Prognostics of Power MOSFETs under Thermal Stress Accelerated Aging using Data-Driven and Model-Based Methodologies

A Publication, Prognostics CoE Publications - 11 years, 7 months ago

Shared By: Miryam Strautkalns

An approach for predicting remaining useful life of power MOSFETs (metal oxide field effect transistor) devices has been developed. Power MOSFETs are semiconductor switching devices ...

Distributed Diagnosis in Uncertain Environments Using Dynamic Bayesian Networks

A Publication, Prognostics CoE Publications - 11 years, 7 months ago

Shared By: Miryam Strautkalns

This paper presents a distributed Bayesian fault diagnosis scheme for physical systems. Our diagnoser design is based on a procedure for factoring the global system ...

An Integrated Model-Based Diagnostic and Prognostic Framework

A Publication, Prognostics CoE Publications - 11 years, 7 months ago

Shared By: Miryam Strautkalns

Systems health monitoring is essential in guar- anteeing the safe, efficient, and correct opera- tion of complex engineered systems. Diagnosis, which consists of detection, isolation ...

A Structural Model Decomposition Framework for Systems Health Management

A Publication, Prognostics CoE Publications - 11 years, 7 months ago

Shared By: Miryam Strautkalns

Systems health management (SHM) is an impor- tant set of technologies aimed at increasing system safety and reliability by detecting, isolating, and identifying faults; and ...

Model-Based Diagnosis and Prognosis of a Water Recycling System

A Publication, Prognostics CoE Publications - 11 years, 7 months ago

Shared By: Miryam Strautkalns

A water recycling system (WRS) deployed at NASA Ames Research Center’s Sustainability Base (an energy efficient office building that integrates some novel technologies developed for ...

Data driven modeling of the simultaneous activities in ambient environments

A Publication, Farzad amirjavid's Collection - 11 years, 8 months ago

Shared By: Farzad amirjavid

Resident of a smart home, who may be an old person or an Alzheimer patient needing permanent assistance, actuates the world by realizing activities, which ...

Accelerated Aging in Electrolytic Capacitors for Prognostics

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

The focus of this work is the analysis of different degradation phenomena based on thermal overstress and electrical overstress accelerated aging systems and the use ...

Physics Based Electrolytic Capacitor Degradation Models for Prognostic Studies under Thermal Overstress

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

Electrolytic capacitors are used in several applications rang- ing from power supplies on safety critical avionics equipment to power drivers for electro-mechanical actuators. This makes ...

Designing Data-Driven Battery Prognostic Approaches for Variable Loading Profiles: Some Lessons Learned

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

Among various approaches for implementing prognostic algorithms data-driven algorithms are popular in the industry due to their intuitive nature and relatively fast developmental cycle. However, ...

Uncertainty Representation and Interpretation in Model-based Prognostics Algorithms based on Kalman Filter Estimation

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

This article discusses several aspects of uncertainty represen- tation and management for model-based prognostics method- ologies based on our experience with Kalman Filters when applied ...

A Comparison of Filter-based Approaches for Model-based Prognostics

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

Model-based prognostics approaches employ domain knowledge about a system, its components, and how they fail through the use of physics-based models, derived from first principles, ...

Requirements Flowdown for Prognostics and Health Management

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

Prognostics and Health Management (PHM) principles have considerable promise to change the game of lifecycle cost of engineering systems at high safety levels by providing ...

Investigating the Effect of Damage Progression Model Choice on Prognostics Performance

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

The success of model-based approaches to systems health management depends largely on the quality of the underly- ing models. In model-based prognostics, it is especially ...

A Model-based Prognostics Methodology for Electrolytic Capacitors Based on Electrical Overstress Accelerated Aging

A Publication, Prognostics CoE Publications - 11 years, 9 months ago

Shared By: Miryam Strautkalns

A remaining useful life prediction methodology for elec- trolytic capacitors is presented. This methodology is based on the Kalman filter framework and an empirical degradation ...