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检索条件"丛书名=Lecture Notes in Mechanical Engineering"

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A Model-Based Digital Twin for Adaptive Trajectory Planning of a Robot for Mixed Packaging Process and Active Collision Avoidance 32nd

A Model-Based Digital Twin for Adaptive Trajectory Planning ...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Chaloulos, Alexios Nikolakis, Nikolaos Alexopoulos, Kosmas Univ Patras Lab Mfg Syst & Automat Dept Mech Engn & Aeronaut Patras 26504 Greece

ISBN: (纸本)9783031382406;9783031382413

This work discusses the need for dynamically adaptive trajectory planning of a robotic mixed packaging station, as driven by the need to package different product mixes and the fact that human operators are part of the mixed packaging process. A model-based digital twin is proposed as the key enabling technology to support adaptive robot trajectory planning and generation based on different mixed packaging orders and to facilitate seamless human-robot interaction in the packaging process. The proposed approach has been tested in a use case related to the food industry, supporting the benefits arising from the introduction of advanced digital solutions in production environments.

关键词： Active collision-avoidance Adaptive planning Digital twin

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Numerical and Experimental Analysis of the Influence of Manufacturing Parameters in Additive Manufacturing SLM-PBF on Residual Stress and Thermal Distortion in Parts of Titanium Alloy Ti6Al4V 14th

Numerical and Experimental Analysis of the Influence of Manu...

引用

14th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM)

作者： Santos, M. O. Maiolini, A. S. F. R. Miranda, F. Farias, A. Seriacopi, V Bordinassi, E. C. Batalha, G. F. Maua Inst Technol Dept Mech Engn Univ Ctr Sao Caetano do Sul SP Brazil Univ Sao Paulo Polytech Sch Dept Engn Mechatron & Syst Mech Sao Paulo SP Brazil

ISBN: (纸本)9783031580086;9783031580062;9783031580055

Additive manufacturing (AM) has become popular in recent years due to its integration with Industry 4.0 and for enabling the production of complex and optimized geometries. However, the process leads to disadvantages, such as thermal distortions and the generation of residual stresses due to thermal gradients during the parts production. Based on these undesirable characteristics, this work aims to model AM numerically through the Finite Element Method (FEM), besides obtaining experimental results that relate the impact of different process parameters, such as laser power, speed, and hatch distance on the residual stress and distortions distribution, to parts generated by Selective Laser Melting (SLM)-Powder Bed Fusion (PBF)-of titanium alloy Ti6Al4V. The experimental tests, as well as the numerical analyses, followed a factorial design. The results for thermal distortions are excellent with differences below 4.5% between the manufactured and simulated parts. As for the results of residual stresses measured at a single point on the lateral face, for most of the results, the difference was less than 4%;however, there was a large dispersion of results. When the values of average residual stresses were considered in the simulation, the results had statistical relevance and showed greater robustness. It was found that the average diameter of Ti6Al4V titanium parts was greatly influenced by the laser power followed by the hatch distance. The increase in power increased the average diameter of the samples, while the increase in speed and hatch decreased their diameter. In turn, increasing laser power decreased residual stress, while increasing speed and hatch tended to increase the mean residual stress.

关键词： Additive manufacturing SLM Titanium alloy Ti6Al4V Numerical simulation Thermal distortions Residual stresses

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Wave Force on a Partially Immersed Caisson Supported on Piles 23rd

Wave Force on a Partially Immersed Caisson Supported on Pile...

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2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Vasanthakumar, S. Sannasiraj, S. A. Sundar, V Ramanarayan, S. Karthik Indian Inst Technol Madras Dept Ocean Engn Chennai Tamil Nadu India

ISBN: (纸本)9789819760084;9789819760091

This paper describes total wave-induced forces, moments on a pile-supported vertical caisson through an experimental investigation. It is crucial to comprehend the total force acting on the vertical caisson-pile-supported breakwater (VC-PSB) as the integration of measured dynamic pressure on the front face might give only an approximate estimate due to scarce pressure port locations. The experiments were carried out in a wave flume in three water depths (0.79, 0.87, and 0.95 m), and the model was subjected to regular waves with wave periods ranging from 1 to 2.6 s for each of which two wave heights 0.1 and 0.15 m were employed. A larger pile spacing-to-diameter ratio (s/D > 7) was maintained so that the piles had a minor contribution to the dissipation of incident wave energy. A force balance with six-component force sensors was used to measure the forces in all directions, and the moments were estimated knowing the lever arm distance of force sensors. The measured shoreward horizontal forces are compared with those computed from the standard formula for an elevated vertical caisson with a negative air gap. The structure was found to experience more vertical force than horizontal force for the three water depths considered. The vertical forces decrease exponentially with an increase in the relative depth. The horizontal forces decrease with relative submergence as the exposure area of the caisson exposed to waves decreases. The moment variation is primarily identical to the horizontal force variation.

关键词： Wave forces Wave-induced pressures Caisson Piles and pile-supported breakwater

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Characterization of Micro-nanostructured Thin Layers Used to Increase the Lifetime of Hip Prosthesis Components 32nd

Characterization of Micro-nanostructured Thin Layers Used to...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Badita-Voicu, Liliana-Laura Zapciu, Aurel Angelescu, Dorin Vociu, Adrian-Catalin Natl Inst Res & Dev Mech & Measurement Tech Pantelimon St 6-8 Bucharest 021361 Romania

ISBN: (纸本)9783031382406;9783031382413

The main objective of the project described in this article was to evaluate and improve the operational capability of prostheses components coated with micro-nanostructured thin layers that were deposited by physical processes. The micro-nanostructured thin layers of TiN and TiO2 were characterized from tribological and technical-functional point of view on disk samples and real prostheses components. After determining the hardness, elastic modulus, friction coefficient and wear rate of these thin layers, with thicknesses of 0.5 mu m, 1 mu m and 1.5 mu m, deposited on CoCr and M30NW steel substrates by the Cathodic Arc (CA), Direct Current (DC) sputtering and High-Power Impulse Magnetron Sputtering (HiPIMS) methods, it was concluded that the layers with a thickness of 1.5 mu m, deposited using the DC sputtering method, have superior mechanical properties. TiN and TiO2 layers with a thickness of 1.5 mu m were technically and functionally characterized on hip prostheses and it was demonstrated that the use of these layers increases the resistance to fatigue wear of the hip prostheses components. The main conclusion of these researches and the comparative analysis was that the TiN layer with a thickness of 1.5 mu m, deposited by DC sputtering on both substrates has a superior resistance to fatigue wear compared to the TiO2 layer.

关键词： Thin Layers Tribological Characterization Prostheses

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CFD Validation of Forced and Natural Convection for the Open Phase of IAEA Benchmark CRP-I31038

CFD Validation of Forced and Natural Convection for the Open...

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Saudi International Conference on Nuclear Power engineering (SCOPE)

作者： Batta, Abdalla Class, Andreas G. Karlsruher Inst Technol KIT Hermann Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany

ISBN: (纸本)9783031643613;9783031643620

The goal of the IAEA Coordinated Research Project "Benchmark of Transition from Forced to Natural Circulation Experiment with Heavy Liquid Metal Loop" (CRP - I31038) is to develop Member State advanced fast reactor analytical capabilities for simulation and design using system, CFD, and subchannel analysis codes. Here we present CFD validation employing the commercial CFD code Star CCM + applied to the fuel pin simulator for forced and natural convection cases in the open phase where experimental data is provided in the benchmark specification provided by ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) for the NACIE-Up facility (NAtural CIrculation Experiment-UPgrade). Considered is the fuel pin simulator with 19 pins, each consisting of a preheated lower section and heated upper sections, respectively. Three configurations (i) all pins heated, (ii) inner 7 pins heated and (iii) asymmetric heating are studied. For each heating configuration data for forced and natural convection are provided. Here case (i) is studied. Temperatures at three planes are measured near the inlet, in the middle and near the end of the heated section, respectively. In addition, the axial temperature along the wall of one fuel pin simulator (in second row) is measured so that in total 67 thermocouples measure fluid and wall temperatures for validation purposes. Our validation confirms that the thermohydraulic inside the fuel pin simulator can be simulated with a good accuracy. Applied is a polyhedral mesh with 2 prism layers, the k-omega SST model with all all-wall treatment and order unity y + values. Moreover, we performed a grid-sensitivity study and analysed the importance of conjugate heat transfer inside the fuel-pin simulators and the wrapper. Our studies indicate that it is possible to implement further simplifications without corrupting the accuracy of the simulation to reduce computational effort.

关键词： CFD Liquid metal thermal hydraulic Turbulent flow Wire-wrapped bundle flow

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Crop Yield Predictions Based on Machine Learning 23rd

Crop Yield Predictions Based on Machine Learning

引用

2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Arunya, K. G. Krishnaveni, M. Anna Univ Ctr Water Resources Chennai Tamil Nadu India Anna Univ Inst Ocean Management Chennai Tamil Nadu India

ISBN: (纸本)9789819760084;9789819760091

Machine learning (ML) is an important tool in decision-making and many ML algorithms are used in crop yield prediction. ML algorithm predictions are based on various dependent factors. In this study, climate variabilities such as precipitation and crop yield are considered as the dependent factors. This paper shows a micro-level study which concentrates on the Paravanar River Basin which is situated on Cuddalore District, Tamil Nadu, India. There are more than 40 crops grown in this region and the main source of irrigation is the north-east monsoon rainfall. Since, the hypothesis is tested between the annual rainfall and the crop yield, the crops which are cultivated throughout the year are chosen for analysis. They are cashew nut, coriander, sugarcane, sweet potato and turmeric. The PERSIANN-CDR data from National Centres for Environmental Information-National Oceanic and Atmospheric Administration was used as the precipitation data and the agriculture crop production data was downloaded from Ministry of Agriculture and Farmers Welfare of India. The datasets were tested using the following ML algorithms logistic regression, decision tree classifier, random forest classifier and XGBoost classifier. Implementation of ML-derived results can only be done through participatory approaches. Therefore, participatory rural appraisal was done with the farmers and the villagers to assess the willingness of implementation and it shows positive results. Hence the main aim of the study tests the hypotheses on dependency of crop yield on precipitation on a regional scale.

关键词： Machine learning Precipitation Crop yield Participatory rural appraisal

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IOT Based Smart Plant Monitoring System 1

引用

International Conference on Production and Industrial engineering, CPIE 2023

作者： Oberoi, Paras Jain, Arohi Goyal, Sandeep Garg, Himanshu Kane, Aarti Talwar, Manish Bharati Vidyapeeth’s College of Engineering New Delhi India

ISBN: (数字)9789819983438

ISBN: (纸本)9789819983421

With advancement of technology, each field is growing rapidly and becoming automated. Automation in industrial area has led to enhancement of quantity of products as well as made the whole process less time consuming. In industries, at a time, a lot of parameters are controlled for maintaining the appropriate environment in the industry. But till now, many mishaps occur in industry due to loss of readings while monitoring and controlling of various parameters, and this is controlled by the engineers. It is very difficult for a human to continuously monitor the system. In our paper, we have designed a smart plant monitoring system to overcome this problem in which we are taking the readings or values of different parameters on a single server (portal) using Internet of Things (IoT). We have monitored and recorded the values of parameters such as level, temperature, and humidity and if any parameter exceeds its limit, then the system takes the predefined action. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Internet of things

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Scaling of a Modular Production System (MPS) with Manufacturing Execution System (MES) and Multiple Agents 1

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11th International Conference on Mechatronics and Control engineering, ICMCE 2023

作者： Llumiquinga, Paola Jéssica Armijos, Manuel Alberto Oñate, William Paul Caiza, Gustavo Javier Universidad Politécnica Salesiana Quito Cuenca170146 Ecuador

ISBN: (数字)9789819965236

ISBN: (纸本)9789819965229

The digital transition currently taking place involves the existence of various studies to deliver solutions to digital industrial processes, and a systematic review of such studies has made evident a limitation with respect to those papers about implementation in the academy and confidential pilot tests developed by large industrial companies;all this situation decelerates the joint implementation of operation and information technologies (OT and IT) that enable scaling industrial automation and control systems (IACS). This paper implemented a manufacturing execution system (MES) to a Festo MPS-500 modular production system under the cores of the ISA-95 standard as a guide in data collection, production scheduling and product traceability;the stages of the production process are executed through multiple agents, in response to a mini batches order placed by a user through the internet, and the system also watches power consumption in case of no request, generating administrative and maintenance reports. The average latency metrics from the instant in which the user requests a mini-batch until the moment in which the plant starts the execution is 1.59% of the duration of the manufacturing process, indicating that the MES is not critical during the communication time with the server of the M2M (Machine to Machine) database. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Cyber Physical System

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Modeling and Control of BLDC Motor for Scaled Autonomous Vehicle Application 1

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11th International Conference on Mechatronics and Control engineering, ICMCE 2023

作者： Hachem, Mohamad Medero, Ariel Atoui, Hussam Sename, Olivier Université Grenoble Alpes CNRS Grenoble INP GIPSA-Lab Grenoble38000 France Team Créteil94000 France Institut de Robòtica i Informàtica Industrial C/. Llorens i Artigas 4-6 Barcelona08028 Spain

ISBN: (数字)9789819965236

ISBN: (纸本)9789819965229

This paper includes a brief study of a BLDC motor considering it an important actuator in new autonomous applications. It can be a sample in treating such actuators from a low level till reaching a controlled closed-loop system. The BLDC motor with the presence of ESC (Electronic Speed Controller) is modeled as a DC motor. Experimental results with gray-box identification techniques were used to validate this assumption. Robust H∞ controller is implemented and compared with the conventional PI controller. To improve the controlled system loop an observer is designed and implemented in real-time. It works on the fusion of multiple sensors available on the platform. The targeted actuator is identified and controlled as a part of controlling and developing remote-control (RC) vehicles found in GiPSA-LAB. The main contribution of this paper is to propose a strategy that helps treat the BLDC motors used in scaled autonomous vehicles and pave the way for designing vehicle longitudinal controllers. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Actuators

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Assessment and Strengthening of Cement Plant Clinker Silo Structure Due to Corrosion of Reinforcing Bars 1

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4th International Conference on Experimental and Computational Mechanics in engineering, ICECME 2022

作者： Mubarak, Azzaki Hasan, Muttaqin Saidi, Taufiq Fonna, Syarizal Department of Civil Engineering Universitas Syiah Kuala Jl. Tgk. Syech Abdul Rauf No. 7 Banda Aceh23111 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Jl. Tgk. Syech Abdul Rauf No. 7 Banda Aceh23111 Indonesia

ISBN: (数字)9789819974955

ISBN: (纸本)9789819974948

Strengthening and repairs need to be carried out on the clinker silo of the Lhoknga Cement Plant, where there has been significant damage, making the silo unable to function at full capacity. Damage to reinforced concrete where cracks and spalling occurred as well as corrosion of reinforcing steel was assessed. The assessment was carried out using the following methods: visual inspection, rebound hammer test, ultrasonic pulse velocity test, and corrosion potential measurement using a half potential cell. From the assessment results, there have been many cracks and severe corrosion in the reinforced concrete slab, which reduces the strength of the structure. For this reason, the structural strengthening of the slab using CFRP was carried out so that the structural capacity can increase and be able to withstand the required working load. Meanwhile, in the clinker silo wall, the potential corrosion is still at a moderate level and does not pose a significant hazard to the structure in the near term. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Damage detection

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