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Regenerative Brake Blending in Electric Hypercars: Benchmarking and Implementation 16th

Regenerative Brake Blending in Electric Hypercars: Benchmark...

引用

16th International Symposium on Advanced Vehicle Control

作者： Senofieni, Rodrigo Bassi, Federico Corno, Matteo Savaresi, Sergio Matteo Savaia, Gianluca Politecn Milan Piazza Leonardo da Vinci 32 I-20133 Milan MI Italy Rimac Technol Ljubljanska Ul 7 Brezje 10431 Croatia

ISBN: (纸本)9783031703942;9783031703928;9783031703911

This paper presents a novel Regenerative Brake Blending (RBB) strategy for an electric hypercar, framing it as a multi-objective problem. These include thermal and lifespan management of various components plus maximizing energy recovery. We begin by mathematically modelling each subsystem of the RBB layout. Then, we define an acausal offline optimal control problem to establish a benchmark solution;subsequently we propose a causal real-time control strategy inspired by the Equivalent Consumption Minimization Strategy (ECMS). The proposed real-time strategy shows a performance loss of 1.6% compared to the benchmark underscoring the efficacy of the proposed RBB strategy in maximizing energy recuperation while considering for brake temperatures.

关键词： Regenerative Brake Blending Pontryagin's Minimum Principle ECMS Electric Vehicles

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A Mesh-Free Non-Newtonian Approach for Modelling of Embankment Failure 23rd

A Mesh-Free Non-Newtonian Approach for Modelling of Embankme...

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

作者： Bhat, Niaverd Ul Hassan Pahar, Gourabananda Dhar, Anirban Indian Inst Technol Kanpur Kanpur Uttar Pradesh India Indian Inst Technol Kharagpur Kharagpur W Bengal India

ISBN: (纸本)9789819760084;9789819760091

A volume conservative divergence-free incompressible Smoothed Particle Hydrodynamics (SPH) framework is developed for modelling fluid flow through movable granular media. The framework considers fluid flow through porous media and movement of porous media separately. The granular media is modelled as an incompressible non-Newtonian fluid with variable viscosity based on Mohr-Coulomb criterion. Most of the currently available models adopt a unified approach with different rheology for modelling fluid and granular materials. However, simultaneous identification of dry and wet granular media becomes difficult for an integrated model. The current framework can simulate those cases because of coupled fluid and granular models. A force pair maintains the balance between two different flow phases. The viscosity of the granular media is calculated based on pressure and strain rates along with material parameters. The proposed framework is applied to two different cases of fluid flow through movable granular media. The first case considers a dam-break flow through a trapezoidal embankment and seepage failure at the downstream portion. In the second case, the initial water level height is increased to show the complete failure of the embankment. The water flow over the porous structure and its failure pattern are reported at different time instances. The coupled framework can efficiently track fluid flow through the porous and non-porous region as well as the failure of granular media along slopes.

关键词： ISPH Divergence-free Seepage failure Non-Newtonian fluid flow Coupled fluid-porous media framework

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Efficiency Improvements from Rounded Oscillating Water Column Entrances and Implications for Coastal Protection 23rd

Efficiency Improvements from Rounded Oscillating Water Colum...

引用

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

作者： Hick, Lachlan Tothova, Danica Manasseh, Richard Sannasiraj, S. A. Swinburne Univ Technol Melbourne Vic Australia Indian Inst Technol Madras Chennai Tamil Nadu India

ISBN: (纸本)9789819760084;9789819760091

A laboratory-experimental study was conducted on modifications to the entrance of the simplest possible geometry of an oscillating water column, which is a type of ocean wave-energy converter. The aim was to assess engineering-design modifications that could affect energy losses. Wave-energy converters are used to extract renewable energy from ocean waves, and also to protect coasts by reducing wave impacts on coastal environments and infrastructure. Waves were generated in a flume with realistic steepnesses and the amplitude of resonant water motion outside and inside an oscillating water column was measured with capacitance probes. The radius of curvature of the water column entrance was varied from sharp-edged to highly rounded using 3D-printed attachments. Preliminary findings suggest that the energy removed from waves could be greatly increased for the most highly rounded design operating in fairly steep waves, and increased further for operations in low-steepness waves. Rounded entrances, while more complex to construct, could therefore offer significant benefits in power generation and coastal protection.

关键词： Oscillating water column entrance rounded

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A General 3D Road Model for Motorcycle Racing 16th

A General 3D Road Model for Motorcycle Racing

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16th International Symposium on Advanced Vehicle Control

作者： Fork, Thomas Borrelli, Francesco Univ Calif Berkeley Berkeley CA 94708 USA

ISBN: (纸本)9783031703942;9783031703928;9783031703911

We present a novel control-oriented motorcycle model for nonplanar racetracks and use it for computing racing lines. The proposed model combines recent advances in nonplanar road models with the dynamics of motorcycles. Our approach considers the additional camber degree of freedom of the motorcycle body with a simplified model of the rider and front steering fork bodies. We demonstrate the effectiveness of our model by computing minimum-time racing trajectories on a nonplanar racetrack.

关键词： Vehicle Dynamics Motorcycles Road Models

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Development of a Quality Management Framework for Company Equipment Utilising Industry 4.0 1

引用

33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Pillay, P. Ramdass, K. R. Phuluwa, H. S. UNISA Johannesburg South Africa

ISBN: (数字)9783031744853

ISBN: (纸本)9783031744846;9783031744853

Company Equipment is a manufacturer of heavy industrial earth moving vehicles and equipment with an approach to quality and quality management rooted in aged technologies and processes. With the recent and currently evolving developments of the Fourth Industrial Revolution, this research project aimed to investigate these developments to understand the applications of the new technologies and focuses and how they impact the modern approach to quality and quality management. A literature review was designed and conducted to analyse and gain knowledge on Industry 4.0, Quality 4.0 and quality management. An investigation and analysis into the workings of the quality management approach at Company Equipment was conducted. A conceptual quality management framework based on Industry 4.0 was developed and evaluated in terms of Company Equipment. Results of the evaluation indicated the net gain of benefits for the utilization of the proposed quality management framework for Company Equipment.

关键词： Fourth Industrial Revolution Industry 4.0 Quality 4.0 Quality Management Framework

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Simulation Approach for Solving Production Problems Reducing Total Processing Time 32nd

Simulation Approach for Solving Production Problems Reducing...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Pereira, Sibelle Henriques, Marcelo Varela, Leonilde Vicente, Jose Freitas, Luis Machado, Jose Univ Minho Dept Prod & Syst ALGORITMI Res Ctr LASI P-4804533 Guimaraes Portugal InsideLimits Vila Nova De Gaia Portugal Univ Minho MEtRICs Res Ctr P-4804533 Guimaraes Portugal

ISBN: (纸本)9783031381645;9783031381652

This paper presents an application of computational simulation to a production problem on unrelated parallel machines and dependent setup times, aiming at the reduction of jobs' total processing time (makespan). The scenarios studied by Rabadi, et al. (2014) were used, along with the SIMIO simulation software, to model and conduct experiments to study the impact of a set of sequencing rules. Based on the computational study carried out, it was possible to realize that simulation is a powerful tool to support scheduling processes, as it allows to reach generally good results in a reasonable time to properly support decision-making in the resolution of production problems. These problems are highly complex and dynamically changing in nature, being usually hard to solve. Thus, simulation tools are of particular interest in this field. Moreover, as these problems are characterized by a more or less extensible set of factors, parameters and conditions, it continues to be of primer importance to further explore its resolutions, namely based on simulation tools. This study relies on the base for being used in industrial practice in the context of iFixturing Project.

关键词： Production problems Parallel machines Setup times Modeling Discrete event simulation

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Comparison of Vibration Characteristics of Floating Slab Track in Rail Transit Viaduct with Time-Domain and Frequency-Domain Models 14th

Comparison of Vibration Characteristics of Floating Slab Tra...

引用

14th International Workshop on Railway Noise (IWRN)

作者： Song, Qingyuan Li, Qi Tongji Univ Dept Bridge Engn 1239 Siping Rd Shanghai Peoples R China

ISBN: (纸本)9789819978519;9789819978526

Floating slab tracks have been widely adopted in rail transit viaducts to reduce the bridge vibration and structure-borne noise. To calculate the vibration of the coupled track-bridge systems, both time-domain and frequency-domain methods can be applied although their relative performance is not very clear. This study aims to compare the two methods and then provide some guidelines in choosing the appropriate method in the vibration prediction. The principle and methodology of the two calculation methods are firstly introduced, and the models for the train, track and bridge are developed using the same parameters. Comparison is made of the vibration of bridge and floating slab obtained from the two methods with different train speeds. It is found that the results from the two methods show good consistency in the frequency region above 20 Hz. It is shown that the results from different loading cases should be averaged with care when the frequency domain method is adopted. When using irregularity measured on site, the simulated vibration of floating slab and bridge from the two methods match well with the experimental results.

关键词： Floating slab track Bridge Vibration Coupled track-bridge systems

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Maintenance Strategy Selection: An Approach Based on Equipment Criticality and Focused on Components 32nd

Maintenance Strategy Selection: An Approach Based on Equipme...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Teixeira, Humberto Nuno Lopes, Isabel Silva Pires, Rafael Nunes Univ Minho ALGORITMI Res Ctr LASI Guimaraes Portugal Sonae Arauco Portugal SA Oliveira Do Hosp Portugal

ISBN: (纸本)9783031381645;9783031381652

The selection of appropriate equipment maintenance strategies is essential for avoiding accidents and unnecessary operating costs in companies. This paper aims to propose a methodology which makes use of Decision-Making Grids (DMGs) for classifying and prioritizing the manufacturing assets according to their criticality and, accordingly, selecting the most appropriate maintenance strategy for the analyzed assets components. The ability to support the assignment of maintenance strategies at the component level distinguishes the proposed methodology from the related studies found in the literature, as they define a unique type of strategy for the equipment as a whole or strategies focused on its functional failures. The assets classification and prioritization is performed considering the failure impact and quantitative criteria related to their maintenance history. Therefore, the methodology can also be used as a performance measurement tool for identifying the need of redefining the maintenance plan of specific assets or implementing equipment improvement initiatives. The methodology was successfully applied in a case study performed in a company that produces wood-based panels. Its application enabled to assign maintenance strategies to the six components with higher frequency of replacement of one safety critical equipment in a quick manner. The case study has also shown that the effort and resources required for applying the methodology are low, since it uses mainly data recorded by the current management systems.

关键词： Equipment criticality Maintenance management Maintenance planning

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Preliminary Design of an Automatic Palletizing System During the Pre-sales Stage 32nd

Preliminary Design of an Automatic Palletizing System During...

引用

32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Guidetti, Enrico Bilancia, Pietro Raffaeli, Roberto Pellicciari, Marcello Univ Modena & Reggio Emilia Dept Sci & Methods Engn Via Amendola 2 I-42122 Reggio Emilia Italy

ISBN: (纸本)9783031382406;9783031382413

The study of an automated system for intralogistics requires an important use of time and resources, starting from the input data analysis up to the definition of the technical solution. While many commercial tools are available for testing and optimizing the plant performance during the advanced design stages, little work has been done concerning the workflow to be followed at the pre-sales design phase. In this context, the present paper focuses on the definition of the best practices for the correct preliminary definition of a robotic cell for palletization. To simplify and speed up the pre-sales feasibility study and estimate the performance of the proposed robotic system, an engineering approach based on a simplified theoretical model is reported and integrated within a dynamic calculation table. As the main output, the proposed tool calculates the robot saturation which is a key index for the plant preliminary definition.

关键词： Industry 4.0 Palletizing Robotic System Pre-Sales Design Performance Definition Design Tool

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Subcooled Boiling Heat Transfer Using a Semi-mechanistic Wall Boiling Model 14th

Subcooled Boiling Heat Transfer Using a Semi-mechanistic Wal...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Khaware, Alok Gupta, Vinay Kumar Punekar, Hemant Ali, Anime Ben Hadj Ansys Software Pvt Ltd Rajiv Gandhi Infotech Pk Pune 411057 Maharashtra India Ansys Germany Gmbh Darmstadt Germany

ISBN: (纸本)9783031666087;9783031666094

Modern cooling system design is challenging because of increasingly stringent requirements, such as high compactness, reduced cost, and limited space envelopes. Providing a subcooled boiling flow in thermally highly loaded regions became popular compared to pure single-phase convection as it significantly enhances the heat transfer rate. Though nucleate boiling increases the cooling effect, the subsequent film boiling decreases the heat transfer drastically. Therefore, it is essential to understand the boiling characteristics of a given cooling system. Experimental investigations for boiling are highly challenging, and numerical simulations provide a comparably more straightforward and fast solution. In the present work, a semi-mechanistic wall boiling model implemented in Ansys Fluent software captures the complex phenomena associated with the two-phase flow heat transfer. Heat transfer augmentation at the wall is modeled by empirical correlations proposed by Chen et al. The semi-mechanistic boiling model is implemented within the single momentum mixture multiphase model. The wall heat flux is partitioned according to Kutateladze following an asymptotic power law. Nucleate boiling heat flux contribution is modeled following Foster and Zuber. The new implementation is validated using data from experiments of water flowing over a heated plate in a channel. A sensitivity study is conducted for the different controlling parameters for the semi-mechanistic boiling model, such as superposition constant, evaporation frequency, and optimum settings captured. A mesh sensitivity study is also conducted. The numerical results show a reasonable match with the experimental with a maximum error of about 10% for a few data points at high temperatures.

关键词： Subcooled boiling Semi-Mechanistic boiling Wall heat transfer

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