نتایج جستجو برای: fuzzy reliability index

تعداد نتایج: 616718  

2016
Pervaiz Iqbal

Assessment of reliability analysis of paper plant with fuzzy logic technique has carried out in this paper. Fuzzy Weibull distribution and lifetime of a component is also determined. The paper plant is a complex system under consideration which consists of various subsystems such as chipping, feeding, pulp preparation, washing, screening, bleaching and paper production etc. The mathematical mod...

Journal: :international journal of civil engineering 0
sung-hoon an dept. of architectural engineering, daegu univ., jillyang, gyoengsan-si, gyeongsangbuk-do 712-714, republic of korea hunhee cho school of civil, environmental and architectural engineering, korea univ., 5ga, anam-dong, sungbuk-gu, seoul 136-701, republic of korea ung-kyun lee school of civil & envirnmental engineering, oklahoma state univ., stillwater, ok 74078, usa

in the early stages of a construction project, the reliability and accuracy of conceptual cost estimates are major concerns for clients and cost engineers. previous studies applied scoring methods and established common rules or mathematical methods to assess the quality of cost estimates. however, those approaches have some limitations in adapting to real-world projects or require understandin...

2012
Tina Geweniger Marika Kaden Mandy Lange Thomas Villmann

We propose an extension of the Conn-Index to evaluate fuzzy cluster solutions obtained from fuzzy prototype vector quantization, whereas the original Conn-Index was designed for crisp vector quantization models. The fuzzy index explicitly takes the fuzzy assignments resulting from fuzzy vector quantization into account. This avoids the information loss which would occur if the original crisp in...

2011
Ankur Gupta Aziz Ahmad Amit Kumar

This paper deals with the development of different control techniques such as Fuzzy, Sliding mode, and Sliding Mode fuzzy controllers for the servo drive system. Servomotors are widely used in industry due to their relatively low cost and high reliability. To get high performances we have to control the input variable in uncertainties and disturbance. Two cases are discussed for each control sc...

2012
Sung - Hun Lee

Reliability Centered Maintenance(RCM) is one of most widely used methods in the modern power system to schedule a maintenance cycle and determine the priority of inspection. In order to apply the RCM method to the Smart Grid, a precedence study for the new structure of rearranged system should be performed due to introduction of additional installation such as renewable and sustainable energy r...

2013
Michael Mutingi

System reliability optimization is often faced with imprecise and conflicting goals such as reducing the cost of the system and improving the reliability of the system. The decision making process becomes fuzzy and multi-objective. In this paper, we formulate the problem as a fuzzy multi-objective nonlinear program (FMOOP). A fuzzy multiobjective genetic algorithm approach (FMGA) is proposed fo...

Journal: :Robotica 2021

SUMMARY This paper aims at developing a novel method to assess the kinematic reliability of robotic manipulators based on fuzzy theory. The quantifies probability obtaining positioning errors within acceptable limits. For this purpose, evaluates effect joint clearances end-effector position compute failure possibility index. As an alternative conventional methods reported in literature, index c...

Journal: :journal of industrial engineering, international 2011
s sardar donighi s khanmohammadi

fuzzy set based methods have been proved to be effective in handling many types of uncertainties in different fields, including reliability engineering. this paper presents a new approach on fuzzy reliability, based on the use of beta type distribution as membership function. considering experts' ideas and by asking operators linguistic variables, a rule base is designed to determine the level ...

2015
Ana Belén Ramos-Guajardo María José González-López Ignacio Gonzalez Ruiz

The reliability of the fuzzy scale for assessing the responses of a person in an opinion questionnaire (which is usually treated as a Likert-type questionnaire) is analyzed. Thus, a comparison between a classical Likert scale-based questionnaire and its fuzzy rating scale-based version in terms of their reliability is established. For this purpose, some questions of the Grasha-Riechmann student...

2009
Christophe Simon Philippe Weber Christophe SIMON Philippe WEBER

This article deals with an implementation of probist reliability problems in evidential networks to propagate imprecise probabilities expressed as fuzzy numbers. First, the problem of imprecise knowledge in reliability problems is described concerning system and data reprsentation. Then, the basics of the evidence theory and its use in a directed acyclic graph approach are given. The imprecise ...

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