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: It is the view of this paper that addressing safety issues is the key to further development of FTCs.
161 citations
02 May 2006
TL;DR: In this paper, the authors compare and contrast two methods for implementing modular reconfiguration in Virtex FPGAs, one of which offers simplicity and fast reconfigure times, but limits the geometry and connectivity of the system.
Abstract: Modular systems implemented on field-programmable gate arrays (FPGAs) can benefit from being able to load and unload modules at run-time, a concept that is of much interest in the research community. Although dynamic partial reconfiguration is possible in Virtex and Spartan series FPGAs, the configuration architecture of these devices is not amenable to modular reconfiguration, a limitation which has relegated research to theoretical or compromised resource allocation models. Two methods for implementing modular reconfiguration in Virtex FPGAs are compared and contrasted. The first method offers simplicity and fast reconfiguration times, but limits the geometry and connectivity of the system. The second method, developed recently, enables modules to be allocated arbitrary areas of the FPGA, bridging the gap between theory and reality and unlocking the latent potential of dynamic reconfiguration. The cost of this advancement is increased reconfiguration time. The second method has been demonstrated in three applications, including the first reported implementation of modular reconfiguration in a Virtex-4 device.
161 citations
TL;DR: In this article, a tri-level defender-attacker-defender (DAD) model is built to find the best hardening plan under malicious attacks given the available defending resources and operational restoration measures for a distribution system.
161 citations
TL;DR: It is shown that the stability and tracking performances of the closed-loop system can be achieved even in the presence of unknown non linear faults, and the FTC scheme can handle the nonaffine nonlinear faults effectively.
Abstract: This paper studies the fuzzy adaptive output feedback fault-tolerant control (FTC) problem for a class of single-input and single-output uncertain nonlinear systems with time-varying nonaffine nonlinear faults in strict-feedback form. In the design procedure, filtered signals are adopted to circumvent algebraic loop problems on implementing the usual controllers. By using fuzzy logic systems to approximate the unknown nonlinearity effects and changes in model dynamics due to faults, a fuzzy state observer is first presented to estimate the unmeasured states. Based on the online estimating information from the adaptive mechanism, an observer-based dynamic output feedback fault-tolerant controller is designed via the backstepping technique. It is shown that the stability and tracking performances of the closed-loop system can be achieved even in the presence of unknown nonlinear faults. In comparison with the existing approaches, the FTC scheme can handle the nonaffine nonlinear faults effectively. Finally, a simulation example is included to validate the advantages of the proposed approaches.
160 citations
159 citations