Maintenance cost optimization for multiple components using a condition based method

2015 ◽  
Author(s):  
Leonardo Ramos Rodrigues ◽  
Ivo Paixao de Medeiros ◽  
Christian Strottmann Kern
Keyword(s):  
Cost Optimization ◽  
Maintenance Cost ◽  
Multiple Components

scholarly journals Preventive maintenance of multiple components for hydraulic tension systems

2021 ◽  
Vol 23 (3) ◽  
pp. 489-497
Author(s):  
Hongyan Dui ◽  
Xiaoqian Zheng ◽  
Qian Qian Zhao ◽  
Yining Fang
Keyword(s):  
Working Conditions ◽  
Preventive Maintenance ◽  
Conveyor Belt ◽  
Tension Force ◽  
Maintenance Cost ◽  
Number Of Components ◽  
Multiple Components ◽  
Conveyor Belts ◽  
The Cost

Automatically controlled hydraulic tension systems adjust the tension force of a conveyor belt under different working conditions. Failures of an automatically controlled hydraulic tension system influence the performance of conveyor belts. At present, the maintenance of automatically controlled hydraulic tension systems mainly considers the replacement of components when failures occur. Considering the maintenance cost and downtime, it is impossible to repair all the failed components to improve the hydraulic tension system. One of the key problems is selecting the most valuable components for preventive maintenance. In this paper, preventive maintenance for multiple components in a hydraulic tension system is analyzed. An index is proposed to select more reliable preventive maintenance components to replace the original ones. A case study is given to demonstrate the proposed method. When the cost budget increases, there are three different variations in the number of components for selective preventive maintenance (SPM).

scholarly journals Soil bioengineering in northeastern Brazil: An Overview

2021 ◽  
Vol 16 (4) ◽  
pp. 1
Author(s):  
Francisco Sandro Rodrigues Holanda ◽  
Renisson Neponuceno de Araújo Filho ◽  
Alceu Pedrotti ◽  
Bradford Paul Wilcox ◽  
Regina Helena Marino ◽  
...  
Keyword(s):  
Native Species ◽  
Cost Optimization ◽  
Research Work ◽  
Northeastern Brazil ◽  
Maintenance Cost ◽  
Native Flora ◽  
Soil Bioengineering ◽  
Local Materials ◽  
Bioengineering Techniques

This article presents an overview of the application of soil bioengineering techniques, also modeled as natural engineering, in the state of Sergipe, northeastern Brazil, showing the importance of integrating living and inert elements to protect river banks from erosion. The employed techniques are different, ranging from the characterization of susceptibility to erosion to the use of biotechniques, considering knowledge in the areas of agronomic engineering, forestry engineering, civil engineering, biology, pedology, geology, geomorphology and geotechnics. It is an approach that uses techniques and methodologies in a multidisciplinary way, seeking to maximize synergies (for example, natural engineering techniques to combine inert materials in ways that help plants to develop increasingly efficient systems). This approach also considers maintenance-cost optimization in the conduction of the works, using different materials, differing from traditional engineering, which uses predominantly inert materials. The research work carried out in different locations sought the availability of local materials such as rocks, geotextiles made from fibers from the native flora or even available on the market, in addition to the use of native species to recovery of the banks or slopes, according to the ecological conditions of the northeastern Brazil. Size and technological and ecological reach were also considered, in addition to different biotechnical aesthetic objectives adapted to different situations.

scholarly journals Reliability allocation of rotary ultrasonic vibration-assisted EDM machine tool based on maximum entropy ordered weighted average and constraint under the index of overall cost

2021 ◽  
Author(s):  
Minggang Xu ◽  
Hao Fu ◽  
Wang Tian ◽  
Binbin Lyu ◽  
Zihao Jiang ◽  
...  
Keyword(s):  
Machine Tool ◽  
Maximum Entropy ◽  
Ultrasonic Vibration ◽  
Cost Optimization ◽  
Weighted Average ◽  
Effective Control ◽  
Maintenance Cost ◽  
Optimum Number ◽  
Maintenance Cycle ◽  
Ordered Weighted Average

Abstract Rotary ultrasonic vibration-assisted EDM is a composite machining method which uses EDM technology to process metal surface and adds rotation and ultrasonic vibration. In this paper, the failure rate of each module of the rotary ultrasonic vibration-assisted EDM machine tool can be accurately predicted by the maximum entropy ordered weighted average algorithm so that the corrected maintenance cost can be predicted. And effective control of preventive maintenance costs can be achieved by selecting the best maintenance times under the premise of reliability. The results showed that the reliability of rotary ultrasonic vibration-assisted EDM machine tool is smoother at non-fixed maintenance intervals by varying the maintenance interval according to the comparison between non-fixed and fixed maintenance cycle. The cost of corrective maintenance can be reduced by varying the measurement to achieve cost optimization in the context of reliability with an optimum number of maintenance cycles and reliability.

scholarly journals Optimization of fleet maintenance cost on the basis of Piła’s Public Transportation Company

2018 ◽  
Vol 19 (6) ◽  
pp. 442-446
Author(s):  
Piotr Gorzelańczyk ◽  
Adam Koczorowski
Keyword(s):  
Cost Analysis ◽  
Public Transportation ◽  
Cost Optimization ◽  
Maintenance Cost ◽  
Petrol Station ◽  
Transportation Company

The article concerns the costs related to maintaining the transport fleet of Piła’s Public Transportation Company. The first part describes the Company itself. The second part was based on the data provided in the article “Transportation fleet maintenance cost analysis on the example of Piła’s Public Transportation Company” and prepared a fleet cost optimization plan. It proposed the reduction of fuel purchase by organizing an on-site petrol station as well as replacement of buses generating the largest costs. The study also described the proposal of obtaining founds for purchase of new buses.

RAID 60 Storage Reliability and Cost Optimization Using Weibull Distribution and Cuckoo Search Algorithm with Lévy Flights

2018 ◽  
Vol 9 (3) ◽  
pp. 13-39
Author(s):  
Mhamed Zineddine ◽  
Adel Akaaboune
Keyword(s):  
Weibull Distribution ◽  
Search Algorithm ◽  
Storage System ◽  
Cost Optimization ◽  
Cuckoo Search ◽  
Cuckoo Search Algorithm ◽  
Maintenance Cost ◽  
Time To Failure ◽  
Storage Devices ◽  
Complex Architectures

This article describes how in this digital age, storage devices have been permitting the design of systems with the capacity to handle massive amount of diverse types of data. Real-time storage devices have been using complex architectures to accommodate the exponential increase of generated content. Hard drives have been at the core of most of storage systems. Estimating the reliability and the time to failure of such devices will be of great value. Weibull distribution has been widely used to assess the reliability of many systems. In this article, the three parameter Weibull distribution and Cuckoo search algorithm are combined to optimize the reliability and the maintenance cost of a RIAD 60 storage system. The numerical results show that using the proposed approach in this article, a RAID 60 system could reach its optimal reliable state by swapping less reliable drives by others more (used or new) reliable, whichever, is optimal according to the sought-after reliability threshold.

scholarly journals Reliability-Based Opportunistic Maintenance Modeling for Multi-component Systems with Economic Dependence under Base Warranty

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Rongcai Wang ◽  
Zhonghua Cheng ◽  
Enzhi Dong ◽  
Chiming Guo ◽  
Liqing Rong
Keyword(s):  
Production System ◽  
Cost Optimization ◽  
Economic Losses ◽  
Maintenance Cost ◽  
Economic Dependence ◽  
Opportunistic Maintenance ◽  
Component Systems ◽  
Important Solution ◽  
Optimal Maintenance ◽  
Warranty Cost

Maintenance usually plays a key role in controlling a multi-component production system within normal operations. Furthermore, the failure of components in the production system will also cause large economic losses for users due to the shutdown. Meanwhile, manufacturers of the production system will be confronted with the challenges of the warranty cost. Therefore, it is of great significance to optimize the maintenance strategy to reduce the downtime and warranty cost of the system. Opportunistic maintenance (OM) is a quite important solution to reduce the maintenance cost and improve the system performance. This paper studies the OM problem for multi-component systems with economic dependence under base warranty (BW). The irregular imperfect preventive maintenance (PM) is performed to reduce the failure rate of components at a certain PM reliability threshold. Moreover, the OM optimization model is developed to minimize the maintenance cost under the optimal OM reliability threshold of each component. A simulated annealing (SA) algorithm is proposed to determine the optimal maintenance cost of the system and the optimal OM threshold under BW. Finally, a numerical example of a belt conveyor drive device in a port is introduced to demonstrate the feasibility and advantages of the proposed model in maintenance cost optimization.

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