scholarly journals Smart Tightening Development for Aeronautical Bolted Assemblies in an Industry 4.0

2021 ◽  
pp. 419-425
Author(s):  
Charly Foissac ◽  
Alain Daidie ◽  
Stephane Segonds ◽  
Clément Chirol
Keyword(s):  
Manufacturing Process ◽  
Industry 4.0 ◽  
Test Bench ◽  
Experimental Tests ◽  
Process Quality ◽  
Improve Performance ◽  
Maintenance And Repair ◽  
Aircraft Manufacturing ◽  
Major Interest

AbstractSmart tightening development is part of the Industry 4.0 transformation with the introduction of smart tools, and preload in bolted assemblies is of major interest in today’s aircraft manufacturing process. So far, it has been difficult to estimate the importance of each parameter for tightening process quality, mainly because of the large number of combinations and configurations that exist.The present work aims at evaluating the effects and the interactions between different parameters that have to be taken in consideration in future torquing strategy. Many experimental tests have been conducted on an Automatica test bench using a Taguchi strategy and an analysis of the first main results is now presented, highlighting the complexity of the phenomena studied.All these points will help us to better understand tightening, so as to improve performance during installation, maintenance and repair.

Analysis of the thermal variations in a moving pantograph strip using an electro-thermal simulation tool and validating by experimental tests

2019 ◽  
Vol 234 (8) ◽  
pp. 859-868
Author(s):  
Nicolas Delcey ◽  
Philippe Baucour ◽  
Didier Chamagne ◽  
Geneviève Wimmer ◽  
Giuseppe Bucca ◽  
...  
Keyword(s):  
Test Bench ◽  
Electrical Power ◽  
Computation Time ◽  
Experimental Tests ◽  
Simulation Tool ◽  
Heat Sources ◽  
Train Operation ◽  
Catenary System ◽  
Experimental Values ◽  
Physical Phenomena

The performance of the pantograph–catenary system is very significant in supplying reliable electrical power for the operation of trains. Many problems arise due to the increase in temperature inside the pantograph strip. More research works have been done to study the temperature extrema of the system but it is quite difficult to obtain the experimental values during a real-time train operation. Moreover, performing experimental tests needs a representative test bench of the system or a real train. This is challenging owing to the time and availability of materials and taking into account the number of physical phenomena to control and measure. To address this problem, the authors of this study present an electro-thermal modeling tool. The heat sources which characterize the system are analyzed to generate a heat equation formulation. This equation is solved with the finite differences numerical method in order to obtain the temperature distribution in the pantograph strip. In addition, some specifications such as computation time or required memory are taken into account. More precisely, mathematical and numerical optimizations are proposed to improve these specifications. The tool is validated by comparing the simulated results with the experimental tests obtained from a test bench located at POLIMI (Polytechnico Di Milano, Milan). Finally, thermal interpretations as well as relative gap analyses are done in different situations.

Process Management of Aircraft Manufacturing Based on Single Enterprise BOM

2013 ◽  
Vol 394 ◽  
pp. 222-227
Author(s):  
Zhou Yang Li ◽  
Yan Ni Lei
Keyword(s):  
Manufacturing Process ◽  
Process Management ◽  
Prototype System ◽  
Data Mapping ◽  
Manufacturing Enterprises ◽  
Management Platform ◽  
Whole Process ◽  
Aircraft Manufacturing ◽  
Manufacturing Process Management ◽  
Mass Information

nformation exchange and sharing are difficult in manufacturing process for manufacturing enterprises, especially for aircraft manufacturing enterprises, which have complex product to fabricate and mass information to handle. To solve this problem, a Single Enterprise BOM (SEBOM) based Aircraft Manufacturing Process Management System (AMPMS) is promoted to support the whole process of aircraft manufacturing, based on the analysis of aircraft manufacturing process and the process of data flowing. In AMPMS, in order to satisfy the information requirement, a SEBOM is established by unifying various BOM data. A unified SEBOM management platform is established to managing distributed and heterogeneous SEBOM data. Furthermore, the key technologies including BOM data mapping and BOM data agent management are discussed in detail. The validity and feasibility of AMPMS system are verified by developing a prototype system.

Optimal Configuration Selection Through Experimental Tests on Branched Heat Exchanger With R134 Organic Fluid

2019 ◽  
Author(s):  
Roberto Capata ◽  
Alfonso Calabria
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
Test Bench ◽  
Experimental Tests ◽  
Constructal Theory ◽  
Detailed Knowledge ◽  
Nusselt Numbers ◽  
Configuration Selection ◽  
Efflux Velocity ◽  
Made In

Abstract The aim of this work the analysis of compact branched heat exchangers, by measuring thermal efficiency and the pressure drop in several experimental tests. Three different heat exchanger configuration have been considered. In the first device, the constant efflux velocity, in the internal channels, was imposed. The second exchanger was realized by imposing constant the value of the Reynolds number. The last device was created according to the instructions of the constructal theory. All three exchangers are aluminum made. In addition, in order to have a more detailed knowledge of the phenomenon and to identify what are the parameters that govern heat transfer, an organic fluid has been used and tested. In our case R1234 organic fluid. It was therefore necessary to realize an appropriate test bench for the use of the organic fluid. Once realized, several tests were conducted. Finally in order to be able to indicate which configuration results the optimal one, the Prandtl and Nusselt numbers were obtained and compared.

Effects of Bicarbonate, Citrate, and Phosphate Loading on Performance

1995 ◽  
Vol 5 (s1) ◽  
pp. S111-S119 ◽  
Author(s):  
Craig A. Horswill
Keyword(s):  
Energy Production ◽  
Force Production ◽  
Hydrogen Ions ◽  
Intense Exercise ◽  
Improve Performance ◽  
Repeated Sprints ◽  
Gastrointestinal Distress ◽  
Major Interest ◽  
Phosphate Loading ◽  
Phosphate Salts

Since the 1930s, scientists have attempted to determine if increasing the body’s ability to buffer metabolic acids will enhance physical performance. The buffer of major interest has been bicarbonate; to a lesser degree, citrate and phosphate salts have been investigated. In theory, the buffers facilitate performance by decreasing the accumulation of hydrogen ions that would otherwise presumably inhibit glycolysis and interfere with energy production or impair cross-bridge formation between myofilaments and thereby reduce force production. Literature findings indicate variable results, but overall it appears that bicarbonate salts taken at dosages of 0.3 g · kg−1 may improve performance during repeated sprints or at the end of a progressively more intense exercise test. Athletes are advised of potential ill effects of bicarbonate ingestion, such as gastrointestinal distress. Prior to applying the agents in a competitive setting, athletes should test the effects of buffers on performance during training sessions and consider the sport governing body’s stand on buffer usage.

scholarly journals Excitation device for high frequency vibration analysis: Design and test results

2017 ◽  
Vol 24 (19) ◽  
pp. 4620-4629 ◽  
Author(s):  
Paolo Neri
Keyword(s):  
High Frequency ◽  
Test Bench ◽  
Experimental Tests ◽  
Wide Frequency Range ◽  
Response Analysis ◽  
Design And Optimization ◽  
Vibrational Response ◽  
High Frequency Excitation ◽  
Frequency Excitation ◽  
Harmonic Response Analysis

In the present paper, the design and optimization of a high frequency excitation source is presented. The device was developed for a harmonic response analysis test bench, aimed at dynamic characterization and resonance prediction of mechanical structures. A wide frequency range must be covered, depending on the analyzed structure: the range 1–10 kHz was considered in the present work. The device was designed for a test bench aimed at investigating the vibrational response of centrifugal compressor bladed wheels. A really compact solution was needed since the final test bench provides one exciter for each blade (up to 20 devices on the circumference hoop). Both contact and contactless solutions were considered, but only the contact solution was found to fulfill all the specifications. Finally, different stinger solutions were proposed and compared in the paper. The investigated solutions were: a beam stinger (diameter 1 mm); a wire stinger (diameter 0.2 mm); and a ball stinger (diameter 3 mm) with two different support solutions. Experimental tests performed on a device prototype allowed to verify the specifications fulfillment and to choose the best stinger solution for the application.

scholarly journals Highlighting the benefits of Industry 4.0 for production: an agent-based simulation approach

2020 ◽  
Vol 27 (3) ◽  
Author(s):  
Julio Takashi Cavata ◽  
Alexandre Augusto Massote ◽  
Rodrigo Filev Maia ◽  
Fábio Lima
Keyword(s):  
Manufacturing Process ◽  
Industry 4.0 ◽  
Simulation Method ◽  
Production Performance ◽  
Time Interval ◽  
Advanced Manufacturing ◽  
Agent Based Simulation ◽  
Agent Based ◽  
Manufacturing Simulation ◽  
Traditional Manufacturing

Abstract: Advanced Manufacturing or Industry 4.0 concepts bring new advances and challenges to current industrial processes. Such concepts are not always well understood and their results in terms of production performance may not be clear. This work proposes a comparison between a traditional manufacturing process and an advanced manufacturing process, both modelled by a multiagent society. In the traditional manufacturing simulation, the agents follow the defined times of each process, including the maintenance times. In the advanced manufacturing simulation, the decision about when to stop a piece of equipment for maintenance is defined by the agent according to data received from sensors and the definitions of the process. The results indicate a significant improvement in equipment usage and consequently higher production in the same time interval. The process simulation clearly indicates that the application of advanced manufacturing concepts in industry is relevant in order to increase the efficiency of production processes. Among the main concepts introduced in advanced manufacturing models are the Internet of Things (IoT), Cyber-Physical Systems (CPSs), and Artificial Intelligence (AI). The models generated are computationally simulated using an agent-based simulation method from the software AnyLogic. The results obtained should contribute to encouraging small and medium sized enterprises to adopt the concepts of Industry 4.0 in their businesses.

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