Maximum allowable delay bounds of networked control systems

Kim, Dongsung; Lee, Young Sam; Кwon, Wook Hyun; Park, Hong Seong

doi:10.1016/s0967-0661(02)00238-1

Cited by 333 publications

(200 citation statements)

References 17 publications

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“…The proposed stability criterion is expressed as a set of solvable linear matrix inequalities (LMIs) that can be solved using standard numerical packages [26][27] by causing it as a category of convex optimization problem 11, 12, 26 27 . Delaydependent stability criteria can be employed to compute the maximum value of network delays within which the NCTCS remains asymptotically stable 11,12,[29][30][31] . To the best of authors' knowledge, there is no such research in this field.…”

Section: Introductionmentioning

confidence: 99%

Stability of Networked Based Thermal Control System With Time-Invariant Delays

Venkatachalam¹,

Prabhakaran²,

Thirumarimurugan³

et al. 2017

Int. Res. J. Pharm.

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In this paper, the stability analysis of thermal control system with constant time-delay was used to analyze. In the analysis, PI controller is the essential part of the thermal control system, time-invariant feedback loop delays and then new stability criteria was identified. First, the system was mathematically formulated as a linear retarded continuous-time delayed differential equation with incremental system variables (state variables). Subsequently, by using the stability criterion's, maximum allowable bound of the network delay that the closed-loop system which can accommodate without losing stability, were computed for various subsets of the controller parameters (PI-controller). The obtained results are the more realistic operating condition in a real time temperature control system. The effectiveness of the proposed result is validated on a benchmark thermal control system.

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Section: Introductionmentioning

confidence: 99%

Stability of Networked Based Thermal Control System With Time-Invariant Delays

Venkatachalam¹,

Prabhakaran²,

Thirumarimurugan³

et al. 2017

Int. Res. J. Pharm.

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“…The performance of the distributed system is affected by network-induced parameters such as delays, jitters, packet losses and link failures [1], [2]. This system has heavy application, such as those in the fields of aerospace, military visual processing, or industrial computer processors [3].…”

Section: Introductionmentioning

confidence: 99%

Image Transmission in Military Network Using Bézier Curve

Rizal¹,

Kim²

2015

JACN

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Abstract-This paper proposed a method for reconstruct image by using Bézier Curve function. One of the causes of errors in image reconstruction is lack of sampling. In order to solve that problem, this paper proposes a method by using Bézier Curve to interpolate data between sampling points to reduce the error. The proposed method is compared to the previous works; compressive sampling and discrete Fourier transform (DFT). Compressive sampling is a method which has small number of data sample and DFT is used to perform Fourier analysis in many practical applications in digital signal processing. The result shows that image reconstruction using Bézier curve has closer quality to the original image compared to compressive sampling and DFT while it can maintain small size of reconstructed images.

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“…The results are merged in a new protocol called try-once-discard (TOD), for which Walsh, Belfiman and Bushnell (2002) provide an analytical proof of the global exponential stability for both the new protocol and the more commonly used (statically scheduled) access methods. In Kim, Lee, Kwon and Park (2003), a new scheduling strategy has been proposed based on a time division protocol. The objective is to obtain a maximum allowable delay bound for the scheduling of an NCS.…”

Section: Introductionmentioning

confidence: 99%

Networked control with delay measurement and estimation

Vatanski¹,

Georges

Aubrun

et al. 2009

Control Engineering Practice

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In research on networked control systems (NCS), the performance of the control system is assumed to be affected by network-induced parameters such as delays, jitters, packet losses and link failures. In this paper, two delay compensation methods are studied, adaptive Smith Predictor and robust control, in the framework of Networked Control Systems while considering the protocol specifications. First, a clock synchronization protocol is implemented in each device of the network, thereby providing the possibility of end-to-end delay measurement, and a compensation strategy based on this measurement and the adaptive Smith Predictor is applied.Secondly, the end-to-end upper bound delay estimate is calculated on the basis of the network architecture and the traffic estimation, and then subsequently used in a robust control based compensation strategy. The switched Ethernet network is used as an example of the communication network of the NCS.

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Maximum allowable delay bounds of networked control systems

Cited by 333 publications

References 17 publications

Stability of Networked Based Thermal Control System With Time-Invariant Delays

Stability of Networked Based Thermal Control System With Time-Invariant Delays

Image Transmission in Military Network Using Bézier Curve

Networked control with delay measurement and estimation

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