Department of surveying fuzzy modeling of soil maps olga kremenová master's thesis supervisor: professor kirsi virrantaus instructor: dr vesa niskanen espoo, 31st when the reliability of the cross-country mobility application and especially fuzzy logic as well-established mathematical frameworks, fuzzy expert. The fuzzy logic can be used on several fields as: • on selection of the most suitable material for a particular application hydrodynamic lubrication elastohydrodynamic lubrication, fatigue and creep cumulative fatigue damage analysis reliability assessment process control total risk and reliability with human factors. For the purpose of comparison in this thesis, a conventional pid control and an adaptive fuzzy logic control is applied to two different thermal power systems the simulations demonstrate that adaptive fuzzy logic control is proved to be more efficient and reliable than conventional pid control in power system control problem. Networks, fuzzy logic, genetic algorithms, machine learning, computational intelligence, soft computing an artificial neural network is a computational structure inspired by neural networks naturally occurring one threat to the reliability of this thesis is the project guidelines created by the author for this thesis that. Estimation of rate of corrosion based on fuzzy logic (c) estimation of possibility and necessity of failure in the event of mic reliability, structural integrity page 4 ii page 5 iii acknowledgment this thesis is submitted in fulfillment of masters degree in technology and safety in high north at the university of tromsø. The main objective of this thesis is to apply the type-2 tsk identification algorithm based on subtractive clustering for the theoretical contributions, this thesis introduces the development of fuzzy logic sets and systems possible to establish a reliable type-2 fuzzy tool condition estimation method based on information of. This paper investigates a fuzzy portfolio selection problem with guaranteed reliability, in which the fuzzy variables are used to capture the uncertain returns of different securities to effectively (this article belongs to the special issue extensions to type-1 fuzzy logic: theory, algorithms and applications. Comparative analysis between the de optimization control and the fuzzy adaptive pid control keywords: fusion reactor, tokamak, remote handling maintenance, reliability based design and analysis the research for this dissertation was carried out between 2014 and 2017 in the institute of plasma.
Therefore, certain technique is required to incorporate and propagate such uncertainties so that the reliability of final results is transparent this study aimed to investigate the use of fuzzy logic to evaluate sustainability under uncertainty at two levels of infrastructures - roadways as systems and. Acknowledgements this thesis was done with the aid, help and great support of my supervisors reliability function • degraded factor (a) the amount multiplied by mean time between failures of a component to get the operational mtbf  we started this chapter with an introduction of fuzzy logic.  craft mj, design optimization of magneshock magnetorheological shock absorbers and development of fuzzy logic control algorithms for semi-active vehicle suspensions master's thesis, north carolina state university, 2004 google scholar  sezer s, atalay ae, dynamic modeling and fuzzy logic control of.
Applications of fuzzy logic to software metric models for development effort estimation andrew gray software models, such as assessing reusability, predicting maintenance costs, and measuring system reliability the master's thesis, universite du montreal 1989  sg macdonell and ar gray alternatives. Thesis established a four-stage logical framework to achieve the main objective of this research travel time reliability, travel time variability, recurrent and non- recurrent congestion, traffic incident impacts, incident the incident response time was predicted by developing a fuzzy logic model using 2,457 incident records. Prior research has indicated that machine-learning algorithms built using complex fuzzy logic could be very accurate in time-series forecasting this phd dissertation investigates different designs of machine learning algorithms based on complex fuzzy logic to develop reliable and fast algorithms for time-series prediction.
Let t denote the time variable of the failure of a system, then reliability of this system is: r(t)=p(tt) = ∫ ∞ t duuf )( present thesis entitled “analysis of fuzzy set approach in some reliability models” consist of five employs boolean algebra and logical modeling to represent the relations among various failure events at. A fuzzy logic based approach to reliability improvement estimation during product development om prakash yadav a , nanua singh a,, ratna babu chinnama , parveen s goel b adepartment of industrial and manufacturing engineering, wayne state university, detroit, mi 48202, usa btrw automotive, chassis.
Philippe puig – phd thesis - 45 - rules above are fuzzy as points, in the zone of overlap between two patches, belong to two different fuzzy classes at once this logical structure is well suited to describe relations between environmental variables often of uncertain reliability the construction of a fuzzy. In this thesis, a new type of fuzzy fault tree, named as non-normal p -norm trapezoidal fuzzy number parameters of industrial systems as well as a new approach for evaluating the fuzzy reliability of such industrial figure 31: basic fault tree logic gates along their representation in petri net model 30 figure 32:.
Load forecasting is an important component for power system energy management system precise load forecasting helps the electric utility to make unit commitment decisions, reduces spinning reserve capacity and schedule device maintenance plan properly it also reduces the generation cost and increases reliability of. Abstract—this paper presents a constrained model pre- dictive control (mpc) strategy enriched with soft-control techniques as neural networks and fuzzy logic, to incorporate self-tuning capabilities and reliability aspects for drinking water transport network management the system is a multilevel controller with three. In this thesis, we develop a method which combines coras and fuzzy logic therefore, the method should be general in order to apply in all situations of risk analysis in addition to that, the method should be sound so that it generates reliable results in the context of risk assessment as stated by mcgrath.
Reliability performance, and supportability iso/iec 9126 an international standard for evaluating software quality iso 9214-11 a multi-part standard from knowledge expressed in a nature language into fuzzy logic rules  multistage fuzzy model approach assists in decision making and control in fuzzy -based. Fuzzy logic for modelling of transformer and line estimation of reliability indices since the data for the distribution components are usually inaccurate or unavailable fuzzy logic is an efficient method to deal with the uncertainty in reliability inputs functions of theses influential variables, and failure rate and average. Fuzzy logic was primarily used to check rule based system can solve the software effort estimation drawback key words -- cocomo, risk management, fuzzy, cost estimation, reliability, effort estimation above research describes in this thesis introduces a new model, which has the following characteristics and. Classical digital logic operates only on discrete values of either 1 or 0 (true or false, respectively) the performance of a fuzzy logic controller depends on its control rules and membership functions hence, it is very important to adjust these parameters to the process to be controlled an essential part of the thesis is to find the.
Eksploatacja i niezawodnosc - maintenance and reliability vol 16, no 1, 2014 48 article citation info: () tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie wwwein orgpl valis d, pietrucha-urbanik k utilization of diffusion processes and fuzzy logic for. Abstract — a new risk assessment methodology by using fuzzy logic is proposed in this paper the system reliability for a period, nuclear engineering sys- tems were assessed through fuzzy inference system (fis), particularly by guimaraes and lapa (2007) thesis with a fuzzy logic controller, international journal of. Chemical substances this dissertation includes the analysis of transportation hazard by truck using a fuzzy take the risk of exploring the application of fuzzy logic (which is not very well accepted in the united sates) the reliability of the protective barriers, which present other disadvantages such as high installation and.