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Control reconfiguration

About: Control reconfiguration is a research topic. Over the lifetime, 22423 publications have been published within this topic receiving 334217 citations.


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Journal ArticleDOI
27 Aug 2009-Sensors
TL;DR: The experimental study provides new proof concerning the ability of event-based control strategies to minimize the data exchange among the control agents (sensors, controllers, actuators) when an error-free control of the process is not a hard requirement.
Abstract: This paper is an experimental study of the utilization of different event-based strategies for the automatic control of a simple but very representative industrial process: the level control of a tank. In an event-based control approach it is the triggering of a specific event, and not the time, that instructs the sensor to send the current state of the process to the controller, and the controller to compute a new control action and send it to the actuator. In the document, five control strategies based on different event-based sampling techniques are described, compared, and contrasted with a classical time-based control approach and a hybrid one. The common denominator in the time, the hybrid, and the event-based control approaches is the controller: a proportional-integral algorithm with adaptations depending on the selected control approach. To compare and contrast each one of the hybrid and the pure event-based control algorithms with the time-based counterpart, the two tasks that a control strategy must achieve (set-point following and disturbance rejection) are independently analyzed. The experimental study provides new proof concerning the ability of event-based control strategies to minimize the data exchange among the control agents (sensors, controllers, actuators) when an error-free control of the process is not a hard requirement.

72 citations

01 Jan 2008
TL;DR: This paper evaluates the interest and limitations when using DPR in professional electronics applications and provides guidelines to improve its applicability and introduces a fast reconfiguration manager providing an 84-time improvement compared to the vendor solution.
Abstract: Correspondence should be addressed to Philippe Manet,philippe.manet@uclouvain.beReceived 29 February 2008; Revised 11 July 2008; Accepted 3 November 2008Recommended by Guy GogniatSignal and image processing applications require a lot of computing resources. For low-volume applications like in professionalelectronics applications, FPGA are used in combination with DSP and GPP in order to reach the performances required bythe product roadmaps. Nevertheless, FPGA designs are static, which raises a flexibility issue with new complex or softwaredefined applications like software-defined radio (SDR). In this scope, dynamic partial reconfiguration (DPR) is used to bringa virtualization layer upon the static hardware of FPGA. During the last decade, DPR has been widely studied in academia.Nevertheless, there are very few real applications using it, and therefore, there is a lack of feedback providing relevant issues toaddress in order to improve its applicability. This paper evaluates the interest and limitations when using DPR in professionalelectronicsapplicationsandprovidesguidelinestoimproveitsapplicability.Itmakesafairevaluationbasedonexperimentsmadeonasetofsignalandimageprocessingapplications.ItidentifiesthemissingelementsofthedesignflowtouseDPRinprofessionalelectronics applications. Finally, itintroducesafastreconfiguration manager providingan 84-timeimprovement compared tothevendor solution.Copyright © 2008 Philippe Manet et al. This is an open access article distributed under the Creative Commons AttributionLicense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properlycited.

72 citations

Journal ArticleDOI
TL;DR: A new deadlock-free distributed reconfiguration protocol that is able to asynchronously update routing tables without stopping user traffic is proposed that is valid for any topology, including regular as well as irregular topologies.
Abstract: High-speed local area networks (LANs) consist of a set of switches interconnected by point-to-point links, and hosts linked to those switches through a network interface card. High-speed LANs may change their topology due to switches being turned on/off, hot expansion, link remapping, and component failures. In these cases, a distributed reconfiguration protocol analyzes the topology, computes the new routing tables, and downloads them to the corresponding switches. Unfortunately, in most cases, user traffic is stopped during the reconfiguration process to avoid deadlock. These strategies are called static reconfiguration techniques. Although network reconfigurations are not frequent, static reconfiguration such as this may take hundreds of milliseconds to execute, thus degrading system availability significantly. Several distributed real-time applications have strict communication requirements; Distributed multimedia applications have similar, although less strict, quality of service (QoS) requirements. Both stopping packet transmission and discarding packets due to the reconfiguration process prevent the system from satisfying the above requirements. Therefore, in order to support hard real-time and distributed multimedia applications over a high-speed LAN, we need to avoid stopping user traffic and discarding packets when the topology changes. In this paper, we propose a new deadlock-free distributed reconfiguration protocol that is able to asynchronously update routing tables without stopping user traffic. This protocol is valid for any topology, including regular as well as irregular topologies. It is also valid for packet switching as well as for cut-through switching techniques and does not rely on the existence of virtual channels to work. Simulation results show that the behavior of our protocol is significantly better than for other protocols based on stopping user traffic.

72 citations

Journal ArticleDOI
Tao Tao1, Wenxiang Zhao1, Yuxuan Du1, Yu Cheng1, Jihong Zhu2 
TL;DR: A fault-tolerant finite control set model predictive control for a five-phase permanent-magnet (PM) motor drive, which offers reduced computation burden and simplified control model, is proposed, which is very suitable for the real-time system.
Abstract: This article proposes a fault-tolerant finite control set model predictive control for a five-phase permanent-magnet (PM) motor drive, which offers reduced computation burden and simplified control model. The virtual voltage vectors synthesized from two basic vectors are used to reduce the computation burden. Meanwhile, the steady-state performance is improved. Combining with a reduced decoupling matrix, the discrete model of the five-phase PM motor before and after fault remains unchanged. So, the reconfiguration of the control structure is minimal. Then, a control set and corresponding switching sequence are proposed, which are very suitable for the real-time system. Finally, the validity of the proposed fault-tolerant control is proved by experiments.

72 citations

Proceedings ArticleDOI
TL;DR: The CONRO project as discussed by the authors proposes a low power microprocessor, memory chips, sensors, actuators, power supplies, and miniature mechanical connectors used for communication and power sharing for metamorphic robots.
Abstract: Metamorphic robots are an emerging field in which robotics can dynamically reconfigure shape and size not only for individual roots but also for complex structures that are formed by multiple robots. Such capability is highly in tasks such as fire fighting, earthquake rescue, and battlefield scouting, where robots must go through unexpected situations and obstacles and perform tasks that are difficult for fixed-shape robots. This research direction present a number of technical research challenges. Specifically, metamorphic robots must be able to decompose and reassemble at will from a set of basic connectable modules. Such modules must be small, self-sufficient and relatively homogeneous. In this paper, we present our approach to address these issue and describe the design of the CONRO modules. These modules are equipped with a low power micro-processor, memory chips, sensors, actuators, power supplies, and miniature mechanical connectors used for communication and power sharing. We will also describe a set of control mechanisms for controlling gaits and reconfigurations. We conclude the paper with a status report of the CONRO project and a list of the future work needed to fully realize the construction of the CONRO metamorphic robots.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

72 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023784
20221,765
2021778
2020958
2019976
20181,060