An Event-based Distributed Diagnosis Framework using Structural Model Decomposition

A Publication, Prognostics CoE Publications - 9 years, 8 months ago

Shared By: Matthew Daigle

Complex engineering systems require efficient on-line fault diagnosis methodologies to improve safety and reduce maintenance costs. Traditionally, diagnosis approaches are centralized, but these solutions do ...

Distributed Prognostics Based on Structural Model Decomposition

A Publication, Prognostics CoE Publications - 9 years, 8 months ago

Shared By: Matthew Daigle

Within systems health management, prognostics focuses on predicting the remaining useful life of a system. In the model-based prognostics paradigm, physics-based models are constructed that ...

Improving Multiple Fault Diagnosability using Possible Conflicts

A Publication, Prognostics CoE Publications - 10 years, 3 months ago

Shared By: Matthew Daigle

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 ...

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

A Publication, Prognostics CoE Publications - 10 years, 3 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, 3 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, 3 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, 3 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, 3 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, 3 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 ...