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Fuzzy Information Processing Society Biannual Conference, 1994. Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic,

18-21 Dec. 1994

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Displaying Results 1 - 25 of 104
  • NAFIPS/IFIS/NASA '94. Proceedings of the First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (273 KB)
    Freely Available from IEEE
  • FSC system for tool breakage detection in end milling operations

    Publication Year: 1994, Page(s):132 - 135
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A fuzzy-net search classifier (FSC) system has been developed to control tool breakage in end milling operation based on fuzzy nets approach. The FSC system has the self-learning capability to generate rule bases and to fine tune the term sets of each linguist variables to the appropriate level of granularity. The performance of the FSC system is examined for an end milling operation View full abstract»

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  • Neurofuzzy symbolic systems and pattern recognition

    Publication Year: 1994, Page(s):421 - 422
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    It has been shown that information transmission from the pre to the post-synaptic neurons involves releasing specific pre-synaptic chemical messages (tokens) called transmitters (t) to binding defined post-synaptic molecules (tokens) called receptors (r). This t/r binding activates, in turn, some other postsynaptic molecules called controllers (c), whose purpose is to exercise some action upon the... View full abstract»

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  • The effect of fuzzy logic theory on a fuzzy sliding mode controller's performance

    Publication Year: 1994, Page(s):139 - 140
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    The impact of fuzzy number's characteristics over fuzzy logic controllers' (FLC's) performance is analyzed through different control scenarios of a fuzzy sliding mode controller applied to a benchmark control problem View full abstract»

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  • An adaptive fuzzy modeling framework for characterization of subsurface contamination

    Publication Year: 1994, Page(s):194 - 195
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    The objectives of characterization of subsurface contamination are to provide information for the evaluation of: (1) the environmental effects of these contaminants; and (2) alternate remediation measures. However, the procedure is very complex. Complete characterization is very time consuming and costly if not impossible. In this paper, we propose an adaptive fuzzy modeling framework for the char... View full abstract»

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  • A framework for object-oriented fuzzy expert systems

    Publication Year: 1994, Page(s):214 - 222
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    In recent years, the fuzzy logic has been widely used in the field of AI. Many successful fuzzy expert systems and fuzzy control systems have been developed. In general, these systems adopt the rule-based knowledge representation. On the other hand, it is also suitable to adopt the object-oriented paradigm for representing knowledge. This paper proposes a framework that integrates the fuzzy infere... View full abstract»

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  • A smart instrument to evaluate roofing system performance in hurricanes

    Publication Year: 1994, Page(s):275 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A recently developed decision support system to aid nonengineering professionals in evaluating the quality of roofing systems for commercial and residential buildings is described. A description of the requirements, theoretical background, and architecture of the system is provided. The accompanying computer program is also described. Finally, the predicted quality levels of thirteen roofing syste... View full abstract»

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  • Image thresholding via possibilistic clustering

    Publication Year: 1994, Page(s):423 - 426
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    In this paper, we introduce a new technique for gray-level thresholding based on the Possibilistic C-Means (PCM) algorithm. The PCM-based thresholding is compared with two other traditional thresholding techniques due to Otsu (1979) and Kullback (1959), and also with a technique based on the Fuzzy C-Means algorithm View full abstract»

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  • Fuzzy logic applied to voltage regulation

    Publication Year: 1994, Page(s):141 - 142
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    This paper presents a fuzzy controller for power conditioners (FCPC); this controller changes the phase angle of a bank of thyristors, which modifies the magnetic flux of an static voltage compensator, in order to obtain the desired output voltage regulation View full abstract»

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  • Fuzzy neural networks application for road vehicle energy consumption management

    Publication Year: 1994, Page(s):84 - 85
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    The energy consumption of road vehicles depends on many parameters, that cannot be taken into account by meant of the traditional analysis systems. The aim of this work is to compare the efficiency of Fuzzy Logic with that of traditional mathematical method, to determinate the road fuel consumption model by using only four measured variables of a vehicle driven in heavy city traffic conditions View full abstract»

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  • Learning control of an adaptive structural manipulator by fuzzy phase-lead compensation

    Publication Year: 1994, Page(s):237 - 242
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    This paper deals with a fuzzy learning control of an adaptive structural manipulator, which has a structure for changing the length of arms, with two degree of freedom. We apply fuzzy phase-lead compensation based on frequency domain to the manipulator. Simulation results show that compensation for the adaptive structural manipulator can be effectively realized by the learning control of the fuzzy... View full abstract»

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  • Fuzzy reasoning and genetic algorithms for decision making problems in uncertain environment

    Publication Year: 1994, Page(s):115 - 120
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In the present paper, genetic algorithms (GA) have been used to optimize the design of a generic expert system based on fuzzy logics. Using the classical branch-and-bound method, the latter performs a heuristic graph search to solve a decision-making problem under uncertain environment. After building this fuzzy expert system, we isolate a set of parameters which are important for the system effic... View full abstract»

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  • FLIC: fuzzy linear invariant clustering for applications in fuzzy control

    Publication Year: 1994, Page(s):196 - 200
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    We present a new method for fuzzy clustering which is useful for deriving Takagi-Sugeno type rules ”if x is Ak, then y=g k(x)“. Unlike the previous works, where the c-means algorithm is used first to form clusters with a single point center and then gk(x)'s are formed separately for each cluster, we form the clusters and their more general representativ... View full abstract»

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  • Implementing fuzzy constraints in a programming environment

    Publication Year: 1994, Page(s):322 - 325
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The central focus of this work is the investigation of the use of mathematical programming methods as a tool for implementing the reasoning (inference) in fuzzy logics. Since the general paradigm for reasoning in fuzzy logic is based upon the satisfaction of a conjunction of propositions represented as fuzzy (elastic) constraints, mathematical programming appears to provide a natural framework to ... View full abstract»

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  • Fuzzy logic for bridge rating using an eigenvector of priority settings

    Publication Year: 1994, Page(s):279 - 286
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    To avoid possible inconsistencies in the inspection and rating of highway bridges, a fuzzy inference model based on a priority setting obtained through the solution of an eigenvector problem invoking a pairwise comparison matrix of importance is presented. This method and the associated solution technique, originally developed for general use in multi-attribute decision making, are used to impleme... View full abstract»

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  • Physical system modeling using temporal fuzzy sets

    Publication Year: 1994, Page(s):429 - 433
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A family of temporal fuzzy sets is applied to modeling the dynamics of a physical system. The output trajectory of a physical process is decomposed through fuzzy partitioning into several patterns of dynamic activity. The membership functions are used in characterizing the extent to which the overall dynamics is governed by individual patterns. Simulated and real data examples are presented to ill... View full abstract»

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  • Autonomous vehicle following by a fuzzy logic controller

    Publication Year: 1994, Page(s):333 - 337
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    This paper presents a fuzzy logic for performing autonomous vehicle following which is defined as a vehicle controlling its own steering and speed while following a lead vehicle. This controller functions by first converting the range and heading angle observation into fuzzy variables, by executing fuzzy rules generated by a self-organizing neural network, and then by defuzzifying the resultant fu... View full abstract»

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  • Fuzzy intervals as a basis for measurement theory

    Publication Year: 1994, Page(s):405 - 406
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    We describe the problem of error estimation for indirect measurements, one of the main problems of measurement theory. We show why statistical approach is not always adequate, why interval and fuzzy approaches have their own problem, and propose a new paradigm: using fuzzy intervals as a basis for measurement theory View full abstract»

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  • Fuzzy environmental control of surgical rooms in hospitals

    Publication Year: 1994, Page(s):143 - 144
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    A surgical zone fuzzy environmental control is implemented for a typical hospital using a fuzzy controller which has been multiplexed for seven surgical rooms. This controller substitutes an On-Off manual control which simply opens or closes completely the air flow dampers permitting the pass of 100% or 0% fresh air to the rooms. Field tests have shown abilities of control for the fuzzy controller... View full abstract»

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  • Design of adaptive fuzzy controllers for nonlinear systems by input-output linearization

    Publication Year: 1994, Page(s):89 - 93
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    In this paper, we present a general procedure for designing adaptive fuzzy controllers for nonlinear systems based upon the input-output linearization concept, and apply the controller to the ball-and-beam system View full abstract»

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  • Fuzzy logic finite state machine models for real time systems

    Publication Year: 1994, Page(s):296 - 300
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Dynamic linguistic models can be implemented by fuzzy automata. In this paper the model of the fuzzy-state-fuzzy-output finite state machine (FSFO FSM) is discussed. The FSFO FSM is realized using the concepts of crisp-state-fuzzy-output FSM (CSFO FSM) and state membership functions (SMF). A systematic method is suggested to design the state transients of the FSFO FSM by means of a specified seque... View full abstract»

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  • Wind pattern recognition in neural fuzzy wind turbine control system

    Publication Year: 1994, Page(s):381 - 385
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    This paper introduces a new approach utilizing a fuzzy classifier and a modular temporal neural network to predict wind speed and direction for advanced wind turbine control systems. The fuzzy classifier estimates wind patterns and then assigns weights accordingly to each module of the temporal neural network. The finite-duration impulse response multiple-layer structure of the temporal network ma... View full abstract»

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  • Application of fuzzy control theory in active control of structures

    Publication Year: 1994, Page(s):243 - 247
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    The purpose of this paper is to apply fuzzy control theory in active structural control. A single-degree-of-freedom (SDOF) structure is used to develop the basic approach. The approach is then extended to multi-degree-of-freedom (MDOF) structures with the usage of weighted displacement and weighted velocity. A band-pass white noise is used as excitation to the structures to calculate the normalize... View full abstract»

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  • Commercial systems for fuzzy reasoning: a survey

    Publication Year: 1994, Page(s):121 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    We compare the fields of fuzzy process control and fuzzy reasoning, and conclude that software very suitable for process control may be at best marginally suitable for fuzzy reasoning. We discuss questions of system power and ease of use, and survey several commercial system in that light View full abstract»

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  • Building Sugeno-type models using fuzzy discretization and orthogonal parameter estimation techniques

    Publication Year: 1994, Page(s):201 - 206
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    This paper develops a new approach to building Sugeno-type models. The essential idea is to separate premise identification from consequence identification, while these are mutually related in the previous methods. A fuzzy discretization technique is suggested to determine the premise of the model, and an orthogonal estimator is provided to identify the consequence of the model. The orthogonal est... View full abstract»

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