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IEEE Transactions on Systems, Man, and Cybernetics

Issue 4 • Date Jul/Aug 1990

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Displaying Results 1 - 20 of 20
  • Task-level tour plan generation for mobile robots

    Publication Year: 1990, Page(s):938 - 943
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A tour plan generator (TPG) specifically adapted for mobile robots is described. The TPG computes the itinerary of a tour passing through a number of locations. One typical constraint is that a single-armed mobile robot is usually unable to carry more than one object at a time in its gripper. This constraint requires the TPG to generate a tour in which each pick-up location is visited immediately ... View full abstract»

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  • A comparative study of nonlinear shape models for digital image processing and pattern recognition

    Publication Year: 1990, Page(s):858 - 871
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Four nonlinear shape models are presented: polynomial, Coons, perspective, and projective modes. Algorithms and some properties of these models are provided. For a given physical model, such as a perspective model, comparisons are made with other mathematical models. It is proved that, under certain conditions, the perspective models can be replaced by the Coons models. Problems related to substit... View full abstract»

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  • Design of knowledge-rich hierarchical controllers for large functional systems

    Publication Year: 1990, Page(s):791 - 803
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1220 KB)

    A hierarchical structure that utilizes all the functionalities of a large-scale system and unifies the dynamics of the system with its functional behavior is introduced. The proposed hierarchy is formed by decomposing the physical structure of a system and by associating knowledge-rich controllers with the structure. The inclusion of structural information in the hierarchy has several advantages. ... View full abstract»

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  • Discretized pursuit learning automata

    Publication Year: 1990, Page(s):931 - 938
    Cited by:  Papers (73)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    The problem of a stochastic learning automaton interacting with an unknown random environment is considered. The fundamental problem is that of learning, through interaction, the best action allowed by the environment (i.e. the action that is rewarded optimally). By using running estimates of reward probabilities to learn the optimal action, an extremely efficient pursuit algorithm (PA), which is ... View full abstract»

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  • Coordinating multilimbed robots for generating large Cartesian force

    Publication Year: 1990, Page(s):849 - 857
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    Two coordination methods to enable a multilimbed robot to generate large Cartesian forces are presented. The first method selects an optimal configuration for the arm in terms of the force generation, regardless of the position where the force needs to be applied. The position and orientation of the main body are then adjusted to make the end-effector reach the required position. The second method... View full abstract»

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  • Integrated decision support system for environmental planning

    Publication Year: 1990, Page(s):777 - 790
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1004 KB)

    An integrated decision support system for use in environmental planning has been developed. It consists of eight subsystems: three subsystems are used for the management of relevant data and models; two subsystems are used for the identification of environmental problems; and three subsystems are used for modeling and simulation. The purpose of developing this system is to assist in the identifica... View full abstract»

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  • A unified approach for robot motion planning with moving polyhedral obstacles

    Publication Year: 1990, Page(s):903 - 915
    Cited by:  Papers (43)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    A unified approach suitable for path planning with moving polyhedral obstacles is presented. The planner views the space-time configuration of free space as disjoint polytopes that represent a time-dependent environment consisting of moving and stationary objects. Each point in the space-time domain is mapped into a unique polytope set. The planner then constructs a family of feasible collision-fr... View full abstract»

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  • Analyzing manipulator and feel system effects in aircraft flight control

    Publication Year: 1990, Page(s):923 - 931
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The response characteristics of modern, highly augmented aircraft have reached the point where the vehicle and control system dynamics have begun to interact adversely with the actuation dynamics of the human pilot. Actuation dynamics include the characteristics of both the pilot's neuromuscular system and those of the manipulator and feel system by which the pilot's will is imparted to the aircra... View full abstract»

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  • A generalized knowledge-based system for the recognition of unconstrained handwritten numerals

    Publication Year: 1990, Page(s):835 - 848
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    A method of recognizing unconstrained handwritten numerals using a knowledge base is proposed. Features are collected from a training set and stored in a knowledge base that is used in the recognition stage. Recognition is accomplished by either an inference process or a structural method. The scheme is general, flexible, and applicable to different methods of feature extraction and recognition. B... View full abstract»

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  • MGA: a decision support system for complex, incompletely defined problems

    Publication Year: 1990, Page(s):745 - 757
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    Modeling-to-generate alternatives (MGA) is a technique for using mathematical programming models to generate a small number of different solutions for the decision maker to consider when dealing with complex, incompletely defined problems. The logic of MGA is presented in the context of concerns about the limitations of mathematical models and the human decision-makers who use them. Arguments and ... View full abstract»

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  • Eye-gaze word processing

    Publication Year: 1990, Page(s):944 - 950
    Cited by:  Papers (23)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    Erica is a personal computer operated by eye-gaze. By looking at menu options displayed at different locations on the computer monitor, a disabled user can invoke commands without the need for standard input devices. The design of test entry software for Erica's gaze word processor is described. A basic encoding is accomplished through a static tree-structured menu system, which associates the 85 ... View full abstract»

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  • Application of heuristic search and information theory to sequential fault diagnosis

    Publication Year: 1990, Page(s):872 - 887
    Cited by:  Papers (114)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    The problem of constructing optimal and near-optimal test sequences to diagnose permanent faults in electronic and electromechanical systems is considered. The test sequencing problem is formulated as an optimal binary AND/OR decision tree construction problem, whose solution is known to be NP-complete. The approach used is based on integrated concepts from information theory and heuristic AND/OR ... View full abstract»

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  • Nonlinear operators for improving texture segmentation based on features extracted by spatial filtering

    Publication Year: 1990, Page(s):804 - 815
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    An unsupervised texture segmentation system using texture features obtained from a combination of spatial filters and nonlinear operators is described. Local texture features are evaluated in parallel by a succession of four basic operations: (1) a convolution for local structure detection (local linear transform); (2) a first nonlinearity of the form f(x)=|x|... View full abstract»

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  • Neighboring direction runlength coding: an efficient contour coding scheme

    Publication Year: 1990, Page(s):916 - 921
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    An improved exact coding scheme for a two-tone digital contour is proposed. It is assumed that the contour is one pel thick and perfectly 8-connected. The basic idea of the scheme is to segment the contour at the position where 90 degree bends occur. Each segment is considered as a unit for coding. For coding convenience, the subsegments belonging to the segment, and runs in each subsegment, are i... View full abstract»

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  • Information modeling for computerized manufacturing

    Publication Year: 1990, Page(s):758 - 776
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1740 KB)

    An information modeling and design approach using a metadatabase framework and a two-stage entity-relationship (TSER) methodology to address the system integration problem is presented. The metadatabase framework is a simplification design entailing a federated system architecture, an integrated information model, and a knowledge-based control methodology. The TSER methodology, used for the inform... View full abstract»

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  • Reliability analysis in intelligent machines

    Publication Year: 1990, Page(s):950 - 956
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Given an explicit task to be executed, an intelligent machine must be able to find the probability of success, or reliability, of alternative control and sensing strategies. By using concepts for information theory and reliability theory, new techniques for finding the reliability corresponding to alternative subsets of control and sensing strategies are proposed such that a desired set of specifi... View full abstract»

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  • The optimally stable ranges of 2n-legged wave gaits

    Publication Year: 1990, Page(s):888 - 902
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1148 KB)

    The study of the optimally stable range of the wave gait is extended to the 2n-legged case (n⩾2). To accomplish this, an analytical method is applied to compare the longitudinal stability margin of the wave gait with all periodic and regular gaits. It is shown that the wave gait is optimally stable in the range of 3/4⩽β<1 for n=2, which confirms the analy... View full abstract»

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  • Position independent pattern matching by neural network

    Publication Year: 1990, Page(s):816 - 825
    Cited by:  Papers (4)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    A novel pattern-matching neural network is proposed. The network matches an input to multiple candidates of the stored templates in parallel. It can find the best matching template, whose features are arranged in the same order as those of the input, regardless of positional differences between corresponding features. The network consists of a pattern-matching layer, a minimal distance detection l... View full abstract»

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  • A probabilistic model of neural networks with static attractors

    Publication Year: 1990, Page(s):921 - 922
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    A probabilistic version of the binary Hopfield networks is proposed. Operation of the network is completely parallel, in the sense that evolution of each unit is governed only by its inherent probabilistic law. It is shown that the global state is attracted by one of the equilibria with probability one View full abstract»

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  • Stochastic effectiveness models for human-machine systems

    Publication Year: 1990, Page(s):826 - 834
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Stochastic models for system effectiveness are developed for a multiple-component human-machine system. System effectiveness is defined as the combined measure of availability and reliability at each task-arrival time, when transient human operator behavior is considered in conjunction with the machine state. Because factors such as fatigue, stress, and learning affect the human operator over time... View full abstract»

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