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In order to develop an Automatic Pesticide Detection System an electronic nose based on an array of commercial gas sensors has been realized. The sensors works in parallel and a qualitative response to different pesticides has been found through the use of a self-made measurement bench.
This paper examines the obsolescence of the “Reliability Prediction of Electronic Equipment” handbook (MIL-HDBK-217) under both technical and operative points of view, evaluating its strengths and its weaknesses. Practically the handbook is no more applicable, so it is necessary to trace the philosophy for a new method that overcomes the '217 problems: new scenarios for the reliability calculation...
Recent developments in the Logistic Engineering field are expanding the range of analysis for Operational Availability (Ao) from purely statistical models to include prognostic models. A necessary step in order to perform prognostic analysis is the study of system's components degradations. The degradation of a component is a case by case study, which characteristics that change significantly even...
Through the concept of the “physics of failure,” this article analyzes a possible extension of the modern Logistic Support Analysis (LSA) databases such as ASD S3000L in order to support a new view of operational availability based on the categorization of stresses obtained by operational scenarios and applicable to FMMEA (Failure Mode Mechanism Effect Analysis). In order to integrate such methodologies...
In this work we present an investigation on a conductive thermoplastic nanocomposite used as flexible and stretchable strain gauge to be applied on inflatable structures for both terrestrial and extra-terrestrial applications. In particular we analysed the sensor behaviour by using an one-dimensional expansion system for increasing strain up to 5% and we studied the device changing in temperature...
A measurement system able to extract the envelop of signals coming from electrical motors has been presented. The system use a tri-axial accelerometer mounted on an electrical motor used on small Unmanned Aerial Vehicles to made a vibrational analysis. The aim of this paper is to show the first part of this system based on the Envelope Analysis that, with the support of a database and a comparison...
After the description of FMECA methodology applied to vulnerability evaluations typically in electronic context, an its use is suggested for powerline in case of earthquakes. The procedure gives a series of quantification risk tables which correctly filled give the indication of the probability risk for each harm of the electric network becoming an useful instrument to preventively fix where primarily...
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