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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
TL;DR: The results of simulations in CarSim and vehicle experimental tests show the effectiveness of the proposed active fault-tolerant control system in dealing with certain IWM faults.
Abstract: An active fault-tolerant control (AFTC) system is proposed in this paper for electric vehicles with independently driven in-wheel motors (IWMs). It comprises a baseline controller, a set of reconfigurable controllers, a fault detection and diagnosis (FDD) mechanism, and a decision mechanism. The baseline controller, which is actually a passive fault-tolerant controller, is applied to accommodate actuator faults and stabilize the faulty vehicle when the actuator fault occurs. After the fault is detected and estimated by the FDD mechanism, a proper reconfigurable controller is switched ON to achieve optimal postfault performance. Taking advantage of the robust gain-scheduling algorithm, the loss-of-effectiveness and additive faults of the IWMs can be accommodated by the baseline controller, and the estimation error of the FDD mechanism can be tolerated by the reconfigurable controllers. The results of simulations in CarSim and vehicle experimental tests show the effectiveness of this AFTC system in dealing with certain IWM faults.

99 citations

Journal ArticleDOI
C. Dick1, F.J. Harris
TL;DR: An overview of some FPGA DSP applications, and a brief look at how the dynamic reconfiguration aspect of certain FPGAs could be exploited in future-generation communication technologies.
Abstract: For the past two decades software programmable digital signal processors and ASICs have provided hardware solutions for signal processing system designers A new option has become available: field programmable gate arrays FPGA-based DSP platforms allow the designer to realize a data path that exactly matches the required processing, while at the same time maintaining the flexibility of a software approach This article presents an overview of some FPGA DSP applications Several filter designs are presented, and the use of CORDIC arithmetic for constructing an FPGA carrier recovery loop is outlined In addition to presenting design examples that can be realized using present-generation devices and tools, we take a brief look at how the dynamic reconfiguration aspect of certain FPGAs could be exploited in future-generation communication technologies

99 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a two-stage process to find a suboptimal solution by analyzing the mesh distribution system in which all open switches are simulated to be closed and a radial distribution system is determined as an intermediate solution.
Abstract: Feeder reconfiguration for use by distribution management systems is discussed in this paper. Multiple objectives are proposed to reflect realistic operating environments while achieving all benefits from feeder reconfiguration. The multiple objectives considered are minimization of power losses, load balancing among supply transformers, minimization of the worst voltage drop, minimization of service interruption frequency, and balanced service of important customers for enhanced service reliability. The objective function containing five different objectives are optimized subject to capacity and protection device constraints. The overall solution approach is a two-stage process. In the first stage, a suboptimal solution is found by analyzing the mesh distribution system in which all open switches are simulated to be closed. Applying special power flow analyses to this mesh network, a radial distribution system is determined as an intermediate solution. In the second stage, this solution is continuously improved by the branch exchange scheme. Special topology models are also developed to accelerate the search procedure. Use of the algorithm is illustrated by numerical examples.

98 citations

11 May 2011
TL;DR: This work developed a prototype Dreams engine to test the distributed protocol, using an actor library for the Scala language and statically discover regions of the coordination layer that can execute independently, thus achieving a truly decoupled execution of connectors.
Abstract: This work contributes to the field of coordination, in particular to Reo, by improving existing approaches to execute synchronisation models in three major ways. First, this work supports decoupled execution and lightweight reconfiguration. We developed a prototype Dreams engine to test our distributed protocol, using an actor library for the Scala language. Reconfiguration of a small part of the system is independent of the execution or behaviour of unrelated parts of the same system. Second, Dreams outperforms previous Reo engines by using constraint satisfaction techniques. In each round of the execution of the Dreams framework, descriptions of the behaviour of all building blocks are combined and a coordination pattern for the current round is chosen using constraint satisfaction techniques. This approach requiring less time than previous attempts that collect all patterns before selecting one. Third, our work improves scalability by identifying synchronous regions. We statically discover regions of the coordination layer that can execute independently, thus achieving a truly decoupled execution of connectors. Consequently, the constraint problem representing the behaviour at each round is smaller and more easily solved.

98 citations

Proceedings ArticleDOI
16 Dec 1998
TL;DR: It is shown that the key element is the design of sufficiently robust individual controllers for each of the damage conditions using a combination of inverse dynamics and output error feedback control laws.
Abstract: We consider a problem of designing a reconfigurable control strategy that achieves acceptable flight performance in the presence of wing battle damage for a tailless advanced fighter aircraft (TAFA). This is a complex practical problem since wing damage results in abrupt variation in the aircraft dynamics. Hence fast and accurate control reconfiguration is vital for assuring aircraft survivability. Our suggested reconfigurable controller is based on the concept of multiple models, switching, and tuning. The overall control system consists of multiple parallel identification models, describing different percentages of wing damage, and corresponding controllers. Based on a suitably chosen switching mechanism, the system quickly finds the model that is closest to the current damage mode, and switches to the corresponding controller achieving excellent overall performance. In addition, the boundedness of the signals in the system is guaranteed if the switching interval is chosen to be sufficiently small. It is shown that the key element is the design of sufficiently robust individual controllers for each of the damage conditions. This has been accomplished using a combination of inverse dynamics and output error feedback control laws. The properties of the overall system are illustrated through simulations using linearized TAFA models provided by Boeing. Simulation results have demonstrated the potential of the multiple model-based approach to solve complex practical reconfigurable control design problems.

98 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