IEEE Transactions on Systems, Man, and Cybernetics

Issue 2 • March-April 1993

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Displaying Results 1 - 25 of 32
  • A marionette-based strategy for stable movement

    Publication Year: 1993, Page(s):502 - 511
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    A strategy is developed for stable movement of a marionette under a system of unidirectional muscle-like actuators. It is shown that the strategy provides positive forces and positive inputs to the actuators that can be made analogous to monotonic function of the firing rate of natural muscles. The strategy requires more pairs of actuators than the degrees of freedom of the system-hence a need for... View full abstract»

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  • A bit-serial VLSI architecture for generating moments in real-time

    Publication Year: 1993, Page(s):539 - 546
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    In computer vision and image processing, the high degree of parallelism and pipelining of algorithms is often obstructed by the raster-scan I/O constraint and the information growing property of multiresolution structures. The approach of formulating algorithms in the pyramid structure as a binary tree structure, and mapping the binary tree structure into a linear pipelined array of 2logN... View full abstract»

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  • A fuzzy controller for generator excitation control

    Publication Year: 1993, Page(s):532 - 539
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    An approach based on fuzzy set theory is proposed for the design of an excitation controller for a synchronous generator. In the proposed fuzzy expert system, generator speed deviation and acceleration are taken as controller inputs. These input signals are first characterized by linguistic variables using fuzzy set notations. A fuzzy relation matrix is built to give the relationship between contr... View full abstract»

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  • Petri net synthesis and analysis of a flexible manufacturing system cell

    Publication Year: 1993, Page(s):523 - 531
    Cited by:  Papers (70)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    The modeling and analysis of a flexible manufacturing system (FMS) cell using Petri nets is presented. In order to illustrate how a Petri net with desirable properties can be constructed, the detailed synthesis process for this cell is described. During the process, top-down refinement, system decomposition, and modular composition ideas are used to achieve the hierarchy and preservation of import... View full abstract»

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  • A hypertext software package to help document system designs

    Publication Year: 1993, Page(s):584 - 589
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A hypertext-based software package that was created to help engineers with little formal systems engineering experience to document a system design is examined. A hypertext-based object-oriented programming environment allows easy transfer of information within the design and provides a user friendly interface. Tradeoff analysis is automated. This allows fast sensitivity analysis within the tradeo... View full abstract»

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  • An efficient feature-based connectionist inheritance scheme

    Publication Year: 1993, Page(s):512 - 522
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    A connectionist model that deals with the inheritance problem in an efficient and natural way is described. Based on the connectionist architecture CONSYDERR, the author analyses the problem of property inheritance and formulates it in ways facilitating conceptual clarity and connectionist implementation. A set of benchmarks is specified for ensuring the correctness of solution mechanisms. Paramet... View full abstract»

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  • Optimum path planning for robot manipulators amid static and dynamic obstacles

    Publication Year: 1993, Page(s):576 - 584
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    Optimum path planning algorithms for robot manipulators are presented. It is assumed that a manipulator is working in an environment that contains a static obstacle or another manipulator. A collision avoidance strategy is developed based on a simplified representation of the robot arm. The two different path planning problems addressed are the minimum-time path planning and the minimum-energy pat... View full abstract»

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  • An allocation algorithm for distributing Datalog programs

    Publication Year: 1993, Page(s):570 - 576
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    An O(N3) algorithm for partitioning and allocating N Datalog procedural bundles among K distributed or dedicated processors is presented. The algorithm determines a static distribution of the bundles to all K processors. The independent variables of the objective function include both processing and communication costs, and the goal is to bal... View full abstract»

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  • Application of describing functions in the transient response analysis of a three-term fuzzy controller

    Publication Year: 1993, Page(s):603 - 606
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The exponential-input describing function technique is used to investigate the transient response of a fuzzy controller. The rule-base of this fuzzy controller is generated by fuzzy addition and the partitioning of the universes of discourse of its input and output variables is based on an exponential mapping scheme. By using the symmetric features introduced by fuzzy addition in the decision tabl... View full abstract»

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  • Decision boundary feature extraction for nonparametric classification

    Publication Year: 1993, Page(s):433 - 444
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    A new feature extraction algorithm based on decision boundaries for nonparametric classifiers is proposed. It is noted that feature extraction for pattern recognition is equivalent to retaining discriminantly informative features, and a discriminantly informative feature is related to the decision boundary. Since nonparametric classifiers do not define decision boundaries in analytic form, the dec... View full abstract»

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  • Sensitivity analyses of continuous and discrete systems in the time and frequency domains

    Publication Year: 1993, Page(s):488 - 501
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1296 KB)

    The technique of sensitivity analysis is old and well known, but few modern papers include them, perhaps because of the subtle tricks and customizations that have to be done to reap their benefits. The authors show how to overcome some of the difficulties of performing sensitivity analyses. They draw examples from a broad range of fields: physics, systems theory, physiology, expert systems, bioeng... View full abstract»

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  • A multiobjective optimization approach to quality control with application to plastic injection molding

    Publication Year: 1993, Page(s):414 - 426
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    A multiobjective approach to manufacturing process optimization is described. This approach places no restriction on the type or number of performance criteria and no a priori weights need be chosen for it since performance criteria are not combined into a single objective function. An algorithm is implemented that runs in real-time and provides immediate feedback to a process operator about the c... View full abstract»

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  • Uncertainty handling and cognitive biases in knowledge engineering

    Publication Year: 1993, Page(s):563 - 570
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    The extent to which cognitive biases have an impact on knowledge engineering, particularly in the area of uncertainty handling, is explored. Subjects wrote rules to predict the color of objects drawn from an urn, based on several indicators. They also assigned confidence values to their rules. This task, though admittedly simplistic, was taken as representative of a large class of diagnosis and pr... View full abstract»

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  • Temporal-difference methods and Markov models

    Publication Year: 1993, Page(s):357 - 365
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The relation between temporal-difference training methods and Markov models is explored. This relation is derived from a new perspective, and in this way the particular association between conventional temporal-difference methods and first-order Markov models is explained. The authors then derive a generalization of temporal-difference methods that is suitable for Markov models of higher order. Se... View full abstract»

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  • Element selection from a fuzzy subset using the fuzzy integral

    Publication Year: 1993, Page(s):467 - 477
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    The problem of selecting a crisp element based upon a fuzzy set is investigated. It is noted that the defuzzification problem in fuzzy logic control is a special case of this problem. The given fuzzy subset is considered as a set of pieces of advice where the strengths of the advice is the membership grade. This problem is formulated in terms of a generalized expected value, an aggregation problem... View full abstract»

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  • Perceptual organization in computer vision: a review and a proposal for a classificatory structure

    Publication Year: 1993, Page(s):382 - 399
    Cited by:  Papers (101)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1976 KB)

    The role of perceptual organization in computer vision systems is explored. This is done from four vantage points. A brief history of perceptual organization research in both humans and computer vision is offered. A classificatory structure in which to cast perceptual organization research to clarify both the nomenclature and the relationships among the many contributions is proposed. The perceptu... View full abstract»

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  • Heuristics for local path planning

    Publication Year: 1993, Page(s):624 - 634
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    A heuristic technique for solving the problem of path planning based on local information for a mobile robot with acceleration constraints moving amidst a set of stationary obstacles is described. The concept of safety is used to design a planning strategy. A path based on local information that maximizes the product of safety and attraction towards the goal is chosen. The safety function depends ... View full abstract»

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  • An inductive inference procedure to minimize prediction error

    Publication Year: 1993, Page(s):547 - 554
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    Considering inductive inference and deductive inference as not individual processes but a serial process of information processing, the serial inference procedure is studied for two purposes: the compression of observed facts and the prediction of new well-formed formulas. A serial inference process scheme that uses the correspondence to source coding and prediction problems is proposed. The optim... View full abstract»

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  • Robust adaptive controller design and stability analysis for flexible-joint manipulators

    Publication Year: 1993, Page(s):589 - 602
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The problem of controlling robot manipulators with flexible joints is considered. A reduced-order flexible-joint model based on a singular perturbation formulation of the manipulator equations of motion is used. The concept of an integral manifold is utilized to construct the dynamics of the slow subsystem. A fast subsystem is constructed to represent the dynamics of the elastic forces at the join... View full abstract»

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  • Learning piecewise control strategies in a modular neural network architecture

    Publication Year: 1993, Page(s):337 - 345
    Cited by:  Papers (100)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    The authors describe a multinetwork, or modular, neural network architecture that learns to perform control tasks using a piecewise control strategy. The architecture's networks compete to learn the training patterns. As a result, a plant's parameter space is adaptively partitioned into a number of regions, and a different network learns a control law in each region. This learning process is descr... View full abstract»

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  • Steady-state analysis of a three-term fuzzy controller

    Publication Year: 1993, Page(s):607 - 610
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The steady-state response of a fuzzy logic controller that uses fuzzy addition as the basis for its decision making process is analyzed mathematically. The nature of the look-up table constructed from fuzzy addition enables the decomposition of the fuzzy controller into three one-dimensional-multilevel relays. Unlike the sinusoidal-input describing function technique, the steady-state response of ... View full abstract»

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  • A quantitative treatment of multilevel specificity and uncertainty in variable precision reasoning

    Publication Year: 1993, Page(s):445 - 451
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    A methodology for reasoning about the state of the environment based on evidence received from some source is developed. It is assumed that the evidence is expressed as a probability mass function defined on a discrete set of mutually exclusive hypotheses about the state of the environment. Given that the quality of the evidence is variable, it follows that the precision of the reasoning process m... View full abstract»

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  • A physiological method for relaying frictional information to a human teleoperator

    Publication Year: 1993, Page(s):427 - 432
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The ability to sense and respond to frictional variations is important for dexterous manipulation. It is demonstrated that it is possible to elicit rapid, nonhabituating and sustained grasp responses by means of a tactile display. Experiments in which subjects grasped and lifted an instrumented test object using the thumb and index finger are reported. While the object was held in air, rapid but s... View full abstract»

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  • A decision-theoretic framework for integrating sensors into AI plans

    Publication Year: 1993, Page(s):366 - 373
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    Strategic planners for robots that survive in a realistic environment must coordinate sensor acquisition with robotic activity. Sensory coordination is discussed as a decision problem. It is assumed that although relevant sensory data can generally be requested, costs prohibit many of these requests from being granted. The underlying question is whether a central controller should grant or deny a ... View full abstract»

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  • Intelligent path prediction for vehicular travel

    Publication Year: 1993, Page(s):478 - 487
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    A method for predicting the motion of an observed vehicle by reasoning about the actions taken by the operator of the vehicle is presented. Reasoning about action is pursued by investigating decision-making strategies that might replicate the motion of the vehicle. Tracking a vehicle performing a transit mission, a mission that proceeds from a start location to a goal location guided by an intelli... View full abstract»

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