Entropy-based probabilistic fatigue damage prognosis and algorithmic performance comparison

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

Shared By: Miryam Strautkalns

In this paper, a maximum entropy-based general framework for probabilistic fatigue damage prognosis is investigated. The proposed methodology is based on an underlying physics-based crack ...

Evaluating Algorithm Performance Metrics Tailored for Prognostics

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

Shared By: Miryam Strautkalns

Prognostics has taken center stage in Condition Based Maintenance (CBM) where it is desired to estimate Remaining Useful Life (RUL) of a system so that ...

Metrics for Evaluating Performance of Prognostic Techniques

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

Shared By: Miryam Strautkalns

Prognostics is an emerging concept in condition basedmaintenance(CBM)ofcriticalsystems.Alongwith developing the fundamentals of being able to confidently predict Remaining Useful Life (RUL), the technology calls for ...

Modeling Propagation of Gas Path Damage

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

Shared By: Miryam Strautkalns

This paper describes how damage propagation can be tracked and modeled for a range of fault modes in some modules of commercial high bypass aircraft ...

Model-based Diagnostics for Propellant Loading Systems

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

Shared By: Miryam Strautkalns

The loading of spacecraft propellants is a complex, risky operation. Therefore, diagnostic solutions are neces- sary to quickly identify when a fault occurs, so that ...

Distributed Damage Estimation for Prognostics based on Structural Model Decomposition

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

Shared By: Miryam Strautkalns

Model-based prognostics approaches capture system knowl- edge in the form of physics-based models of components that include how they fail. These methods consist of a ...

Improving Distributed Diagnosis Through Structural Model Decomposition

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

Shared By: Miryam Strautkalns

Complex engineering systems require efficient fault diagnosis methodologies, but centralized ap- proaches do not scale well, and this motivates the development of distributed solutions. This ...

Qualitative Event-based Diagnosis with Possible Conflicts: Case Study on the Third International Diagnostic Competition

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

Shared By: Miryam Strautkalns

We describe two model-based diagnosis algo- rithms entered into the Third International Diag- nostic Competition. We focus on the first diag- nostic problem of the ...

Third International Diagnostic Competition

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

Shared By: Miryam Strautkalns

We present the third implementation of a framework created jointly by NASA Ames Research Center, Palo Alto Research Center, and Delft University of Technology to ...

An Integrated Model-Based Distributed Diagnosis and Prognosis Framework

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

Shared By: Miryam Strautkalns

Diagnosis and prognosis are necessary tasks for system reconfiguration and fault-adaptive control in complex systems. Diagnosis consists of detec- tion, isolation and identification of faults, ...

Qualitative Event-based Diagnosis with Possible Conflicts Applied to Spacecraft Power Distribution Systems

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

Shared By: Miryam Strautkalns

Model-based diagnosis enables efficient and safe operation of engineered systems. In this paper, we describe two algorithms based on a qualitative event-based fault isolation framework ...

Improving Multiple Fault Diagnosability using Possible Conflicts

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

Shared By: Miryam Strautkalns

Multiple fault diagnosis is a difficult problem for dynamic systems. Due to fault masking, compensation, and relative time of fault occurrence, multiple faults can manifest ...

An Integrated Framework for Model-Based Distributed Diagnosis and Prognosis

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

Shared By: Miryam Strautkalns

Diagnosis and prognosis are necessary tasks for system re- configuration and fault-adaptive control in complex systems. Diagnosis consists of detection, isolation and identification of faults, ...

A Distributed Approach to System-Level Prognostics

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

Shared By: Miryam Strautkalns

Prognostics, which deals with predicting remaining useful life of components, subsystems, and systems, is a key tech- nology for systems health management that leads to ...