Active actuator fault detection and diagnostics in HVAC systems
Proceedings of the Fourth ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings, 2012 This paper introduces a new method for performing actuator fault detection and diagnostics (FDD) in heating ventilation and air conditioning (HVAC) systems. The proposed actuator FDD strategy, for testing whether an actuator is stuck in a single position, uses a two-tier approach that includes a dynamic model-based detector and a fast-deciding steady ...
James Weimer +7 more
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Infrared thermography‐based diagnostics on power equipment: State‐of‐the‐art
High Voltage, 2021 As a non‐contact temperature distribution measurement method, infrared thermography (IRT) has emerged as an indispensable tool in condition monitoring and fault diagnosis of electrical equipment based on the absolute and relative temperature values ...
Changjie Xia +6 more
doaj +1 more source
Experimental Study on Fault Detection Algorithm Using Regression Method for Plural Indoor Units Faults of Multi-Heat Pump System under Heating Mode [PDF]
, 2012 This paper presents the fault detection algorithm using regression method for plural indoor units faults of multi-heat pump system under heating mode. To develop the fault detection algorithm, experiment was performed under no fault mode.
Kim, Hak Soo, Kim, Min Soo, Cho, Min Ki
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Fault Detection and Diagnostics for Commercial Coolers and Freezers
HVAC&R Research, 2009 Most of the previous diagnostics research for vapor-compression equipment has been performed for packaged air conditioners and chillers. This paper describes application of a decoupling-based diagnostic technique that was originally developed for air conditioners to equipment used in walk-in coolers and freezers.
Wichman, Adam, Braun, James E.
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The Detection of Shaft Misalignments using Motor Current Signals from a Sensorless Variable Speed Drive [PDF]
, 2015 Shaft misalignments are common problems in rotating machines which cause additional dynamic and static loads, and vibrations in the system, leading to early damages and energy loss.
Gu, Fengshou +4 more
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International Journal of Prognostics and Health Management, 2019 With the increased availability of condition monitoring data on the one hand and the increased complexity of explicit system physics-based models on the other hand, the application of data-driven approaches for fault detection and isolation has recently ...
Manuel Arias Chao +3 more
doaj +1 more source
A change-detection algorithm for short-circuit fault detection in closed-loop AC drives [PDF]
, 2013 This paper deals with an on-line method for turn-to-turn short-circuit fault detection in low-voltage permanent-magnet synchronous machine drives. Due to the closed-loop control, the fault effects are reflected in the voltage.
Johan Gyselinck +10 more
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Gas-path Diagnostics and Prognostics for Aero-engines Using Fuzzy Logic and Time Series Analysis [PDF]
, 2004 Reducing the direct operating-costs is now crucial in order to ensure competitive advantages for airlines and manufacturers, and so effective advanced engine-condition monitoring methodologies are necessary.
Marinai, Luca
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Automated Fault Detection and Diagnostics in HVAC Systems
, 2023 In this comprehensive research paper, we delve into the transformative realm of Automated Fault Detection and Diagnostics (AFDD) within Heating, Ventilation, and Air Conditioning (HVAC) systems. As the intricacies of HVAC systems continue to evolve, AFDD emerges as a pivotal and proactive solution for the identification and diagnosis of faults, thereby
Sharma, Vibhu, Mistry, Vrushank
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Evaluating Fault Detection and Diagnostics Protocols Applied to Air-Cooled Vapor Compression Air-Conditioners [PDF]
, 2012 Fault detection and diagnostics (FDD) tools are being increasingly applied in air-conditioning systems. There are many different protocols used in these FDD tools, so an important question to ask is: how well do the protocols work?
Yuill, David P., Braun, James E.
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