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Federal
A multi-feature integration method for fatigue crack detection and crack length estimation in riveted lap joints using Lamb waves
National Aeronautics and Space Administration —
This paper presents an experimental study of damage detection and quantification in riveted lap joints. Embedded lead zirconate titanate piezoelectric (PZT) ceramic... -
Federal
An Energy-Based Prognostic Framework to Predict Fatigue Damage Evolution in Composites
National Aeronautics and Space Administration —
In this work, a prognostics framework to predict the evolution of damage in fiber-reinforced composites materials under fatigue loads is proposed. The assessment of... -
Federal
Automated Contingency Management for Propulsion Systems
National Aeronautics and Space Administration —
Increasing demand for improved reliability and survivability of mission-critical systems is driving the development of health monitoring and Automated Contingency... -
Federal
Probabilistic Delamination Diagnosis of Composite Materials Using a Novel Bayesian Imaging Method
National Aeronautics and Space Administration —
In this paper, a probabilistic delamination location and size detection framework is proposed. The delamination probability image using Lamb wave-based damage... -
Federal
Evaluating the Impact of Unrestricted Operation of Unmanned Aircraft Systems in the National Airspace System
National Aeronautics and Space Administration —
Unmanned aircraft systems (UAS) can be used for scientific, emergency management, and defense missions, among others. The existing federal air regulations,... -
Federal
Simulation-based Design and Validation of Automated Contingency Management for Propulsion Systems
National Aeronautics and Space Administration —
This paper introduces a novel Prognostics-enhanced Automated Contingency Management (or ACM+P) paradigm based on both current health state (diagnosis) and future... -
Federal
Fatigue Damage Prognosis in FRP Composites by Combining Multi-Scale Degradation Fault Modes in an Uncertainty Bayesian Framework
National Aeronautics and Space Administration —
In this work, a framework for the estimation of the fatigue damage propagation in CFRP composites is proposed. Macro-scale phenomena such as stiffness and strength... -
Federal
Developing IVHM Requirements for Aerospace Systems
National Aeronautics and Space Administration —
The term Integrated Vehicle Health Management (IVHM) describes a set of capabilities that enable sustainable and safe operation of components and subsystems within... -
Federal
Towards Requirements in Systems Engineering for Aerospace IVHM Design
National Aeronautics and Space Administration —
Health management (HM) technologies have been employed for safety critical system for decades, but a coherent systematic process to integrate HM into the system...