Control reconfiguration

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

Integrated scheduling and synthesis of control applications on distributed embedded systems

Abstract: Many embedded control systems comprise several control loops that are closed over a network of computation nodes. In such systems, complex timing behavior and communication lead to delay and jitter, which both degrade the performance of each control loop and must be considered during the controller synthesis. Also, the control performance should be taken into account during system scheduling. The contribution of this paper is a control--scheduling co-design method that integrates controller design with both static and priority-based scheduling of the tasks and messages, and in which the overall control performance is optimized.

Design and Control of Fault-Tolerant Nonisolated Multiphase Multilevel DC–DC Converters for Automotive Power Systems

Abstract: In this paper, a bidirectional, nonisolated dc–dc converter with several interleaved phases of multilevel modules for dual low-voltage automotive power systems is presented. Instead of using a two-level stage with short-circuit protection elements, a three-level module in a multiphase structure is proposed to achieve improved fault-tolerance. The dimensioning of the required flying capacitor for multilevel dc–dc converters is described. Further, benefits such as ripple reduction, automatic fault current limitation, and enhanced efficiency are achieved. Moreover, the control strategy for normal operation including the stability of the flying capacitor voltage as well as reconfiguration after semiconductor open- and short-circuit failure for ongoing degraded operation are explained.

Distribution feeder reconfiguration for operation cost reduction

Abstract: This paper describes a new feeder reconfiguration algorithm for the purpose of reducing the distribution network operating cost in a real-time operation environment. The methodology developed is a heuristic-based approach which emphasizes minimizing the cost of operation over a specified time period rather than a fixed operating point. The practical operating concerns of feeder reconfiguration and the coordination with other distribution automation applications are also addressed. The developed algorithm has been implemented as a production grade software. Test results on PG&E distribution feeders show that the performance of this software is efficient and robust.

Frequency and Radiation Pattern Reconfigurability of a Multi-Size Pixel Antenna

Abstract: Pixel reconfigurable apertures constitute one of the most adaptable structures regarding antenna reconfiguration, being capable to achieve frequency and pattern compound reconfiguration However, pixel antennas require a large amount of switches (typically above 100) that severely impact the antenna efficiency, complexity, cost and reconfiguration time This paper presents a novel technique to mitigate the inherent complexity of pixel antennas by including multiple sized pixels divided over driven and parasitic regions The technique has been applied to a planar monopole architecture leading to a low-complexity prototype of small dimensions and requiring only 12 switches Its reconfiguration properties have been fully characterized through exhaustive measurements Frequency reconfiguration is achieved from 1 GHz to 6 GHz with simultaneous beam-steering capabilities, being capable of synthesizing at each frequency an omnidirectional pattern and up to 5 directive patterns steered towards directions covering an angular range of almost 180°