Control loop performance analysis over networked control systems

Yépez, José; Martí, Pau; Fuertes, Josep M.

doi:10.1109/iecon.2002.1182853

Cited by 27 publications

(10 citation statements)

References 5 publications

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“…The main issue from the perspective of design of the supervision processes is how to design delaytolerant supervision for closed loop control. [3] studies synchronous versus asynchronous actuation in NCS where delays are expected, concluding that asynchronous approaches can improve the performance of control loops in such contexts. Knowledge and correct estimation of delays is pointed out as an important factor to improve the approaches.…”

Section: Related Workmentioning

confidence: 98%

Controlling operation and timings in distributed sensor networks with wireless components

Furtado¹,

Cecílio²

2012

2012 IEEE International Conference on Systems, Man, and Cybernetics (SMC)

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In this paper we describe an approach to provide overthe-air operation configuration capabilities and end-to-end operation timing monitorization and control in networked control systems (NCS) with wireless sensor network (WSN) components. The idea is to deploy wireless sensor networks to cover regions of the factory premises, plugging each into a NCS through a gateway, then configuring nodes for operation using simple commands, as opposed to programming and uploading every node. The system should also provide deterministic timing control. In this paper we describe the configuration approach and timing planning, then we show the configuration user interface and operation timing monitoring results.

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Section: Related Workmentioning

confidence: 98%

Controlling operation and timings in distributed sensor networks with wireless components

Furtado¹,

Cecílio²

2012

2012 IEEE International Conference on Systems, Man, and Cybernetics (SMC)

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“…The main issue from the perspective of design of the supervision processes is how to design delay-tolerant supervision for closed loop control. Yepez et al [2002] study synchronous versus asynchronous actuation in NCS where delays are expected, concluding that asynchronous approaches can improve the performance of control loops in such contexts. Knowledge and correct estimation of delays is pointed out as an important factor to improve the approaches.…”

Section: Networked Control Systems Issues and Performance Controlmentioning

confidence: 99%

Configuration and operation of networked control systems over heterogeneous WSANs

Furtado

Cecílio

2013

ACM Trans. Embed. Comput. Syst.

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There have been both research and commercial advances on applying Wireless Sensor and Actuator Networks (WSN) in industrial premises. These have cost advantages related to avoiding some cabled deployments. A possible architecture involves a Networked Control System (NCS) with many small WSN subnetworks, cabled nodes and computer servers (e.g., servers, control stations). In those systems individual sensor nodes can be programmed, as opposed to cabled analog systems. We investigate approaches for networked-wide configuration, where all nodes-cabled or WSN sensors-can be configured with simplicity from a single interface, instead of hand-coding or complex configurations of individual nodes. We propose an architecture and approach for configuration and operation. Previous related proposals on middleware involving WSNs suffer from two major limitations: they either program within an individual WSN or configure operation outside WSNs, wrapping data coming from WSN. They do not allow configuring WSN and non-WSN nodes for operation from a single interface. We discuss the architecture and propose the NCSWSN configuration and operation approach. We are applying this system in an industrial testbed, therefore we test the approach and also show user interfaces and results from the deployment. ACM Reference Format:Furtado, P. and Cecílio, J. 2013. Configuration and operation of networked control systems over heterogeneous WSANs.

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“…This implies that the networked predictive controller can actively compensate for the constant network delay. Since the controller parameters do not need to be changed, the network delay can be ignored during the design of the PI controller, which is quite different from the traditional method (taking into account the delays in the controller design stage or designing a communication protocol that minimizes delay [15]). …”

Section: ) Constant Network Delaymentioning

confidence: 99%

“…If there exists a positive definite matrix such that (15) for all and , then the closed-loop system (14) is stable for all random delay [16], [21].…”

Section: Stability Analysis Of the Npc Systemsmentioning

confidence: 99%

Design and Practical Implementation of Internet-Based Predictive Control of a Servo System

Chai

Liu²,

Rees³

et al. 2008

IEEE Trans. Contr. Syst. Technol.

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This brief discusses the design and practical implementation of an Internet-based predictive control strategy. This novel control strategy can compensate for the random network delay and data dropout in an active way. In order to test the performance of the proposed control scheme, the offline simulation and practical implementation of an Internet-based servo control system are carried out. At the same time, the stability of the control scheme is also studied. The simulation and experimental results illustrate the feasibility and efficiency of the proposed Internet-based predictive control scheme.Index Terms-Internet-based predictive control, networked system, practical implementation.

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Control loop performance analysis over networked control systems

Cited by 27 publications

References 5 publications

Controlling operation and timings in distributed sensor networks with wireless components

Controlling operation and timings in distributed sensor networks with wireless components

Configuration and operation of networked control systems over heterogeneous WSANs

Design and Practical Implementation of Internet-Based Predictive Control of a Servo System

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