Modelling of Networked Control Systems

Benítez-Pérez, Héctor; Ortega-Arjona, Jorge L.; Méndez-Monroy, Paul E.; Rubio-Acosta, Ernesto; Esquivel-Flores, Oscar A.

doi:10.1007/978-3-319-97044-8_2

Cited by 1 publication

(1 citation statement)

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“…e data scheduling-based mechanisms consider NCSs to be control systems and try to optimize performances of the overall NCSs [9,10]. Initially, the data scheduling-based mechanisms assume that the NCSs have fixed data sampling period and propose methods to optimize resource allocations for competing demands [10]. Scheduling algorithms such as rate monotony (RM) scheduling, earliest deadline first (EDF) dynamic scheduling, and dead-bands scheduling, are of this category.…”

Section: Introductionmentioning

confidence: 99%

A Time-Delay-Bounded Data Scheduling Algorithm for Delay Reduction in Distributed Networked Control Systems

Zhao

Wan

et al. 2020

Mathematical Problems in Engineering

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As a key feature of networked control systems (NCSs), the time delays induced by communication medium sharing and data exchange over the system components could largely degrade the NCS performances or may even cause system instability, and thus, it is of critical importance to reduce time delays within NCSs. This paper studies the time-delay reduction problem in distributed NCSs and presents a dual-way data scheduling mechanism for time-delay reductions in delay-bounded NCSs with time-varying delays. We assess the time delays and their influences on the NCSs first with various delay factors being considered and then describe a one-way scheduling mechanism for network-delay reductions in NCSs. Based upon such a method, a dual-way scheduling algorithm is finally proposed for distributed NCSs with different types of transmitted data packets. Experiments are conducted on a remote teaching platform to verify the effectiveness of the proposed dual-way scheduling mechanism. Results demonstrate that, with the stability time-delay bound considered within the scheduling process, the proposed mechanism is effective for NCS time-delay reductions while addressing the stability, control accuracy, and settling time issues efficiently. Such a proposed mechanism could also be implemented together with some other existing control algorithms for time-delay reductions in NCSs. Our work could provide both useful theoretical guidance and application references for stable tracking control of delay-bounded NCSs.

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Section: Introductionmentioning

confidence: 99%