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Eigenfrequency and deflection analysis of layered structure using uncertain elastic properties - a fuzzy finite element approach

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INTERNATIONAL JOURNAL OF APPROXIMATE REASONING 2018年 98卷 163-176页

作者： Patle, B. K. Hirwani, Chetan K. Singh, Ravi P. Panda, Subrata K. CVR Coll Engn Dept Mech Engn Hyderabad India Natl Inst Technol Dept Mech Engn Rourkela 769008 Odisha India

This is the first-time a higher-order fuzzy finite element model has been proposed and implemented to compute the laminated structural responses (modal frequency and static deflection) numerically including the uncertain elastic properties. The composite structure is modelled via a higher-order mid-plane theory which accounts the parabolic variation of the shear stress in conjunction with the fuzzified properties. The fuzzy arithmetic steps are implemented for the composite property evaluation via the triangular membership functions (alpha-cut method) and solved numerically via finite element techniques. The variational technique and the classical Hamilton's principle are utilized to derive the necessary structural governing equation of the laminated structure including the fuzzified properties. Subsequently, the frequency and the static deflection values are obtained computationally via an efficient home-made computer code (MATLAB environment) with the help of current higher-order finite element model. Further, different kinds of numerical examples are solved using the current higher-order fuzzified model to demonstrate the convergence and comparison behaviour. The differences between the available deterministic (3D-FEM and exact solution) and the uncertain (fuzzified) structural responses indicate the necessity of the current model including the accuracy level. Lastly, the influence of the individual and the combined effect of the material (fuzzified elastic property) and the geometrical parameters on the final structural responses are computed and inferred in details. (C) 2018 Elsevier Inc. All rights reserved.

关键词： Uncertain material property FFEM HSDT triangular membership function Frequency response Static deflection

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A New Paradigm For Generation Of Fuzzy membership function 8

A New Paradigm For Generation Of Fuzzy Membership Function

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IEEE 8th International Advance Computing Conference (IACC)

作者： Vaidya, Anagha V. Metkewar, Pravin S. Naik, Sachin A. Symbiosis Int SICSR Pune 411016 Maharashtra India

ISBN: (纸本)9781538666784

A membership function (MF) is a curve that defines how each point in the input space is mapped to a membership value (or degree of membership) between 0 and 1. The input space is sometimes referred to as the universe of discourse. This paper further develops the fuzzy-based algorithm to add the feature of automatic membership function generation in the fuzzy logic module of the algorithm. From this context, a short review of related work in membership function generation is given, and rules associated with it have been incorporated. In this paper, a one step ahead to the nature of the fuzzy logic-based design, a fitness finding method has been proposed. This paper also evaluates the proposed algorithm for deriving membership function based on association rule using control parameters with its implementation. The algorithm is applied by considering a case study of share market data and results are analyzed and compared with the intuitive cases

关键词： Association rules Decision tree Fuzzy Logic Intuitive cases triangular membership function

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Integrated Performance Assessment and Service Level Benchmarking of Urban Bus System using Fuzzy Logic

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EUROPEAN TRANSPORT-TRASPORTI EUROPEI 2018年第69期

作者： Jasti, Pradeep Chaitanya Ram, V. Vinayaka BITS Pilani Dept Civil Engn Hyderabad Campus Hyderabad 500078 India MMRCL Civil BKC 3rd FloorMMRCL BldgE Block Bombay 400051 Maharashtra India

Ever increasing personalized modal share in Indian urban scenario has resulted in multiple issues like congestion, delays, deteriorating ambient air quality and increased accident rates. Existing Public transportation systems are either falling short of meeting the travel needs or deemed ineffective owing to multiple factors. Ever increasing personalized vehicular ownership due to improving per capita income of the household is resulting in gradual drop in occupancy of public transportation systems like buses. This scenario is almost similar in all progressive cities in India. During the recent past, Urban Local Bodies (ULBs), State and Central Governments are exploring the option of introducing Mass Rapid Transit Systems (MRTS) to alleviate the above concerns. But, financial feasibility of such projects, demanding high capital investment, is a major bottleneck. However, societal benefits of these projects will pay off the investments during their life cycles. It is also important for the authorities to focus on developing sustainable cities which can maintain equilibrium in social, economic and environmental aspects. Opting for sustainable transportation planning would address the said objectives by adopting appropriate planning practices and policy analysis. Sustainable transport planning needs a good assessment of the current scenario and due to non-availability of such assessment mechanisms, it was felt necessary to develop a suitable and comprehensive assessment scheme that appraise the current scenario of existing public transport system with pre-defined Performance Indicators (PI) having its special emphasis on environment, economic, financial and social sectors. Further, an appropriate benchmarking process to carry out a bespoke performance assessment of urban bus system with sustainability as key node is also been developed. Augmenting the same, an Indicator based framework is developed with 30 evaluators nested under 8 Performance Indicators followed by a

关键词： Sustainable Benchmarking Urban Bus System Performance Evaluation Public Transportation Fuzzy Logic triangular membership function

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Design of Intelligent Air Conditioner Controller using Fuzzy Logic

Design of Intelligent Air Conditioner Controller using Fuzzy...

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International Conference on Innovations in Electrical Engineering and Computational Technologies (ICIEECT)

作者： Omer, S. Ahsan ur Rehman Muhammad, Ejaz HITEC Univ Taxila Taxila Pakistan

ISBN: (纸本)9781509033102

The paper presents the algorithm for intelligent air conditioner controller. This algorithm is based on fuzzy logic. The implementation is done on arduino based microcontroller with temperature and humidity as two inputs and power as output. Air conditioners based on such controller are more energy efficient as compared to conventional air conditioners. The experimental results have also shown the superiority of such controller.

关键词： Energy efficient control fuzzy inference system temperature and humidity sensor triangular membership function

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Chaotic behavior in love affairs of fractional order with fuzzy membership function as an external force 17

Chaotic behavior in love affairs of fractional order with fu...

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Joint 17th World Congress of International-Fuzzy-Systems-Association / 9th International Conference on Soft Computing and Intelligent Systems (IFSA-SCIS)

作者： Huang, Linyun Bae, Youngchul Chonnam Natl Univ Dept Biomed & Elect Engn Yeosu South Korea Chonnam Natl Univ Div Elect Elect Commun & Comp Engn Yeosu South Korea

ISBN: (纸本)9781509049172

This paper consider love affairs of fractional-order system with external force. To make chaotic behavior in the proposed fractional love model, we use fractional order differential equation that can be represented by Romeo and Juliet's love affairs. We also apply triangular membership function as an external force, which can be closely represented human action or wording. Finally to confirm the chaotic behavior of proposed fractional-order love affairs with triangular membership function, which order is less than 3, we use time series and phase plane with changing parameter value.

关键词： Fractional order Love model triangular membership function Romeo Juliet

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A Novel Analog Circuit Design and Test of a triangular membership function

A Novel Analog Circuit Design and Test of a Triangular Membe...

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The 2011 International Conference on Electric and Electronics (EEIC 2011)

作者： Weiwei Shan Yinchao Lu Huafang Sun Junyin Liu National ASIC System and Research Engineering Center Southeast University

In this paper, a novel analog design of a triangular membership function circuit is presented with a compact structure for hardware implementations of fuzzy-neural systems. This circuit is consisted of two simple transconductors and a current mode minimization circuit, which generates a linear triangular curve by getting the minimum part of two properly set transconductors. The characteristics(width, height, slope and position) are easy to adjust. This triangular MFC was realized in 0.6μm CMOS technology and tested with an output signal of a high precision and a high speed of 20 MHz, showing that it is suitable for real-time applications.

关键词： fuzzy logic triangular membership function analog circuit

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Comparison between Type-1 Fuzzy membership functions for Sign Language Applications

Comparison between Type-1 Fuzzy Membership Functions for Sig...

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International Conference on Microelectronics, Computing and Communications (MicroCom)

作者： Saha, Sriparna Bhattacharya, Saurav Konar, Amit Jadavpur Univ Elect & Telecommun Engn Dept Kolkata India

ISBN: (纸本)9781467366212

The paper presents a comparison between different membership functions based type-1 fuzzy set for automatic hand gesture recognition for American Sign Language recognition. First pre-processing of the images is done using skin color based segmentation, morphological operations and to extract the hand gesture image from the background, Sobel edge detection technique is performed. Then the image is sub-divided into 9 quadrants and for each quadrant, the area enclosed by the image in that specific quadrant is calculated. Based on areas from 15 images for a particular quadrant, the Gaussian three membership curves triangular, trapezoidal and Gaussian are designed. Now for an unknown gesture, nine membership values are determined and the summation of these membership values produces the strength of the unknown hand gesture matched with a known gesture. The highest strength obtained for a known gesture is the desired result. Experimentally, it is found that trapezoidal membership function outperforms the other two membership functions and gives overall an accuracy of 85.83%.

关键词： Gaussian membership function triangular membership function trapizoidal membership function type-1 fuzzy set sign language probability

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A New Mathematical Model in Image Enhancement Problem

A New Mathematical Model in Image Enhancement Problem

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International Conference on Information and Communication Technologies (ICICT)

作者： Gopalan, Sasi Arathy, S. Cusat Sch Engn Kochi 682022 Kerala India

In this problem a new mathematical model for image enhancement is developed in fuzzy domain. The triangular membership function is used for fuzzification which reduces the number of parameters for optimisation of the model. Image enhancement has been done using sigmoid operators whose parameters are found by optimisation of entropy and visual factor using simulated annealing. The cross over point is chosen as the membership function corresponding to average intensity level. Scaling is an important part of this model to avoid the discontinuity arising from division of intensity levels. (C) 2015 Published by Elsevier B.V.

关键词： triangular membership function sigmoid function simulated annealing

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Comparison between Type-1 Fuzzy membership functions for Sign Language Applications

Comparison between Type-1 Fuzzy Membership Functions for Sig...

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International Conference on Microelectronics, Computing and Communications

作者： Sriparna Saha Saurav Bhattacharya Amit Konar Electronics & Tele-Communication Engineering Department Jadavpur University Kolkata India

ISBN: (纸本)9781467366229