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sensor fusion and decentralized control in robotic systems iv Conference

作者： Schonlau, WJ MMS Rancho Palos Verdes CA 90275 USA

ISBN: (纸本)0819442992

An experimental modeling language for general purpose simulation, robotic control and factory automation is presented. The advantages of a visual programming interface and data flow architecture are examined. Primarily, the model based organization is proposed as a means of integrating various intelligent systems disciplines to enhance problem solving abilities and improve system utility.

关键词： model data-flow visual programming language intelligent robot simulation control automation

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Construction of sensor network system for human behavior measurement and accumulation via distributed objects

Construction of sensor network system for human behavior mea...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Mori, T Noguchi, H Sato, T Univ Tokyo Grad Sch Informat Sci & Technol Dept Mechanoinformat Bunkyo Ku Tokyo 1138656 Japan

ISBN: (纸本)0819442992

This paper describes construction of sensor network system for human behavior measurement and accumulation in a room. The network system consists of three layers: a sensing layer, a process layer and integration layer. It is capable of distributed processing in each module which is a group of several sensors. The implemented system of "robotic Room 2" based on distributed objects allows not only easy integration and accumulation of sensor information but also parallel execution of both integrated measurement and accumulation system.

关键词： human behavior measurement sensor network distributed objects

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Estimating the surface temperature profile from a sequence of partial thermal images

Estimating the surface temperature profile from a sequence o...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Jones, PDA Duncan, SR Univ Oxford Dept Engn Sci Oxford OX1 3PJ England

ISBN: (纸本)0819442992

This paper considers the processing of thermal images taken during an arc spraying process. It describes a filtering method for reconstructing an estimate of the required surface temperature from a sequence of images that contain unpredictable amounts of blurring and obscuration. A practical use of the filtering to control average surface temperature during metal arc spraying is also described.

关键词： partial images thermal imaging electric arc spraying temperature control

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People tracking using omnidirectional vision and range information

People tracking using omnidirectional vision and range infor...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Illmann, J Kluge, B Prassler, E Res Inst Appl Knowledge Proc D-89081 Ulm Germany

ISBN: (纸本)0819442992

In this paper we present two approaches for tracking of people in dynamic environments with a moving sensor system. The trajectories of persons are used to extract simple motion patterns. Object detection and tracking is based on range and color information which is provided by a laser range finder and a onmidirectional color camera. Without any predefined person-model the system acquires an internal representation of the person at an initialization phase. This representation is tracked in real-time in dynamic environments. During the tracking procedure illumination conditions axe continously monitored. The tracking approaches were implemented on a robotic wheelchair and evaluated experimentally in different dynamic environments.

关键词： omnidirectional vision color vision and range fusion people tracking

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BEHAVIORAL KNOWLEDGE IN sensor DATA fusion systems

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JOURNAL OF robotic systems 1990年第3期7卷 295-308页

作者： PAU, LF Technical University DK 2800 Lyngby Denmark

This article proposes a behavioral control formalism to explain situations often encountered in complex sensor/data fusion (eventually decentralized) information acquisition, command and control systems, it involves making the input-output relations of each actor involved in the fusion process conditional on selected behavioral classes, with error creation and repair options. For each behavioral class, the input-output relations are modified by concurrent behavioral rules, while the class itself has visible and hidden attributes. A formalism is also given for interactions between actors. This approach allows to describe and analyze such situations as: indirect observations, ambiguous controls, hysterisis, deadlocks, initiation of attention mechanisms. Finally, the engineering use of this approach is illustrated by three concrete designs involving humans operating indoors.

关键词： control systems

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Building a million beacon map

Building a million beacon map

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Julier, SJ Uhlmann, JK IDAK Ind Jefferson City MO 65109 USA

ISBN: (纸本)0819442992

Many future missions for mobile robots demand multi-robot systems which are capable of operating in large environments for long periods of time. A critical capability is that each robot must be able to localise itself. However, GPS cannot be used in many environments (such as within city streets, under water, indoors, beneath foliage or extra-terrestrial robotic missions) where mobile robots are likely to become commonplace. A widely researched alternative is Simultaneous Localization and Map Building (SLAM): the vehicle constructs a map and, concurrently, estimates its own position. In this paper we consider the problem of building and maintaining an extremely large map (of one million beacons). We describe a fully distributed, highly scaleable SLAM algorithm which is based on distributed data fusion systems. A central map is maintained in global coordinates using the Split Covariance Intersection (SCI) algorithm. Relative and local maps are run independently of the central map and their estimates are periodically fused with the central map.

关键词： Filtering (signal processing) Mobile robots Data fusion Algorithm development Process modeling robotic systems sensors Distributed computing Global Positioning System robotics

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Steering and control of a passively articulated robot

Steering and control of a passively articulated robot

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Shamah, B Wagner, MD Moorehead, S Teza, J Wettergreen, D Whittaker, WR Carnegie Mellon Univ Inst Robot Field Robot Ctr Pittsburgh PA 15213 USA

ISBN: (纸本)0819442992

The need for light weight yet highly mobile robotic platforms is driven by the limitation of available power. With unlimited energy, surface exploration missions could survive for months or years and greatly exceed their current productivity. The Sun-Synchronous Navigation project is developing long-duration solar-powered robot exploration through research in planning techniques and low-mass robot configurations. Hyperion is a rover designed and built for experiments in sun-synchronous exploration. This paper details Hyperion's steering mechanism and control, which features 4-wheel independent drive and an innovative passively articulated steering joint for locomotion.

关键词： Motion controllers robotics control systems Reliability Kinematics Computer programming Actuators Amplifiers sensors Sun

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Algebraic reconstruction technique fusing with pointwise measurements in optical computerized tomography

Algebraic reconstruction technique fusing with pointwise mea...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Yao, W Adjouadi, M Florida Int Univ Dept Elect & Comp Engn Miami FL 33174 USA

ISBN: (纸本)0819442992

In Optical Computerized Tomography (OCT) reconstruction, the well-known restrictions are positivity of the field and boundary conditions. In this paper, the extra information - the probed value of a set of isolated points, which is readily available in industrial practice, is introduced into OCT based on information fusing (IF) techniques. To solve the incompatibility of the different testing systems, which brings high frequencies disturbance to the reconstruction, an adaptive algorithm is developed to make a good use of the pointwise priori. The algorithm derived from the third Algebraic Reconstruction Technique (ART3), is not only friendly to the information from various measuring systems, but very robust to irregular noise and even missing projections as well. By analyzing the simulated experiments, we strongly suggest that OCT give some attention to the information from external resources.

关键词： Optical Computerized Tomography Algebraic Reconstruction Techniques information fusion

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A Bayesian network approach to sensor fusion of aerial imagery

A Bayesian network approach to sensor fusion of aerial image...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Kämpke, T Elfes, A Res Inst Appl Knowledge Proc Ulm Germany

ISBN: (纸本)0819442992

Estimation of superresolution models is a problem of great interest across a broad range of applications in computer vision and robot perception. However, approaches to superresolution model estimation tend to have very high computational complexity. In this paper, we address the superresolution model estimation problem using a general modelling approach based on two-layer Bayesian or causal networks. sensor nodes encode stochastic sensor models, while model nodes encode probabilistic inferences made about their state. The model nodes are arranged as a MRF spatial lattice. We derive optimal estimation procedures for several classes of superresolution world models, including single and multiple observation models, and analyze their computational complexity. We subsequently introduce three suboptimal estimation methods: Reinjection of Marginals (ROM), Independent Opinion Pool (IOP), and Non-Propagation of Neighbours (NPN). These methods, although suboptimal, are extremely efficient and provide high-quality superresolution estimates. We conclude by presenting results from the application of these procedures to the fusion of multiple aerial images to form highly accurate superresolution images for airborne surveying and monitoring applications.

关键词： stochastic sensor fusion Bayesian networks superresolution image estimation Markov random fields stochastic spatial models airborne monitoring

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Integrated virtual space control system utilizing hand gesture for intelligent house

Integrated virtual space control system utilizing hand gestu...

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sensor fusion and decentralized control in robotic systems iv Conference

作者： Mori, T Shimosaka, M Sato, T Univ Tokyo Bunkyo Ku Tokyo 1138656 Japan

ISBN: (纸本)0819442992

This paper proposes an integrated virtual space control system for intelligent house room which consists of many kinds of appliances and information systems to enrich human life. The main features of the system are 1) the user controls the system via a large size display which represents system state linked to "real" appliances, 2) the system utilizes hand gesture to realize intuitive interaction, 3) the virtual space of the display utilizes 3D drag-and-drop metaphor. As for the core component of the proposed system, the paper reports implementation of a hand motion tracking system with multiple views and a controllable camera. Experimental results show that the tracking system solves a problem of the system scale explosion to achieve the accuracy and stability in real-time tracking.

关键词： home-use computer human interaction virtual space display virtual object handling computer vision gesture recognition human hand tracking color extraction Kalman filter

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