138 research outputs found
A Process to Implement an Artificial Neural Network and Association Rules Techniques to Improve Asset Performance and Energy Efficiency
In this paper, we address the problem of asset performance monitoring, with the intention
of both detecting any potential reliability problem and predicting any loss of energy consumption
e ciency. This is an important concern for many industries and utilities with very intensive
capitalization in very long-lasting assets. To overcome this problem, in this paper we propose an
approach to combine an Artificial Neural Network (ANN) with Data Mining (DM) tools, specifically
with Association Rule (AR) Mining. The combination of these two techniques can now be done
using software which can handle large volumes of data (big data), but the process still needs to
ensure that the required amount of data will be available during the assets’ life cycle and that its
quality is acceptable. The combination of these two techniques in the proposed sequence di ers
from previous works found in the literature, giving researchers new options to face the problem.
Practical implementation of the proposed approach may lead to novel predictive maintenance models
(emerging predictive analytics) that may detect with unprecedented precision any asset’s lack of
performance and help manage assets’ O&M accordingly. The approach is illustrated using specific
examples where asset performance monitoring is rather complex under normal operational conditions.Ministerio de Economía y Competitividad DPI2015-70842-
Advanced Techniques for Assets Maintenance Management
16th IFAC Symposium on Information Control Problems in Manufacturing INCOM 2018
Bergamo, Italy, 11–13 June 2018. Edited by Marco Macchi, László Monostori, Roberto PintoThe aim of this paper is to remark the importance of new and advanced techniques supporting decision making in different business processes for maintenance and assets management, as well as the basic need of adopting a certain management framework with a clear processes map and the corresponding IT supporting systems. Framework processes and systems will be the key fundamental enablers for success and for continuous improvement. The suggested framework will help to define and improve business policies and work procedures for the assets operation and maintenance along their life cycle. The following sections present some achievements on this focus, proposing finally possible future lines for a research agenda within this field of assets management
Index for asset value measure obtained from condition monitoring digitalized data interpretation. A railway asset management application
Hosted by the Johannes Kepler University, Linz, Austria. May 23-24, 2019The objective of any asset is to provide value to the organization, being the corner
stone to get a highest possible economic benefit in a sustainable way. An effective
asset value management demands method that allow measuring and comparing the
expected value with the real value realized at any time during its life cycle for value
informed decision-making. Digitalization is providing new data about events and
states related to asset condition and risk, information that can be reinterpreted to
generate value measure strategies. This paper presents a proposal of TVO (Total
Value of Ownership) model where it is possible to quantify and measure the value, including its monitoring throughout the life cycle of the asset and/or system.
Proposed TVO model is focused on Safety, one of the most relevant value factors for
Industry and Infrastructure sectors. Asset events and states are intrinsically linked to
the defined failure modes. Consequently, it is necessary to structure the system
information around the failure modes that have been defined, in order to obtain a
value measurement index. A railway use case is presented
An approach to quantify value provided by an engineered asset according to the ISO 5500x series of standards
Asset Intelligence through Integration and Interoperability and Contemporary Vibration Engineering Technologies : Proceedings of the 12th World Congress on Engineering Asset Management and the 13th International Conference on Vibration Engineering and Technology of Machinery.
2-4 August 2017, Brisbane, AustraliaThe purpose of any asset is to provide value to the organization and its stakeholders. In Asset Management, the concept of value encompasses quantitative and qualitative, as well as tangible and intangible benefits that assets may provide to an organization. The definitions of asset and value are not only closely linked but also complementary. An “asset” provides the means for the realisation of “value” thus the management of an asset is strategic and has to be linked to an organization’s value norms. This paper extrapolates from the definitions in ISO 5500x series of standards to describe a generic approach for quantifying the value provided by engineered assets deployed by a business organisation.Unión Europea. 64573
Estación Biológica Roberto Zarruk, Universidad Centroamericana. Santa Maura, Jinotega, Nicaragua. Bosque de Nebliselva
La labor de la Estación, por el expreso deseo del donante, Ing. Jorge Armando Chaves Gutiérrez, es el estudio de la biodiversidad en el bosque tropical húmedo y su preservación y mantenimiento para el provecho de la población local y nacional, y de la ciencia en general. Se desea establecer un centro de investigación, educación, y adiestramiento para científicos, estudiantes, niños de escuela, campesinos, guardabosques y también ecoturistas que quieran conocer en primera instancia las maravillas y secretos de la selva tropical (Nebliselva)
Integrating complex asset health modelling techniques with continuous time simulation modelling: A practical tool for maintenance and capital investments analysis
Article number 103507An Asset Health Index (AHI) is a tool that processes data about asset’s condition. That index is intended
to explore if alterations can be generated in the health of the asset along its life cycle. These data can
be obtained during the asset’s operation, but they can also come from other information sources such
as geographical information systems, supplier’s reliability records, relevant external agent’s records, etc.
The tool (AHI) provides an objective point of view to justify, for instance, the extension of an asset useful
life, or to identify which assets from a fleet are candidates for an early replacement, or renovation, as a
consequence of a premature aging.
This paper describes how to build the AHI model as a continuous time simulation model, which is then
implemented using Vensim simulation environment. This is done in order to: 1) improve model formu lating robustness, 2) benefit of the outstanding software optimization features for AHI model parameters
calibration; and 2) easy the provision of predictions for asset degradation, operational and capital invest ments risk under different possible exogenous scenarios and endogenous managerial options.
The process of model building, and parameterization is applied to an industrial case of a regasification
terminal. Several strategies involving major maintenance scheduling are compared in terms of total
expenditure in assets over their life cycle
Criticality analysis for improving maintenance, felling and pruning cycles in power lines
16th IFAC Symposium on Information Control Problems in Manufacturing INCOM 2018
Bergamo, Italy, 11–13 June 2018.
Edited by Marco Macchi, László Monostori, Roberto PintoThis paper deals with the process of criticality analysis in overhead power lines, as a tool to improve maintenance, felling & pruning programs. Felling & pruning activities are tasks that utility companies must accomplish to respect the servitudes of the overhead lines, concerned with distances to vegetation, buildings, infrastructures and other networks crossings. Conceptually, these power lines servitudes can be considered as failure modes of the maintainable items under our analysis (power line spans), and the criticality analysis methodology developed, will therefore help to optimize actions to avoid these as other failure modes of the line maintainable items. The approach is interesting, but another relevant contribution of the paper is the process followed for the automation of the analysis. Automation is possible by utilizing existing companies IT systems and databases. The paper explains how to use data located in Enterprise Assets Management Systems, GIS and Dispatching systems for a fast, reliable, objective and dynamic criticality analysis. Promising results are included and also discussions about how this technique may result in important implications for this type of businesse
Cyber physical systems implementation for asset management improvement: A framework for the transition
Libro en Open AccessThe transformation of the industry due to recent technologies introduction is an evolving
process whose engines are competitiveness and sustainability, understood in its broadest sense (environmental,
economic and social). This process is facing, due to the current state of scientific and technological
development, a new challenge yet even more important: the transition from discrete technological solutions
that respond to isolated problems, to a global conception where the assets, plant, processes and engineering
systems are conceived, designed and operated as an integrated complex unit. This vision is evolving
besides a set of concepts that are, in some way, to guide this development: Smart Factories, Cyber-Physical
Systems, Factory of the Future or Industry 4.0, are examples. The full integration of the operation and
maintenance (O&M) processes in the production systems is a key topic within this new paradigm. Not
only that, this evolution necessarily results in the emergence of new processes and needs of O&M, i.e.
also, the O&M will undergo a profound transformation. The transition from actual isolated production
assets to such Industry 4.0 with CPS is far from easy. This document presents a proposal to develop such
transition adapting one iteration of the Model of Maintenance Management (MMM) integrated into
ISO 55000 to the complexity of incorporating “System of Systems” CPSs maintenance. It involves several
stages: identification, prioritization, risk management, planning, scheduling, execution, control, and
improvement supported by system engineering techniques and agile/concurrent project managemen
Strategic view of an assets health index for making long-term decisions in different industries
Libro en Open AccessAn Asset Health Index (AHI) is a tool that processes data about asset’s condition. That
index is intended to explore if alterations can be generated in the health of the asset along its life cycle.
These data can be obtained during the asset’s operation, but they can also come from other information
sources such as geographical information systems, supplier’s reliability records, relevant external agent’s
records, etc. The tool (AHI) provides an objective point of view in order to justify, for instance, the extension
of an asset useful life, or in order to identify which assets from a fleet are candidates for an early
replacement as a consequence of a premature aging. This paper develops a model applicable to different
classes of equipment and industrial sectors. A review of the main cases where the asset health index has
been applied is included. Likewise, advantages and disadvantages in the application of this kind of tools
are revealed, providing a guide for a research line related to the general application of this tool
Carbon dioxide adsorption in chemically activated carbon from sewage sludge
In this work, sewage sludge was used as precursor in the production of activated carbon by means of chemical activation with KOH and NaOH. The sludge-based activated carbons were investigated for their gaseous adsorption characteristics using CO2 as adsorbate. Although both chemicals were effective in the development of the adsorption capacity, the best results were obtained with solid NaOH (SBAT16). Adsorption results were modeled according to the Langmuir and Freundlich models, with resulting CO2 adsorption capacities about 56 mg/g. The SBAT16 was characterized for its surface and pore characteristics using continuous volumetric nitrogen gas adsorption and mercury porosimetry. The results informed about the mesoporous character of the SBAT16 (average pore diameter of 56.5 Å). The Brunauer-Emmett-Teller (BET) surface area of the SBAT16 was low (179 m2/g) in comparison with a commercial activated carbon (Airpel 10; 1020 m2/g) and was mainly composed of mesopores and macropores. On the other hand, the SBAT16 adsorption capacity was higher than that of Airpel 10, which can be explained by the formation of basic surface sites in the SBAT16 where CO2 experienced chemisorption. According to these results, it can be concluded that the use of sewage-sludge-based activated
carbons is a promising option for the capture of CO2.
Implications:
Adsorption methods are one of the current ways to reduce CO2 emissions. Taking this into account, sewage-sludge-based activated carbons were produced to study their CO2 adsorption capacity. Specifically, chemical activation with KOH and NaOH of previously pyrolyzed sewage sludge was carried out. The results obtained show that even with a low BET surface area, the adsorption capacity of these materials was comparable to that of a commercial activated carbon. As a consequence, the use of sewage-sludge-based activated carbons is a promising option for the capture of CO2 and an interesting application for this waste
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