Wyniki wyszukiwania - BazTech

1

Real-time operational load monitoring of a composite aerostructure using FPGA-based computing system

Mucha Waldemar

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2024

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Vol. 72, nr 1

art. no. e148251

EN

Operational load monitoring (OLM) is an industrial process related to structural health monitoring, where fatigue of the structure is tracked. Artificial intelligence methods, such as artificial neural networks (ANNs) or Gaussian processes, are utilized to improve efficiency of such processes. This paper focuses on moving such processes towards green computing by deploying and executing the algorithm on low-power consumption FPGA where high-throughput and truly parallel computations can be performed. In the following paper, the OLM process of typical aerostructure (hat-stiffened composite panel) is performed using ANN. The ANN was trained using numerically generated data, of every possible load case, to be working with sensor measurements as inputs. The trained ANN was deployed to Xilinx Artix-7 A100T FPGA of a real-time microcontroller. By executing the ANN on FPGA (where every neuron of a given layer can be processed at the same time, without limiting the number of parallel threads), computation time could be reduced by 70% as compared to standard CPU execution. Series of real-time experiments were performed that have proven the efficiency and high accuracy of the developed FPGA-based algorithm. Adjusting the ANN algorithm to FPGA requirements takes some effort, however it can lead to high performance increase. FPGA has the advantages of many more potential parallel threads than a standard CPU and much lower consumption than a GPU. This is particularly important taking into account potential embedded and remote applications, such as widely performed monitoring of airplane structures.

2

Effect of Process Parameters on Microstructure and Mechanical Properties of RFSSW Lap Joints of Thin Al7075-T6 Sheets

Andres J., Wrońska A., Gałaczyński T., Luty G., Burek R.

Archives of Metallurgy and Materials

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2018

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Vol. 63, iss. 1

39--43

EN

Refill friction stir spot welding (RFSSW) is a new technique of metal structures joining. Within the framework of activities of PZL Mielec in R&D area (program Innolot) researches are realized which aim is to develop the RFSSW technology as a method of joining thin aluminum elements used in aircrafts constructions. The paper presents results of investigations on the RFSSW lap joints welded using rotations in the range from 1500 to 2000 rpm and tool sleeve plunge depth from 1.6 to 1.8 mm. Thin aluminum sheets of thickness 0.8 and 1.6 mm coated with alclad or anodized were welded. Results of the investigations prove that the most common cause of specimens breaking was presence of geometrical defect – the so called hook and weak bonding between parent material and working area of internal sleeve of RFSSW tool. The best tensile strength was reached in case of joint welded at rotational speed 2000 rpm and tool plunge depth 1.6 mm and 1.7 mm (5.37 kN and 5.87 kN adequately). These joints were characterized by very fine and uniform microstructure in the area between sleeve stirred zone and parent material.

3

Automated fiber placement systems overview

Kozaczuk K.

Prace Instytutu Lotnictwa

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2016

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Nr 4 (245)

52--59

EN

This paper presents research results in the field of Automated Fiber Placement (AFP) systems dedicated for composite aerostructures manufacturing. The currently available AFP systems are reviewed with the aim to evaluate importance parameters of this technology. In the scope of this work automatic fiber placement method is presented. Systems with various architectures, from small till industrial application, are described and supported by examples of incorporating that method by aviation industry. Typical materials dedicated for AFP technology are presented. The advantages and limitations of various system configurations in terms of parts size, parts shape and composite materials are discussed. The economic aspect of this technology is also presented with comparison to traditional hand layup technology.

PL

W artykule przedstawiono wyniki analizy w zakresie Zrobotyzowanych Systemów Układania Taśm Kompozytowych dedykowanych do produkcji kompozytowych struktur lotniczych. Zaprezentowano podstawy technologii układania taśm kompozytowych, przeanalizowano dostępne obecnie systemy w zakresie istotnych parametrów technologicznych. Przedstawiono architekturę współczesnych systemów układania taśm, rozpoczynając od niewielkich urządzeń przystosowanych do prac badawczo rozwojowych aż do dużych urządzeń przemysłowych. Opisano i poparto przykładami wprowadzenie tej metody do przemysłu lotniczego. Zaprezentowano typowe materiały przeznaczone dla technologii Zrobotyzowanego Układania Taśm Kompozytowych. Przedstawiono zalety i ograniczenia różnych konfiguracjach systemów pod względem wielkości wytwarzanych części, ich kształtu oraz używanych materiałów kompozytowych. Omówiono ekonomiczny aspekt użycia tej technologii w odniesieniu do tradycyjnej technologii ręcznego układania preimpregnatów kompozytowych.

4

System deskowań Hunnebeck w ciągu autostrady A1

Adamczyk S.

Nowoczesne Budownictwo Inżynieryjne

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2009

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Nr 3

32-33

PL

W artykule przedstawiono działalność firmy Hunnebeck Polska. Firma ta specjalizuje się w systemach deskowań i rusztowań.

5

Badania stanu degradacji ustroju nośnego ładowarko-zwałowarki ŁZKS 500

Szepietowski W., Onichimiuk M., Wygoda M.

Górnictwo Odkrywkowe

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2003

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R. 45, nr 2-3

65-68

PL

Przedstawienie wyniki badań stopnia degradacji ustroju nośnego ładowarko-zwałowarki ŁZKS 500, pracującej przez blisko 30 lat na składowisku węgla kamiennego w Elektrowni Kozienice. Badania obejmowały ocenę wizualna ustroju i badania defektoskopowe ultradźwiękowe wybranych węzłów ustroju; w tym również pomiary ubytków korozyjnych w prętach o skomplikowanym kształcie przekroju.

EN

Wheel stacker-reclaimers working on coal stacking yards are long-lived machines. Over the years of operations, machine load carrying structure is gradually degraded. Paper presents results of technical condition examinations of steel load currying structure of ŁZKA 500 stacker-reclaimer, working over 30 years on coal stacking yard in Kozienice Power Plant. The first stage of investigations included visual examinations of carrying structure. In the second phase, flaw tests were performed at selected places of carrying structure having critical meaning for machine safety and those, which condition brought attention during visual inspection. Load carrying structure was showing sings of considerable corrosion damages, especially in bucket wheel jib. The largest corrosive losses occurred in places of coal dirt accumulation. Ultrasonic test showed that steel wall thickness in rods (and closed profiles) of bucket wheel jib had locally over 50% of corrosive losses. However, inspection did not reval any fatigue damages. Only one teat in welded connection was found in a tower of load carrying structure and had character of immediate steel scrap. Ultrasonic flaw test showed that one bolt, in connection of bucket wheel jib to tower, is showing a small internal defect that might occurred during production process. In remaining tested places no defects were found. According to general assessment of stell load carrying structure was due to repair and after its completition machine could be back in operation.

6

Composite joints of aerostructures

Dębski D. K., Dębski M. A., Gołoś K. M.

Prace Instytutu Lotnictwa

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2002

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z. 3-4 (170-171)

3-27

EN

The paper presents the idea and also static tensile tests and fatigue tests of composite node joints of load-bearing structures. The innovative idea of joints of composite construction is an alternative solution for classical concept of the node joint. Results of tests are very promising. It has been suggested that presented idea of composite node joint could be applied to use in more complex structures. Composite node joints with kevlar, glass and carbon component has been tested. This idea is patented.

PL

W pracy przedstawiono badania wytrzymałości statycznej i zmęczeniowej jednego z wielu możliwych rozwiązań węzłów kompozytowych, wiążących elementy stanowiące strukturę nośną konstrukcji. Przedstawiona koncepcja jest alternatywną propozycją dla klasycznych rozwiązań połączeń. Badaniom poddano węzły kompozytowe ze wzmocnieniem wykonanym z włókien (rovingów): szklanych, kevlarowych i węglowych.