Artículos de conferencia

Permanent URI for this collection

https://repositorio.uc.cl/handle/11534/23156

Browse

Browsing Artículos de conferencia by browse.metadata.categoriaods "12 Producción y consumo responsable"

Now showing 1 - 5 of 5
  • Thumbnail Image
    Item
    Hybrid predictive modeling and simulation of the Teniente converter
    (IEEE, 2009) Schaaf Fritis, Max Alexander; Cipriano, Aldo
    The principal copper pyrometallurgical technology employed in Chile is the Teniente converter (TC). The smelting and converting processes involve complex dynamics with strong interactions among manipulated variables, state variables, and product characteristics. Furthermore, the converter products are periodically extracted in a semi-continuous process. Previous applications of model predictive control in TC operation have shown good performance. The recent development of an online-sensor for measuring the levels of the liquid phases opens up new possibilities for control of the process. The TC prediction model must accommodate discrete states for the white metal and slag tap holes. When the TC is inclined for maintenance, the injection system is disconnected and slag evacuation may occur via the converter mouth, thus affecting liquid level dynamics. The three possible incline positions or angles determine three discrete states, each one corresponding to a different set of liquid dynamics. Describing these situations therefore requires a hybrid dynamic model. This paper presents a hybrid grey box model for the Teniente converter process that combines continuous and discrete variables to describe six different operating mode.
  • Thumbnail Image
    Item
    Improving Premanufacturing Phases in Off-Site Construction Through a Digitalization Approach
    (2023) Barkokebas, Beda; Ost, Felipe; Mourgues Alvaréz, Claudio Enrique; Saruhashi, Lissa
    The integration of digitalization and building information modelling (BIM) has been lauded as a cornerstone to improve processes and enhance communication across the construction industry. Nevertheless, the implementation of digitalization approaches has suffered due to the lack of methods and processes uncertainties, particularly in the case of off-site construction (OSC) companies where its premanufacturing phases (design, planning, and procurement) differ significantly from traditional construction. This research presents a case study of a digitalization-based workflow to reduce the duration and increase accuracy of premanufacturing phases. To that end, a digitalization plan is developed using value stream maps, supported by Monte Carlo simulation, to identify the waste of current practices and propose suitable improvement measures. Afterwards, a digitalization-based workflow is developed and implemented to exchange data between BIM models and other systems. After one year and a half of implementation, the proposed workflow reduced the duration of tasks in 92.31% while providing an average of 12.24% more accurate bill of materials compared to the previous approach. As such, the contribution of this study is twofold: first, a lean-based method to implement digitalization in OSC companies considering its particularities and inherited process uncertainties; and second, an improved process for OSC premanufacturing phases
  • No Thumbnail Available
    Item
    Optimal planning of a multi-station system with sojourn time constraints
    (SPRINGER, 2005) Singer González, Marcos Johanan; Donoso Ibáñez, Patricio; Noguer Aceitón, José Luis
  • Thumbnail Image
    Item
    Simulation Paper Planes a Way to Teach Lean Production
    (IEEE, 2020) Salazar Fica, Luis Arturo; Revuelta, M. P.
    This article contributes to efforts to teach new methodologies for Industrial Engineering and Engineering Management. Therefore, the creation of the Simulation Paper Planes is presented to teach the principles of Lean Production. The document details the basic rules, general instructions, materials, manufacturing drawings, key performance indicators, and rounds of this simulation. This simulation is a direct and straightforward way to explain and demonstrate the importance of applying the Lean Principles in projects and production processes anywhere in the world. Of the 14 Lean principles, the authors managed to get participants to use 11. As future research, the authors call teachers and consultants to apply this simulation to students (Civil, Industrial, and Construction Engineering) and professionals, to generate a more extensive database. Also, they propose a line of research regarding the level of education in Lean practices between different countries, because, in general terms, undergraduate students in Chile were at the level of graduate students in Colombia.
  • No Thumbnail Available
    Item
    Who wants to break the hockey-stick sales pattern in the supply chain?
    (SPRINGER, 2009) Singer González, Marcos Johanan; Donoso Ibáñez, Patricio; Konstantinidis, Garo