Topic
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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TL;DR: This paper proposes a novel fault-tolerant control (FTC) scheme for direct torque control of induction motor (IM) drives against the line current sensor failures and it can be universally applied with any speed control schemes involving IM drive.
Abstract: This paper proposes a novel fault-tolerant control (FTC) scheme for direct torque control of induction motor (IM) drives against the line current sensor failures. Three major steps involved in the proposed FTC scheme are the detection of sensor fault, isolation of the same, and finally, the reconfiguration by proper estimation. Third-difference operator employed in the motor line current is found suitable for the detection of the sensor fault, while flux-linkage observer-based current estimation scheme performs the task of estimation of line current post the occurrence of the fault. Furthermore, a decision-making logic circuitry isolates the faulty signal and simultaneously selects the appropriate estimated current signal to make the drive fault-tolerant. The proposed current sensor FTC scheme is simple and unique in nature. Moreover, it can be universally applied with any speed control schemes involving IM drive. The proposed scheme is simulated and extensively tested in MATLAB/Simulink. The obtained simulation results are also verified using a dSPACE-1104-based IM drive laboratory prototype to show the effectiveness of the scheme.
104 citations
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02 Mar 2004TL;DR: A new and efficient mechanism to tolerate failures in interconnection networks for parallel and distributed computers, denoted as Immunet, is presented, which automatically reacts with a hardware reconfiguration of the surviving network resources in the presence of failures.
Abstract: A new and efficient mechanism to tolerate failures ininterconnection networks for parallel and distributedcomputers, denoted as Immunet, is presented in this work.In the presence of failures, Immunet automatically reactswith a hardware reconfiguration of the surviving networkresources. Immunet has four important advantages overprevious fault-tolerant switching mechanisms. Its lowhardware costs minimize the overhead that the networkmust support in absence of faults. As long as the networkremains connected, Immunet can tolerate any number offailures regardless of their spatial and temporalcombinations. The resulting communication infrastructureprovides optimized adaptive minimal routing over thesurviving topology. The system behavior under successivefailures exhibits graceful performance degradation.Immunet reconfiguration can be totally transparent tothe applications running on the parallel system as they willonly be affected by the loss of those data packetscirculating through the broken components. The rest of thepackets will suffer only a tolerable delay induced by thetime employed to perform the automatic networkreconfiguration. Descriptions of the hardware networkarchitecture and detailed synthetic and execution-drivensimulations will demonstrate the benefits of Immunet.
104 citations
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TL;DR: This work proposes to address the problem of determining the optimal number of devices and their optimal location in a two-stage decomposition approach by dividing the solution space into independent subspaces, and solving the optimization problems in each subspace.
Abstract: The growing demand for improved quality of service increases the importance of network automation, namely the investment in remote-controlled switch (RCS) devices. These allow improving the fault isolation and reconfiguration time and therefore increasing the system quality of service. The investment in switch devices comes at a cost and thus must be optimized. The problem of determining the optimal number of devices and their optimal location is a difficult problem: the solution space is combinatorial and the objective function is nonanalytical. We propose to address this problem in a two-stage decomposition approach. Results are presented to i) divide the solution space into independent subspaces, and then ii) solve the optimization problems in each subspace. The solution approach is illustrated for a real distribution network problem.
104 citations
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TL;DR: In this article, the causal properties of bond graphs not only allow validating the model, but also provide the computational algorithms to eliminate the unknown variables from coupled thermo-fluid models and thus generate analytical redundancy relations (ARR) in terms of measurements and parameters.
103 citations
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01 Apr 2004TL;DR: A system to integrate dynamic process planning and dynamic production scheduling for the purpose of increasing the responsiveness of adaptive manufacturing systems in accommodating dynamic market changes is developed.
Abstract: Due to the dynamic fluctuation of customer demands in the global market, manufacturing enterprises are facing difficulties in rapidly responding to market changes. The aim of this research is to develop a system to integrate dynamic process planning and dynamic production scheduling for the purpose of increasing the responsiveness of adaptive manufacturing systems in accommodating dynamic market changes (rapidly changing demand patterns or product varieties). The concept of Multi-Agent Systems (MAS) has been adopted in this study. All of the tasks related to process planning, optimization and scheduling in this system are carried out by autonomous agents that are capable of interacting and negotiating with each other to bid for jobs and make decisions. On the one hand, this system optimizes the utilization of manufacturing resources and on the other hand, it also provides a platform where the reconfiguration of manufacturing systems can be assessed. This system has been implemented on a Java platform and a case study is provided to elaborate on this system and evaluate its implementation.
103 citations