to the ETC. In the NCS, the controller and the plant communicate with each other using a communication network. In order to minimize the bandwidth required, the number of samples to be sent over the communication channel should be reduced. This can be achieved using the non-uniform sampling of data. However, the implementation of non-uniform sampling without a proper event triggering rule might lead the closed-loop system towards instability. Therefore, an optimized event triggering algorithm has been designed such that the system states are always forced to remain in stable trajectory. Additionally, the effect of ETC on the stability of backstepping control has been analyzed using the Lyapunov stability theory. Two case studies on an inverted pendulum system and single-link robot system have been carried out to demonstrate the effectiveness of the proposed ETC in terms of system states, control effort and inter-event execution time.

Keywords: backstepping control; event-triggered control; Lyapunov stability theorem; networked control system; nonlinear system (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
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