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IEEE Transactions on Fuzzy Systems

Issue 5 • Date Oct 1999

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Displaying Results 1 - 12 of 12
  • Analysis and design of hierarchical fuzzy systems

    Publication Year: 1999, Page(s):617 - 624
    Cited by:  Papers (124)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    In this letter, the hierarchical fuzzy systems are analyzed and designed. In the analysis part, we prove that the hierarchical fuzzy systems are universal approximators and analyze the sensitivity of the fuzzy system output with respect to small perturbations in its inputs. In the design part, we derive a gradient descent algorithm for tuning the parameters of the hierarchical fuzzy system to matc... View full abstract»

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  • Parametric classes of generalized conjunction and disjunction operations for fuzzy modeling

    Publication Year: 1999, Page(s):586 - 596
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    It is argued that inference procedures of fuzzy models do not always require commutativity and associativity of the operations used. This raises the possibility of considering nonassociative and noncommutative conjunction and disjunction operations. Such operations are investigated in this paper and different methods for their generation are proposed. A number of new types of conjunction operation... View full abstract»

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  • Higher order fuzzy control structure for higher order or time-delay systems

    Publication Year: 1999, Page(s):540 - 552
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Attempts to develop new structures for higher order fuzzy logic control (FLC) systems, which could handle the higher order process and the time-delay system as well. Two different approaches are proposed to construct the higher order FLC, namely, the hierarchical structure and the distributed structure. Both structures can be designed via the theory of variable structure control (VSC). The complex... View full abstract»

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  • A contextual fuzzy cognitive map framework for geographic information systems

    Publication Year: 1999, Page(s):481 - 494
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Designing a system that is able to make use of quantitative and qualitative data for real world applications is a challenging problem. Traditional systems produce representational descriptions that are often not very useful to the human expert. To rectify this problem we propose a structure based on contextual fuzzy cognitive maps (CFCMs) for geographic information systems (GISs). Our framework bu... View full abstract»

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  • Fuzzy system parameters discovery by bacterial evolutionary algorithm

    Publication Year: 1999, Page(s):608 - 616
    Cited by:  Papers (83)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    This paper presents a new method for discovering the parameters of a fuzzy system; namely, the combination of input variables of the rules, the parameters of the membership functions of the variables, and a set of relevant rules from numerical data using the newly proposed bacterial evolutionary algorithm (BEA). Nawa et al. (1997) proposed the pseudobacterial genetic algorithm (PBGA) that incorpor... View full abstract»

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  • Robustness design of nonlinear dynamic systems via fuzzy linear control

    Publication Year: 1999, Page(s):571 - 585
    Cited by:  Papers (291)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    This study introduces a fuzzy linear control design method for nonlinear systems with optimal H robustness performance. First, the Takagi and Sugeno fuzzy linear model (1985) is employed to approximate a nonlinear system. Next, based on the fuzzy linear model, a fuzzy controller is developed to stabilize the nonlinear system, and at the same time the effect of external disturbanc... View full abstract»

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  • New methodology for analytical and optimal design of fuzzy PID controllers

    Publication Year: 1999, Page(s):521 - 539
    Cited by:  Papers (126)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Describes a methodology for the systematic design of fuzzy PID controllers based on theoretical fuzzy analysis and, genetic-based optimization. An important feature of the proposed controller is its simple structure. It uses a one-input fuzzy inference with three rules and at most six tuning parameters. A closed-form solution for the control action is defined in terms of the nonlinear tuning param... View full abstract»

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  • Perturbation of fuzzy reasoning

    Publication Year: 1999, Page(s):625 - 629
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    We propose the concepts of maximum and average perturbations of fuzzy sets and estimate maximum and average perturbation parameters for various methods of fuzzy reasoning View full abstract»

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  • Stability issues on Takagi-Sugeno fuzzy model-parametric approach

    Publication Year: 1999, Page(s):597 - 607
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The main objective of this research is to provide a systematic stability analysis technique for fuzzy systems using well-established results from robust stability of a family of polynomials. The model-based Takagi-Sugeno (1985) fuzzy control system is considered and shown to have a dependent coefficient structure involving firing strengths. Two Kharitonov regions via overbounding are established t... View full abstract»

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  • VLSI hardware architecture for complex fuzzy systems

    Publication Year: 1999, Page(s):553 - 570
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents the design of a VLSI fuzzy processor, which is capable of dealing with complex fuzzy inference systems, i.e., fuzzy inferences that include rule chaining. The architecture of the processor is based on a computational model whose main features are: the capability to cope effectively with complex fuzzy inference systems; a detection phase of the rule with a positive degree of act... View full abstract»

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  • Contextual fuzzy cognitive map for decision support in geographic information systems

    Publication Year: 1999, Page(s):495 - 507
    Cited by:  Papers (58)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Fuzzy cognitive maps or FCMs have been shown to be useful when representing qualitative data. We have shown that these FCM structures can be used to represent quantitative and qualitative data. We illustrate this structure applied to geographic information system (GIS) applications. We illustrate the types of CFCMs we can generate using real census data, human expert knowledge, and quantitative da... View full abstract»

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  • Stability analysis of nonlinear multivariable Takagi-Sugeno fuzzy control systems

    Publication Year: 1999, Page(s):508 - 520
    Cited by:  Papers (74)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Points out how the nonlinearities involved in multivariable Takagi-Sugeno (T-S) fuzzy control systems could originate complex behavior phenomena, such as multiple equilibrium points or limit cycles, that cannot be detected using conventional stability analysis techniques. In the paper, the application of MIMO frequency-domain methods to predict the existence of multiple equilibria and of limit cyc... View full abstract»

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Aims & Scope

The IEEE Transactions on Fuzzy Systems (TFS) is published bimonthly. TFS will consider papers that deal with the theory, design or an application of fuzzy systems ranging from hardware to software.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Chin-Teng Lin
National Chiao-Tung University
Hsinchu 30010, Taiwan 
ctlin@mail.nctu.edu.tw
Phone: 886-3-5731753
Fax: 886-3-5727382