On-line intermittent connector anomaly detection

A Publication, EDWARD BALABAN's Collection - 12 years, 8 months ago

Shared By: EDWARD BALABAN

This paper investigates a non-traditional use of differential current sensor and current sensor to detect intermittent disconnection problems in connectors. An intermittent disconnect, often resulting ...

A Model-based Avionic Prognostic Reasoner (MAPR)

A Publication, EDWARD BALABAN's Collection - 12 years, 8 months ago

Shared By: EDWARD BALABAN

The Model-based Avionic Prognostic Reasoner (MAPR) presented in this paper is an innovative solution for non-intrusively monitoring the state of health (SoH) and predicting the ...

Battery Charge Depletion Prediction on an Electric Aircraft

A Publication, Brian Bole's Collection - 12 years, 8 months ago

Shared By: Brian Bole

Validation of prognostic technologies through ground and flight tests is an important step in maturing these novel technologies and deploying them on real-world systems. To ...

Propulsion IVHM Technology Experiment Overview

A Publication, EDWARD BALABAN's Collection - 12 years, 8 months ago

Shared By: EDWARD BALABAN

NASA researchers recently demonstrated successful real-time fault detection and isolation of a virtual reusable launch vehicle main propulsion system. Using a detailed simulation of a ...

Replication of Electric Aircraft Powertrain Dynamics and Inner-Loop Control for V&V of System Health Management ...

A Publication, Brian Bole's Collection - 12 years, 8 months ago

Shared By: Brian Bole

Software-in-the-loop and hardware-in-the-loop testing of failure prognostics and decision making tools for aircraft systems will facilitate more comprehensive and cost-effective testing than what is practical ...

Removing Spikes While Preserving Data and Noise using Wavelet Filter Banks

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

Many diagnostic datasets suffer from the adverse effects of spikes that are embedded in data and noise. For example, this is true for electrical power ...

New Sensing Application to Diagnose Power Semiconductor Aging in Actuator Power Drive Systems

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

This paper presents a new sensing application to diagnose power semiconductor aging in power drive systems. It has been shown previously that device parasitic characteristics ...

Estimation of Faults in DC Electrical Power System

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

This paper demonstrates a novel optimizationbased approach to estimating fault states in a DC power system. The model includes faults changing the circuit topology along ...

Inverse Modeling Using a Wireless Sensor Network (WSN) for Personalized Daylight Harvesting

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

Smart lighting systems in low energy commercial buildings can be expensive to implement and commission. Studies have also shown that only 50% of these systems ...

Modeling SiO2 Ion Impurities Aging in Insulated Gate Power Devices Under Temperature and Voltage Stress

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

This paper presents a formal computational methodology to explain how the oxide in semiconductors degrades over time and the dependence of oxide degradation on voltage ...

Diagnosing Faults in Electrical Power Systems of Spacecraft and Aircraft

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

Electrical power systems play a critical role in spacecraft and aircraft, and they exhibit a rich variety of failure modes. This paper discusses electrical power ...

Empirical Evaluation of Diagnostic Algorithm Performance Using a Generic Framework

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

A variety of rule-based, model-based and datadriven techniques have been proposed for detection and isolation of faults in physical systems. However, there have been few ...

A Survey of Health Management User Objectives in Aerospace Systems Related to Diagnostic and Prognostic ...

A Publication, Prognostics CoE Publications - 12 years, 8 months ago

Shared By: SCOTT POLL

One of the most prominent technical challenges to effective deployment of health management systems is the vast difference in user objectives with respect to engineering ...

Prognostics Of Power Mosfets Under Thermal Stress Accelerated Aging Using Data-Driven And Model-Based Methodologies

A Publication, Jose Celaya Galvan's Collection - 12 years, 8 months ago

Shared By: Jose Celaya Galvan

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 ...