See All Resources (468)
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Demonstrating Autonomous Mission Operations Onboard the International Space Station
A Publication, DAVID IVERSON's Collection - 8 years, 11 months ago
Shared By: DAVID IVERSON
The NASA Autonomous Mission Operations (AMO) project conducted an experiment to turn over operation and management of selected International Space Station (ISS) systems to the ...
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Discovery of Precursors to Adverse Events using Time Series Data
A Publication, Discovering Precursors to Adverse Events in Time Series - 8 years, 8 months ago
Shared By: Vijay Manikandan Janakiraman
We develop an algorithm for automatic discovery of precursors in time series data (ADOPT). In a time series setting, a precursor may be considered as ...
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A Publication, Bryan Matthews's Collection - 8 years, 11 months ago
Shared By: Bryan Matthews
The National Airspace (NAS) is constantly changing and adapting to new and complex challenges, and as a result Next Generation Air Transportation System (NextGen) will ...
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Identifying Precursors to Anomalies Using Inverse Reinforcement Learning
A Publication, Discovering Precursors to Adverse Events in Time Series - 8 years, 11 months ago
Shared By: Vijay Manikandan Janakiraman
In this paper, we consider the problem of discovering candidate precursors to anomalies in a set of time sequenced data. Typical scenarios involving time sequential ...
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Identifying Contributing Factors of Occupant Thermal Discomfort in a Smart Building
A Publication, Sustainability Base - 9 years ago
Shared By: RODNEY MARTIN
Modeling occupant behavior in smart buildings to reduce energy usage in a more accurate fashion has garnered much recent attention in the literature. Predicting occupant ...
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Scalable Causal Learning for Predicting Adverse Events in Smart Buildings
A Publication, Sustainability Base - 9 years ago
Shared By: RODNEY MARTIN
Emerging smart buildings, such as the NASA Sustainability Base (SB), have a broad range of energy-related systems, including systems for heating and cooling. While the ...
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Prognostic Techniques for Capacitor Degradation and Health Monitoring
A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
This paper discusses our initial efforts in constructing physics of failure models for electrolytic capacitors subjected to electrical stressors in DC-DC power converters. Electrolytic capacitors ...
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Integrated Diagnostic/Prognostic Experimental Setup for Capacitor Degradation and Health Monitoring
A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
This paper proposes the experiments and setups for studying diagnosis and prognosis of electrolytic capacitors in DC-DC power converters. Electrolytic capacitors and power MOSFET’s have ...
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A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
Studying and analyzing the ageing mechanisms of electronic components avionics in systems such as the GPS and INAV are of critical importance. In DC-DC power ...
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Implementation of Prognostic Methodologies to Cryogenic Propellant Loading Test-bed
A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
Prognostics methodologies determine the health state of a system and predict the end of life and remaining useful life. This information enables operators to take ...
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A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
This paper proposes a physics based degradation modeling and prognostics approach for electrolytic capacitors. Electrolytic capacitors are critical components in electronics systems in aeronautics and ...
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A Testbed for Implementing Prognostic Methodologies on Cryogenic Propellant Loading Systems
A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
Prognostics technologies determine the health state of a system and predict its remaining useful life. With this information, operators are able to make maintenance-related decisions, ...
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Application of Model Based Prognostics to Pneumatic Valves in a Cryogenic Propellant Loading Testbed
A Publication, Chetan Kulkarni's Collection - 9 years ago
Shared By: Chetan Kulkarni
Pneumatic-actuated valves are critical components in many applications, including cryogenic propellant loading for space operations. For these components, failures need to be predicted so that ...
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A Recursive Receding Horizon Planning for Unmanned Vehicles
A Publication, Prognostics CoE Publications - 9 years, 2 months ago
Shared By: Kai Goebel
This paper proposes a recursive receding horizon path planning algorithm for unmanned vehicles in nonuniform environments. In the proposed algorithm, the map is described by ...
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In-situ fatigue life prognosis for composite laminates based on stiffness degradation
A Publication, Prognostics CoE Publications - 9 years, 2 months ago
Shared By: Kai Goebel
In this paper, a real-time composite fatigue life prognosis framework is proposed. The proposed methodology combines Bayesian inference, piezoelectric sensor measurements, and a mechanical stiffness ...