Search results for "TRAS"

showing 10 items of 11623 documents

Ultrasonic Welding of PBT-GF30 (70% Polybutylene Terephthalate + 30% Fiber Glass) and Expanded Polytetrafluoroethylene (e-PTFE)

2021

The ultrasonic welding of polymeric materials is one of the methods often used in practice. However, each couple of material subjected to ultrasonic welding is characterized by different values of technological parameters. Therefore, the main objective of the research presented in this paper is to optimize the parameters for the ultrasonic welding of two materials, namely PBT-GF30 (70% polybutylene terephthalate + 30% fiber glass) and expanded polytetrafluoroethylene (e-PTFE). In this sense, the research was carried out considering a plate-type part made of PBT-GF30, which had a thickness of 2.1 mm, and a membrane-type part made of e-PTFE, with a thickness of 0.3 mm. The condition imposed o…

0209 industrial biotechnologyMaterials sciencePolymers and PlasticsBar (music)PBT-GF30 (70% polybutylene terephthalate + 30% fiber glass)02 engineering and technologyExpanded polytetrafluoroethyleneWeldingArticleultrasonic weldinglaw.inventionlcsh:QD241-441chemistry.chemical_compound020901 industrial engineering & automationlcsh:Organic chemistrylawparameter optimizationComposite materialHolding timeUltrasonic weldingFiber glassGeneral Chemistry021001 nanoscience & nanotechnologyPolybutylene terephthalatechemistry0210 nano-technologyexpanded polytetrafluoroethylene (e-PTFE)Layer (electronics)Polymers

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Assembly Process Modeling Through Long Short-Term Memory

2021

This paper studies Long Short-Term Memory as a component of an adaptive assembly assistance system suggesting the next manufacturing step. The final goal is an assistive system able to help the inexperienced workers in their training stage or even experienced workers who prefer such support in their manufacturing activity. In contrast with the earlier analyzed context-based techniques, Long Short-Term Memory can be applied in unknown scenarios. The evaluation was performed on the data collected previously in an experiment with 68 participants assembling as target product a customizable modular tablet. We are interested in identifying the most accurate method of next assembly step prediction…

0209 industrial biotechnologyProcess modelingComputer sciencebusiness.industryContrast (statistics)Context (language use)02 engineering and technologyModular designMachine learningcomputer.software_genreLong short term memory020901 industrial engineering & automationComponent (UML)0202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processingArtificial intelligencebusinesscomputer

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Fast ultrasonic phased array inspection of complex geometries delivered through robotic manipulators and high speed data acquisition instrumentation

2016

Performance of modern robotic manipulators has enabled research and development of fast automated non-destructive testing (NDT) systems for complex geometries. This paper presents recent outcomes of work aimed at removing the bottleneck due to data acquisition rates, to fully exploit the scanning speed of modern 6-DoF manipulators. State of the art ultrasonic instrumentation has been integrated into a large robot cell to enable fast data acquisition, high scan resolutions and accurate positional encoding. A fibre optic connection between the ultrasonic instrument and the server computer enables data transfer rates up to 1.6GB/s. Multiple data collection methods are compared. Performance of …