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[1992 Proceedings] IEEE International Conference on Fuzzy Systems

8-12 March 1992

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Displaying Results 1 - 25 of 168
  • Fuzzy control: Principles, practice and perspectives

    Publication Year: 1992
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (42 KB)

    Summary form only given. It is known that fuzzy control is the most successful application of the fuzzy logic. The reasons for this success were explored in a brief survey of the history of the fuzzy control. Some practical examples of fuzzy control were reviewed. Advanced fuzzy control topics such as structured control and intelligent control were discussed. A stability analysis of a fuzzy contro... View full abstract»

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  • Adaptive fuzzy logic control

    Publication Year: 1992, Page(s):407 - 414
    Cited by:  Papers (11)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (487 KB)

    A systematic design procedure for fuzzy linguistic controllers with adaptive or learning capability is introduced. The design is based on stability and hierarchy of identification and control. The fuzzy rule-base is stored in a fuzzy hypercube and the fuzzy control action is computed via a fuzzy inference mechanism. Initial conditions for the elements of a fuzzy hypercube are obtained by an offlin... View full abstract»

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  • IEEE International Conference on Fuzzy Systems (Cat. No.92CH3073-4)

    Publication Year: 1992
    Request permission for commercial reuse | PDF file iconPDF (28 KB)
    Freely Available from IEEE
  • Interpolative reasoning in fuzzy logic and neural network theory

    Publication Year: 1992
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (43 KB)

    Summary form only given. Interpolative reasoning plays a key role in both fuzzy logic and neural network theory. The basic approaches to interpolative reasoning in both fuzzy logic and neural networks were surveyed, and their differences and similarities were analyzed. An important issue in interpolative reasoning in fuzzy logic relates to the solution of a system of fuzzy algebraic equations. Var... View full abstract»

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  • Fuzzy second-generation expert system design for IE/OR/MS

    Publication Year: 1992, Page(s):779 - 786
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Limitations on the representation of knowledge, and hence the inference methods, naturally limit the domains of the first-generation expert systems. In response to these limitations, fuzzy expert systems or the second-generation of expert systems provide two essential and unique advantages in the design, development, and implementation of expert systems: (1) fuzzy knowledge representation and (2) ... View full abstract»

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  • Precision control of refinery feed-heater temperature using fuzzy algorithm

    Publication Year: 1992, Page(s):859 - 866
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The authors present an easily implementable control strategy using a fuzzy algorithm for refinery feed-heater temperature control. The feed-heater exhibits large amounts of transportation lag making all conventional control methods inadequate. A fuzzy algorithm for real-time implementation was successfully developed and tested using a process model on an IBM PC. This fuzzy control algorithm is bas... View full abstract»

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  • An electronic video camera image stabilizer operated on fuzzy theory

    Publication Year: 1992, Page(s):851 - 858
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    An electronic video camera image stabilizer was developed. It eliminates a substantial part of the image instability caused by the involuntary movement of camera holders. The discrimination between image movement caused by unstable hand-holding and that of moving objects becomes possible by developing the following process: (1) dividing the image taken by the camera into four regions, (2) providin... View full abstract»

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  • Evolutive fuzzy neural networks

    Publication Year: 1992, Page(s):493 - 500
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The authors describe the combination of fuzzy neural networks with genetic algorithms, producing a flexible and powerful learning paradigm, called evolutive learning. Evolutive learning combines as complementary tools both inductive learning through synaptic weight adjustment and deductive learning through the modification of the network topology to obtain the automatic adaptation of system knowle... View full abstract»

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  • Fuzzy logic control of AC induction motors

    Publication Year: 1992, Page(s):843 - 850
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Simulated results of a microprocessor-based fuzzy logic motor controller (FLMC) are described. The investigation includes a motor stator voltage control scheme to minimize motor input power at specified speed/torque conditions, simulation of AC motor performance, and development of a FLMC for optimized motor efficiency. Simulated FLMC results compared favorably with other motor control approaches.... View full abstract»

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  • Fuzzy geometry: An overview

    Publication Year: 1992, Page(s):113 - 117
    Cited by:  Papers (19)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The author briefly reviews work on the fuzzy topology and geometry of image subsets, including adjacency, separation, and connectedness; distance and relative position; area, perimeter, and diameter; convexity and starshapedness; and medial axes and thinning View full abstract»

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  • On aggregation of max-product transitive valued binary relations

    Publication Year: 1992, Page(s):1245 - 1252
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    An aggregation procedure assigns a group preference to each finite family of individual preferences. It is usually required that the group preference satisfy some general conditions. One of the most commonly accepted conditions is the Pareto property. A special class of individual preferences represented by valued binary relations on the relevant finite set of alternatives is considered. Two extre... View full abstract»

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  • An algorithm for automated fuzzy logic controller tuning

    Publication Year: 1992, Page(s):615 - 622
    Cited by:  Papers (29)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    An automated method for calibrating a fuzzy logic controller (FLC) has been developed based on the cell state-space concept. The system's state space is quantized into cells creating a spatially discrete model of system behavior. Given a cost function and plant simulation model, a cell-state-space-based optimal control algorithm generates a table of desired control actions. The control table provi... View full abstract»

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  • Extending Boolean information retrieval: a fuzzy model based on linguistic variables

    Publication Year: 1992, Page(s):769 - 776
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    In information retrieval systems the vagueness in user requests for information is mainly managed by the use of numeric weights present the formal definition of a retrieval model in which linguistic descriptors are used in the query language both to express the importance that a term must have in the desired documents and to label the retrieved documents in relevance classes. By attaching a numeri... View full abstract»

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  • Reliability of structures with active control

    Publication Year: 1992, Page(s):1227 - 1234
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The problem of structural reliability with active control is formulated using system identification approaches, fuzzy logic, and expert opinion. Following a statement of the problem, several structural reliability functions are reviewed and summarized. The applications of fuzzy logic are also described View full abstract»

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  • Interval logic and its extension

    Publication Year: 1992, Page(s):579 - 586
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    In general, interval logic has an interval truth value [n, p], where n and p are numerical truth values of [0, 1] and a condition n⩽p has to be satisfied. The author extends interval logic such that the condition n⩽p is removed from the interval truth value, that is, the interval logic has a truth value [a, View full abstract»

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  • f-COCOMO: fuzzy constructive cost model in software engineering

    Publication Year: 1992, Page(s):331 - 337
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The COCOMO (constructive cost model) was established to improve the economic aspects of software development and management with respect to economic benefit. The fuzzy constructive cost model f-COCOMO is developed to give a more reasonable estimation for manpower and development time of a computer software project. The fuzziness involved in the cost estimation of software engineering is discussed,... View full abstract»

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  • Advanced fuzzy logic control technologies in automotive applications

    Publication Year: 1992, Page(s):835 - 842
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Some advanced fuzzy logic control technologies which have been successfully applied in industrial applications in Europe are outlined. Since a significant number of applications were realized in Germany's automotive industry, a research model car built at the RWTH University of Aachen was used as a means of illustration. The objective for the car was to drive as fast as possible without hitting an... View full abstract»

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  • Fuzzy neuro-computational technique and its application to modelling and control

    Publication Year: 1992, Page(s):1271 - 1274
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The authors present a model building technique which combines the strength of fuzzy set theory and neural network based structures. This technique can simultaneously deal with two types of knowledge, nonfuzzy knowledge and fuzzy, which usually describe the behavior of complex processes. The proposed method can also be directly applied to the construction of a new type of intelligent fuzzy controll... View full abstract»

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  • Neural fuzzy architecture for adaptive control

    Publication Year: 1992, Page(s):1115 - 1122
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The authors address the tracking control of linear and nonlinear systems with unknown dynamics. A self-tuning neural fuzzy adaptive control architecture, based on M. Sugeno's model for fuzzy systems (1985) and on the use of feedforward neural networks is proposed. The control loop is described. Then, the adaptive neural version of the Sugeno model for fuzzy inference systems, inserted in this loop... View full abstract»

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  • For closeable and cutworthy properties, closures always commute with cuts

    Publication Year: 1992, Page(s):703 - 705
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    The analysis presented contains generalization and algebraic characterization of closeability and cutworthiness of properties of crisp and fuzzy objects. A positive solution of the Bandler-Kohout problem is obtained. For closeable and cutworthy properties of fuzzy subsets of a finite set, closures always commute with α-cuts View full abstract»

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  • Fuzzy rationality as a basis for group decision making

    Publication Year: 1992, Page(s):1237 - 1243
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The author deals with the group decision-making problem, assuming that each individual defines an opinion through fuzzy binary preference relations, in parallel to the classical approach described by K.J. Arrow (1951, 1964). In particular, it is postulated that the main reason for the discouraging impossibility theorems is neither in the domain of admissible preferences nor in the concept of solut... View full abstract»

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  • Computer aided tuning and validation of fuzzy systems

    Publication Year: 1992, Page(s):605 - 614
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    A set of tools to support the design of fuzzy controllers is illustrated. The tools, based upon dedicated optimization algorithms, allow the tuning and the validation of the fuzzy models. A modified Monte Carlo method has been developed to define stochastic algorithms to complement the deterministic approach, because of the peculiar structure of the systems addressed. The authors show that the des... View full abstract»

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  • Compacting rules for fuzzy production system computation

    Publication Year: 1992, Page(s):933 - 940
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The authors analyze the inference process in fuzzy production systems which have linked rules. The process for obtaining inferences in fuzzy production systems described by a base of linked fuzzy conditional statements is characterized by a very high number of operations to be performed. During the development of the process, an important simplification may be achieved by means of a partial compac... View full abstract»

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  • A fuzzy concept network model and its applications

    Publication Year: 1992, Page(s):761 - 768
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Computer systems often lack the ability to associate similar concepts. Compensating for the semantic ignorance of the system requires the modeling of the concept space of the application domain. A representation of the concept space as a network of fuzzy relationships is given. In the concept knowledge model, four types of relationships are distinguished and formally described. The transitivity of... View full abstract»

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  • A neural expert system using fuzzy teaching input

    Publication Year: 1992, Page(s):485 - 491
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The author previously (1990, 1991) proposed a fuzzy neural expert system and provided a method to extract automatically fuzzy IF-THEN rules from a trained neural network. The previous work is extended and a neural expert system is proposed using fuzzy teaching input. The neural expert system can perform generalization of the information derived from training data with fuzzy teaching input and embo... View full abstract»

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