Maintenance and Aftermarket

Prognostics

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Application Briefs: Test & Measurement
Predictive maintenance is poised to become much more widely adopted, and that will help to boost productivity in a time when we really need it.
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Briefs: Electronics & Computers
NASA has developed a method that prevents total system failure during emergencies, allowing parts of the system to continue to function, and making overall system recovery faster. A heterogeneous set of...
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Application Briefs: Sensors/Data Acquisition
Ridgetop Group has been selected for a Small Business Innovation Research (SBIR) contract from NASA. Under the agreement, Ridgetop will develop an advanced system that mitigates faults...
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Briefs: Electronics & Computers
Distributed Prognostics and Health Management With a Wireless Network Architecture
A heterogeneous set of system components monitored by a varied suite of sensors and a particle-filtering (PF) framework, with the power and the flexibility to adapt to the different diagnostic and prognostic needs, has been developed. Both the diagnostic and...
Briefs: Physical Sciences
Multi-Dimensional Damage Detection for Surfaces and Structures
Current designs for inflatable or semirigidized structures for habitats and space applications use a multiple-layer construction, alternating thin layers with thicker, stronger layers, which produces a layered composite structure that is much better at resisting damage. Even though such...
Briefs: Information Technology
Generalized Approach to Prognosis for an Engineering System
This new generalized approach to prognostics can provide an automated early failure prediction of an engineering system or its components, often in time to prevent occurrence of hard failures. This approach has been demonstrated in a proof-of-concept software prototype, shown to accurately...
Briefs: Software
A computer program implements the algorithm described in "Hypothetical Scenario Generator for Fault-Tolerant Diagnosis" (NPO-42516), NASA Tech Briefs, Vol. 31, No. 6 (June 2007), page 71. To...
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Briefs: Information Technology
Equations for Scoring Rules When Data Are Missing
A document presents equations for scoring rules in a diagnostic and/or prognostic artificial-intelligence software system of the rule-based inference- engine type. The equations define a set of metrics that characterize the evaluation of a rule when data required for the antecedence clause(s) of the...
Briefs: Software
Diagnosis and Prognosis of Weapon Systems
The Prognostics Framework is a set of software tools with an open architecture that affords a capability to integrate various prognostic software mechanisms and to provide information for operational and battlefield decision-making and logistical planning pertaining to weapon systems. The Prognostics...
Briefs: Electronics & Computers
Fatigue cracks and plastic deformation of parts in jet aircraft engines could be detected, even during engine operation, by use of proposed in situ monitoring devices called "wireless...
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