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Sensors 2016, 16(9), 1430; doi:10.3390/s16091430

Effect of Sensors on the Reliability and Control Performance of Power Circuits in the Web of Things (WoT)

1
Department of Electrical Engineering, Yeungnam University, Gyeongsan 38541, Korea
2
Agency for Defense Development, Daejeon 34186, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Massimo Poncino and Ka Lok Man
Received: 25 June 2016 / Revised: 10 August 2016 / Accepted: 31 August 2016 / Published: 6 September 2016
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Abstract

In order to realize a true WoT environment, a reliable power circuit is required to ensure interconnections among a range of WoT devices. This paper presents research on sensors and their effects on the reliability and response characteristics of power circuits in WoT devices. The presented research can be used in various power circuit applications, such as energy harvesting interfaces, photovoltaic systems, and battery management systems for the WoT devices. As power circuits rely on the feedback from voltage/current sensors, the system performance is likely to be affected by the sensor failure rates, sensor dynamic characteristics, and their interface circuits. This study investigated how the operational availability of the power circuits is affected by the sensor failure rates by performing a quantitative reliability analysis. In the analysis process, this paper also includes the effects of various reconstruction and estimation techniques used in power processing circuits (e.g., energy harvesting circuits and photovoltaic systems). This paper also reports how the transient control performance of power circuits is affected by sensor interface circuits. With the frequency domain stability analysis and circuit simulation, it was verified that the interface circuit dynamics may affect the transient response characteristics of power circuits. The verification results in this paper showed that the reliability and control performance of the power circuits can be affected by the sensor types, fault tolerant approaches against sensor failures, and the response characteristics of the sensor interfaces. The analysis results were also verified by experiments using a power circuit prototype. View Full-Text
Keywords: power circuit; Web of Things (WoT); energy harvesting; reliability; filter; sensors power circuit; Web of Things (WoT); energy harvesting; reliability; filter; sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bae, S.; Kim, M. Effect of Sensors on the Reliability and Control Performance of Power Circuits in the Web of Things (WoT). Sensors 2016, 16, 1430.

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