Simulation-based layout optimization for multi-station assembly lines

AbstractThis article presents a novel approach for the automated 3D-layout planning of multi-station assembly lines. The planning method is based on a comprehensive model of the used production resources, including their geometry, kinematic properties, and general characteristics. Different resource types can be included in the planning system. A genetic algorithm generates and optimizes possible layouts for a line. The optimization aims to minimize the line’s area and the costs for assembling the line while simultaneously optimizing the resources’ positioning to perform their tasks. The line’s cycle time is considered as a boundary condition. For the evaluation of different layout alternatives, a multi-body simulation is performed. A parameter study is used to set the algorithm’s parameters. Afterward, the algorithm is applied to three increasingly complex examples to validate and evaluate its functionality. The approach is promising for industrial applications as it allows the integration of various resource types and individualization of the optimization function.

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CATRASYS (Cassino Tracking System): A Wire System for Experimental Evaluation of Robot Workspace

Journal of Robotics and Mechatronics ◽

10.20965/jrm.2002.p0078 ◽

2002 ◽

Vol 14 (1) ◽

pp. 78-87 ◽

Cited By ~ 33

Author(s):

Erika Ottaviano ◽

◽

Marco Ceccarelli ◽

Maria Toti ◽

Carolina Avila Carrasco

Keyword(s):

Experimental Evaluation ◽

Tracking System ◽

Measuring Error ◽

Practical Application ◽

System A ◽

Novel Approach ◽

Basic Performance ◽

Multi Body ◽

Wire System

In this paper we present the design and operation of CATRASYS (Cassino Tracking System), a wire tracking system which has been designed and built at the Laboratory of Robotics and Mechatronics in Cassino. CATRASYS is capable of measuring large displacements and orientation variations of complex movable multi-body systems. The measuring principle is based on trilateration technique, which has been properly formulated for an easy use of CATRASYS. The basic performance and feasibility of CATRASYS have been checked through an error analysis and experimental results. In particular, a suitable novel approach for the determination of the measuring error is presented in this paper and examples are reported. Workspace evaluation of industrial type robots is presented and discussed as a practical application of CATRASYS: it can be considered as a novel experimental evaluation of workspace performances of robots.

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Novel Approach of Improving Secondary Electron Detector in FIB System

10.31399/asm.cp.istfa2018p0206 ◽

2018 ◽

Author(s):

Steve Wang ◽

Jim McGinn ◽

Peter Tvarozek ◽

Amir Weiss

Keyword(s):

Integrated Circuit ◽

Secondary Electron ◽

Focused Ion Beam ◽

Ion Beam ◽

Vital Role ◽

Electron Detector ◽

System A ◽

Novel Approach

Abstract Secondary electron detector (SED) plays a vital role in a focused ion beam (FIB) system. A successful circuit edit requires a good effective detector. Novel approach is presented in this paper to improve the performance of such a detector, making circuit altering for the most advanced integrated circuit (IC) possible.

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INVESTMENT ACTIVITY AS ONE OF THE FACTORS OF ECONOMY DEVELOPMENT

Education and Science without Limits: Fundamental and Applied Researches - Актуальные аспекты фундаментальных и прикладных исследований ◽

10.36683/2500-249x-2019-10-25-31 ◽

2019 ◽

pp. 25-31

Author(s):

A.V. Korchemnaya

Keyword(s):

Strategic Planning ◽

Public Administration ◽

Russian Federation ◽

World Market ◽

Planning System ◽

Investment Climate ◽

Investment Activity ◽

System A ◽

The World ◽

The Russian Federation

Competitiveness of Russia economy under modern conditions demands systemacy of public administration. As a result of creation of national strategic planning system a number of govern-ment programs aimed at the economy development of the Russian Federation and perspective en-trance of the country to the world market is carried out. One of the main tasks of the economy de-velopment is creation of favorable investment climate in the country, investment activity, attraction of investments into the economy of the country’s regions.

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Experimental investigation on a novel approach for laser surface hardening modelling

International Journal of Mechanical and Materials Engineering ◽

10.1186/s40712-020-00124-0 ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

L. Orazi ◽

A. Rota ◽

B. Reggiani

Keyword(s):

Surface Hardening ◽

Carbon Diffusion ◽

Industrial Applications ◽

Laser Surface ◽

Simplified Approach ◽

Laser Surface Hardening ◽

Novel Approach ◽

Laser Treatments ◽

High Flexibility ◽

Short Time

AbstractLaser surface hardening is rapidly growing in industrial applications due to its high flexibility, accuracy, cleanness and energy efficiency. However, the experimental process optimization can be a tricky task due to the number of involved parameters, thus suggesting for alternative approaches such as reliable numerical simulations. Conventional laser hardening models compute the achieved hardness on the basis of microstructure predictions due to carbon diffusion during the process heat thermal cycle. Nevertheless, this approach is very time consuming and not allows to simulate real complex products during laser treatments. To overcome this limitation, a novel simplified approach for laser surface hardening modelling is presented and discussed. The basic assumption consists in neglecting the austenite homogenization due to the short time and the insufficient carbon diffusion during the heating phase of the process. In the present work, this assumption is experimentally verified through nano-hardness measurements on C45 carbon steel samples both laser and oven treated by means of atomic force microscopy (AFM) technique.

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PEBB System Stability Margin Monitoring

Journal of Vibration and Control ◽

10.1177/107754602023820 ◽

2002 ◽

Vol 8 (2) ◽

pp. 261-276 ◽

Cited By ~ 8

Author(s):

Xiaogang Feng ◽

Zhihong Ye ◽

Fred C. Lee ◽

Dushan Borojevic

Keyword(s):

Stability Margin ◽

System Stability ◽

Linear Control ◽

Small Signal ◽

System A ◽

Novel Approach ◽

Implementation Approach ◽

Dc Bus ◽

Response Current ◽

Measurement Approach

PEBB (power electronics building block) systems are typical nonlinear systems. Under the conventional but still popular linear control design, the system stability margin varies from one operating point to another. This paper introduces a novel approach to monitoring the DC bus stability margin of a PEBB system online. At the steady state of the system, a small-signal perturbation current î p is injected into the DC bus, and the load-side response current î L is measured. By checking the validation |î L ( jw)| < |î p ( jw)|, the system stability margin can be examined. Experiments on a 48 V DC DPS demonstrate the proposed measurement approach. An implementation approach is also proposed for an 800 V DC PEBB-based testbed system.

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Optimum Strain Gauge Application to Bladed Assemblies

Volume 4: Turbo Expo 2002, Parts A and B ◽

10.1115/gt2002-30306 ◽

2002 ◽

Cited By ~ 1

Author(s):

J. Szwedowicz ◽

S. M. Senn ◽

R. S. Abhari

Keyword(s):

Strain Gauge ◽

Element Model ◽

Strain Gauges ◽

Structural Components ◽

Algorithm Optimization ◽

Rotating Blades ◽

Novel Approach ◽

Present Technique ◽

Optimization Function ◽

Rotating Impeller

Optimum placements of the strain gauges assure reliable vibration measurements of structural components such as rotating blades. Within the framework of cyclic vibration theory, a novel approach has been developed for computation of the optimum gauge positions on tuned bladed discs regarding the determined sensitivity, orthogonality, gradient and distance criteria. The utilized genetic algorithm optimization tool allows for an effective numerical search of suitable solutions of the defined optimization function. A rotating impeller disc represented by a cyclic finite element model demonstrates the application of this method. The present technique can be easily applied to other structural components requiring optimal strain gauge instrumentation.

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ADS analog digital system, a novel approach to CAD for mixed analog/digital ASICs

[Proceedings] EURO ASIC `90 ◽

10.1109/easic.1990.208028 ◽

2002 ◽

Cited By ~ 1

Author(s):

C. Caillon ◽

J. Remy ◽

J.M. Sanchez ◽

S. Scotti

Keyword(s):

Digital System ◽

System A ◽

Novel Approach

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P. vortex-mediated strategies for polysaccharides decomposition

TECHNOLOGY ◽

10.1142/s2339547815400087 ◽

2015 ◽

Vol 03 (02n03) ◽

pp. 80-83

Author(s):

Mark Polikovsky ◽

Eshel Ben-Jacob ◽

Alin Finkelshtein

Keyword(s):

Degradation Products ◽

Cellulose Degradation ◽

Cellulose Hydrolysis ◽

Industrial Applications ◽

Biofuel Production ◽

E Coli ◽

Novel Approach ◽

Textile Manufacture ◽

Hydrolysis Of Cellulose ◽

The Relationship

Cellulose hydrolysis has many industrial applications such as biofuel production, food, paper and textile manufacture. Here, we present a novel approach to cellulose hydrolysis using a consortium of motile bacteria, Paenibacillus vortex, that can swarm on solid medium carrying a non-motile recombinant E. coli cargo strain expressing the β-glucosidase and cellulase genes that facilitate the hydrolysis of cellulose. These two species cooperate; the relationship is mutually beneficial: the E. coli is dispersed over long distances, while the P. vortex bacteria gain from the supply of cellulose degradation products. This enables the use of such consortia in this area of biotechnology.

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