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

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

Model-based prognostics approaches use domain knowledge about a system and its failure modes through the use of physics-based models. Model-based prognosis is generally divided into ...

Improving Diagnosability of Hybrid Systems through Active Diagnosis

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

Fault diagnosis is key to ensuring system safety through fault-adaptive control. This task is diffcult in hybrid systems with combined continuous and discrete behaviors because ...

An Event-based Approach to Hybrid Systems Diagnosability

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

Diagnosability is an important issue in the design of diagnostic systems, because it helps identify whether sufficient information is available to distinguish all the faults. ...

Dynamical Model of Rocket Propellant Loading with Liquid Hydrogen

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

A dynamical model describing the multi-stage process of rocket propellant loading has been developed. It accounts for both the nominal and faulty regimes of cryogenic ...

Model-based Prognostics with Concurrent Damage Progression Processes

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

Model-based prognostics approaches rely on physics-based models that describe the behavior of systems and their components. These models must account for the several different damage ...

Temperature Stratification in a Cryogenic Fuel Tank

A Publication, Prognostics CoE Publications - 10 years, 10 months ago

Shared By: Matthew Daigle

A reduced dynamical model describing temperature stratification effects driven by natural convection in a liquid hydrogen cryogenic fuel tank has been developed. It accounts for ...

Removing Spikes While Preserving Data and Noise using Wavelet Filter Banks

A Publication, Prognostics CoE Publications - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 - 10 years, 11 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 ...