Forthcoming articles

 


International Journal of Service and Computing Oriented Manufacturing

 

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International Journal of Service and Computing Oriented Manufacturing (8 papers in press)

 

Regular Issues

 

  • Multi-task parallel collaborative design based on SoC multi-core architecture   Order a copy of this article
    by Xiaofu Zou, Yue Tang, Shicheng Zhan, Ying Zuo 
    Abstract: The high efficiency of executing tasks is demanded in aerospace field. In the design of the control system, adopting single processor can hardly meet the demand of efficiency required by the system. Although adopting processor array composed by multiple single processors can enhance the execution efficiency of multi-task to some extent, the drawbacks of processor array in terms of the size of the hardware, payload and off-chip bus delay cannot be ignored. In order to solve the above mentioned problems, this paper is intended to study the multi-core environment construction based on SOC (System on Chip) and collaborative parallel design of multi-task from the perspective of multi-processors array based on on-chip high-speed bus. Firstly, multi-core architecture based on SOC is achieved, which includes constructing two MicroBlaze cores and designing inter-core communication based on MailBox, constructing two ARM (advanced RISC machines) cores and designing inter-core communication based on OCM (on chip memory), designing communication between MicroBlaze cores and ARM cores based on OCM, as well as designing external data collection and hardware acceleration unit based on FPGA (field programmable gate array). Secondly, approaches used in the study should be used into actual projects. In this paper, collaborative parallel design of some of the tasks in the design of the missile control system is studied. Finally, a verification platform is developed. By comparing with single core processor, it is proved that the approaches proposed in this paper have advantages over enhancing the efficiency of executing multiple tasks.
    Keywords: multi-core; SoC; multi-task; parallel; FPGA; ARM.

  • Alarm device for locating people submerged beneath water based on the geomagnetic sensor   Order a copy of this article
    by Chen Zhou, Liu Lin, Quan Wang 
    Abstract: An alarm device consisting of data collection module, control module and radio frequency module for locating people submerged beneath water is investigated. By combining the magnetic field distribution information and acceleration sensor, the alarm device is able to simulate submerged person movement path in the data collection module. STC89C51 is selected as the main control chip in the control module for alarm switching, information encoding and control of radio frequency mode. A third-generation wireless transceiver chip nRF2401 is adopted in the radio frequency module, allowing data transmission in the international ISM frequency range. The implementation based on the geomagnetic sensor that is simple in design, boasts full functions and has excellent drowning detection sensitivity. Additional wireless emission coordinate capability will improve efficiency and shipwreck rescue and maritime navigation in the future.
    Keywords: Geomagnetic sensor;locating people;alarming device.

Special Issue on: I3M 2016 Advanced Computing and Simulation Based Manufacturing

  • Development of an information fractal to optimise inventory in the supply network   Order a copy of this article
    by Sameh Saad, Ramin Bahadori 
    Abstract: The aim of this research paper is to develop a new conceptual framework for an information fractal to optimise inventory including safety stock, cycle stock and prevent stock out at lowest logistics cost and further enhance integration within the network. The proposed framework consists of two levels; top and bottom level fractals. Fractals in the bottom level analyse demand, optimise safety stock and then transmit output to the top level fractal. Fractals in the top level investigate different replenishment frequencies to determine the optimum cycle stock for each fractal in the bottom level. The proposed conceptual framework and a hypothetical supply network are implemented and validated using mathematical modelling and Supply Chain GURU Simulation Software; in order to optimise inventory in the supply network during the demand test period. Experimental factorial design and statistical techniques (MANOVA) are used to generate and analyse the results.
    Keywords: Fractal supply network; supply network modelling; inventory optimisation; simulation; modelling.

  • Solving a Real World Steel Stacking Problem   Order a copy of this article
    by Sebastian Raggl, Andreas Beham, Fabien Tricoire, Michael Affenzeller 
    Abstract: We present a real world steel slab stacking problem. The problem features continuous production and retrieval and non-instantaneous crane movements. There are stacking constraints, based on dimensions, weight and temperature of the slabs and temporal constraints based on the casting schedule, the delivery due times as well as the availability of rolling pallets for transport. We present a prioritisation heuristic for the possible crane movements. Based on this heuristic we build a branch and bound solver as well as a greedy look-ahead heuristic. We evaluate the heuristics using randomly generated problem instances of various sizes with the same characteristics as the real world problem and find that the greedy look-ahead heuristic outperforms the branch and bound approach when using realistic time limits.
    Keywords: Steel stacking;Stacking problem;Branch & bound;Greedy heuristic.

  • Analysis of cumulative energy demand and carbon footprint in residential building structures   Order a copy of this article
    by Esteban Fraile-Garcia, Javier Ferreiro-Cabello, Francisco Javier Marrodan-Esparza, Emilio Jimenez-Macias 
    Abstract: Abstract: This paper assesses the impact of the arrangement of pillars and building height in residential building structures and its effect on the environmental impacts of the structural solution. Impacts are analysed in the elements of the structure: foundations, pillars (or columns), and slabs. The manufacturing process of materials and the process of implementation of the proposed structure are measured by using both embodied energy and carbon footprint. The results are obtained per executed square meter. The analysis provides the optimal arrangement for the pillars and the height of the building; the increase in separation of the pillars causes greater impacts, and the design of tall buildings also drives to an important increase of resource consumption. The blocks in which the structures were split have different weights. The most representative are the slabs, around 80% compared to 7% of the pillars and 13% of the foundations. The decisions made in the layout of pillars in the design phase have a different impact on the items of the structure, and their analysis and assessment are developed in this work.
    Keywords: Reinforced concrete. Cumulative energy demand (CED). Carbon footprint. Building. Structure. Models. Environmental impact analysis. Modelling. Simulation.

  • A Framework for Multi-UAV Software in the Loop Simulations   Order a copy of this article
    by Ernesto Santana, Romualdo Moreno, Christian Sánchez, Miquel Piera 
    Abstract: In this paper, we present a Software-in-the-Loop simulation framework for multi-UAV systems which allows test the implementation of single or multi-UAV applications, including different cooperation algorithms, sense & avoid algorithms, etc., without taking any risk. In our proposed framework, we can test the correct execution of algorithms, and since our setup is inherently multi-UAV, we can also test the communication flow among the vehicles. The simulation framework has been developed as a functional extension of Mission Planner, open source software aimed to plan, control and analyze data from missions of a single UAV driven by Ardupilot flight controllers.
    Keywords: SiL; multi-UAV; Mission Planner; Simulation Framework; Simulation environment; Simulated UAVs; Ardupilot Mega; MAVProxy; MAVLink; RPAS.

  • A comparative study of hyperelastic constitutive models for an automotive shaft seal material   Order a copy of this article
    by Rafael Tobajas, Daniel Elduque, Carlos Javierre, Elena Ibarz, Luis Gracia 
    Abstract: The use of thermoplastic elastomers has increased strongly in recent decades in order to improve the manufacturing of numerous components within the machinery construction and automotive industry. The high manufacturing costs for this type of materials require a careful design phase in order to the final product can be according with the required specifications. One of the most important challenges that engineers face when designing with this type of materials is the simulation of mechanical behaviour using numerical methods. This task is not always easy since these materials often have a strongly non-linear behaviour. In this work, a thermoplastic elastomer material has been analyzed and an automotive component has been studied by means of five numerical simulations with five different constitutive models of material. This study shows that a careful selection of the constitutive model must be made to obtain reliable results since although several constitutive models fit well with the experimental data of the uniaxial and planar extension tests, when used in real components, there are significant differences in the obtained results.
    Keywords: hiperelasticity; thermoplastic elastomer; finite element method; simulation.

  • Optimisation and simulation of an e-bike manufacturing system: the case of a small assembly factory   Order a copy of this article
    by Pedro González-Hernández, Aida Huerta-Barrientos, Idalia Flores De La Mota 
    Abstract: The production possibilities of electric bicycles range from simple assemblies to in-plant production of main components such as the engine or frame. In Mexico, small companies were the first to produce e-bikes, however, this sector faces the lack of theoretical tools for the design and implementation of their manufacturing systems. The purpose of this study was to develop a simulation model of an e-bike manufacturing system that maximizes the system productivity. The model was developed using the DES methodology proposed by Jerry Banks and was implemented in AnylogicTM software. The design and analysis of experiments was performed using Minitab
    Keywords: electric bicycles; sustainable transportation; optimisation via simulation; manufacturing throughput; discrete event-simulation; decision-making; AnyLogic; OptQuest.