A probabilistic physics-of-failure model for prognostic health management of structures subject to pitting and corrosion-fatigue

2011 ◽  
Vol 96 (12) ◽  
pp. 1601-1610 ◽  
Author(s):  
M. Chookah ◽  
M. Nuhi ◽  
M. Modarres
Keyword(s):  
Corrosion Fatigue ◽  
Health Management ◽  
Failure Model ◽  
Physics Of Failure ◽  
Prognostic Health Management

scholarly journals Prognostics and health management technology for radar system

2020 ◽  
Vol 309 ◽  
pp. 04009
Author(s):  
Yongle Lyu ◽  
Zhuo Pang ◽  
Chuang Zhou ◽  
Peng Zhao
Keyword(s):  
Model Building ◽  
Health Management ◽  
Radar System ◽  
Prognostics And Health Management ◽  
Failure Model ◽  
Long Distance ◽  
Maintenance System ◽  
Management Technology ◽  
Key Techniques ◽  
Selection Of

Information-based war in the future has a higher requirement to the maintenance and support ability of radar system. Prognostics and Health Management(PHM) technology represents the research hotspot of maintenance system, and following key techniques need to be resolved to research on the radar PHM technology such as the acquirement and selection of health information and fault signs of a radar’s electronical components, mass data warehousing and mining, fusion of multi-source test data and multi-field characteristic information, failure model building and forecasting, automatic decision-making on maintenance, and at the same time improving the self built-in test abilities of radar’s components based on the optimization of Design For Testability(DFT). The radar PHM technology has the trend of “built-in to integrate”, “together with DFT” and “long-distance and distributed”. However, subjected to radar’s complexity and current PHM technique level, radar PHM engineering still meets many challenges, but has bright future.

A Physics of Failure Approach to Component Placement

1992 ◽  
Vol 114 (3) ◽  
pp. 305-309 ◽  
Author(s):  
M. D. Osterman
Keyword(s):  
Operating Temperature ◽  
Threshold Temperature ◽  
Time To Failure ◽  
Failure Model ◽  
Physics Of Failure ◽  
Component Placement ◽  
Convection Cooling ◽  
The Individual ◽  
Component Temperature ◽  
Cycles To Failure

Traditionally, placement techniques have focused on improving rotability based on minimizing the total wire length between interconnected components. However, electronic card assembly (ECA) reliability, which is measured in terms of time to failure, cycles to failure, or the hazard rates of the individual components, the interconnections, and the PWB, is also affected by component placement. This paper discusses component placement for reliability based on a failure model which incorporates component temperature, a base operating temperature, a threshold temperature, and change in temperature. Placement procedures are developed so as to minimize the time to failure or the total hazard rate of the components on a PWB utilizing a forced convection cooling.

Parameters Evaluation for Aero-Engine Prognostic Health Management

2012 ◽  
Vol 236-237 ◽  
pp. 192-196
Author(s):  
Fang Bai ◽  
Wen Li Jin
Keyword(s):  
Calculation Method ◽  
Health Management ◽  
Remaining Life ◽  
Gas Temperature ◽  
Aero Engine ◽  
Prognostic Health Management

Prognostic health-management of aero-engine’s fleet have features with multi-source and asynchronous. Cruise engine gas temperature (EGT) and Take-off EGT have always been the focus of evaluating gas performance and predicting the remaining life. The calculation method of EGT Margin was showed based on the introduction of the definition and classification of the EGT. It analyses not only the relationships between Cruise EGT and Take-off EGT but also each other’s main functions. Meanwhile, an instance was used to explain the disadvantages of using Cruise EGT to calculate life prognostics.

scholarly journals Corrosion Monitoring of Aircraft Based on the Corrosion Prognostic Health Management (CPHM) System

2020 ◽  
Vol 50 (4) ◽  
pp. 205-216
Author(s):  
Patryk Ciężak ◽  
Adam Rdzanek
Keyword(s):  
Damage Tolerance ◽  
Health Management ◽  
Actual State ◽  
Corrosion Monitoring ◽  
Field Site ◽  
Aircraft Structure ◽  
Corrosion Detection ◽  
Preliminary Results ◽  
Forecasting Methods ◽  
Prognostic Health Management

AbstractThe article presents methods to monitor the actual state of aircraft’s airframe, in particular, the onset of corrosion. The greatest emphasis is put on the “Corrosion Prognostic Health Management” CPHM system. Authors discuss corrosion detection using NDT methods as well as the possibilities of forecasting methods for estimating the onset of corrosion basing on the data gathered by means corrosion sensors. Based on the results of the previous research and analyses, authors focus on monitoring the internal microclimate and the factors causing corrosion in the aspect of damage tolerance operation of the aircraft. The results of the preliminary studies giving credibility to the concepts of predicting corrosion onset in the aircraft structure are presented. Preliminary results of tests carried out in supervised flights are also presented. The final part of the article presents the concept of modernizing the corrosion field site in order to use it in hermetic and non-hermetic tests of aircraft spaces.

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