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检索条件"任意字段=Sensor Fusion and Decentralized Control in Robotic Systems IV Conference"

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Virtual reality for intelligent and interactive operating-, training- and visualization systems

Virtual reality for intelligent and interactive operating-, ...

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conference on sensor fusion and decentralized control in robotic systems III

作者： Freund, E Rossmann, J Schluse, M Univ Dortmund Inst Robot Res D-44227 Dortmund Germany

ISBN: (纸本)0819438618

Virtual Reality Methods allow a new and intuitive way of communication between man and machine. The basic idea of Virtual Reality (VR) is the generation of artificial computer simulated worlds, which the user not only can look at but also can interact with actively using data glove and data helmet. The main emphasis for the use of such techniques at the IRF is the development of a new generation of operator interfaces for the control of robots and other automation components and for intelligent training systems for complex tasks. The basic idea of the methods developed at the IRF for the realization of "Projective Virtual Reality" is to let the user work in the virtual world as he would act in reality. The user actions are recognized by the Virtual Reality System and by means of new and intelligent control software "projected" onto the automation components like robots which afterwards perform the necessary actions in reality to execute the users task. In this operation mode the user no longer has to be a robot expert to generate tasks for robots or to program them, because intelligent control software recognizes the users intention and generated automatically the commands for nearly every automation component. Now, Virtual Reality Methods are ideally suited for universal man-machine-interfaces for the control and supervision of a big class of automation components, interactive training and visualization systems. The Virtual Reality System of the IRF - COSIMIR/VR - forms the basis for different projects starting with the control of space automation systems in the projects CIROS, VITAL and GETEX, the realization of a comprehensive development tool for the International Space Station and last bus not least with the realistic simulation fire extinguishing, forest machines and excavators which will be presented in the final paper in addition to the key ideas of this Virtual Reality System.

关键词： projective virtual reality man-machine-interface training visualization

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Virtual reality hardware for use in interactive 3D data fusion and visualization

Virtual reality hardware for use in interactive 3D data fusi...

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conference on sensor fusion and decentralized control in Autonomous robotic systems

作者： Gourley, CS Abidi, MA Univ. of Tennessee/Knoxville (United States)

ISBN: (纸本)0819426415

Virtual Reality has become a tool for use in many areas of research. We have designed and built a VR system for use in range data fusion and visualization. One major VR tool is the CAVE. This is the ultimate visualization tool, but comes with a large price tag. Our design uses a unique CAVE whose graphics are powered by a desktop computer instead of a larger rack machine making it much less costly. The system consists of a screen eight feet tall by twenty-seven feet wide giving a variable field-of-view currently set at 160 degrees. A Silicon Graphics Indigo2 MaxImpact with the Impact Channel Option is used for display. This gives the capability to drive three projectors at a resolution of 640x480 for use in displaying the virtual environment and one 640x480 display for a user control interface. This machine is also the first desktop package which has built-in hardware texture mapping. This feature allows us to quickly fuse the range and intensity data and other multi-sensory data. The final goal is a complete 3D texture mapped model of the environment. A dataglove, magnetic tracker, and spaceball are to be used for manipulation of the data and navigation through the virtual environment. This system gives several users the ability to interactively create 3D models from multiple range images.

关键词： virtual reality laser range scanner CAVE visualization

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Real time distributed map building in large environments

Real time distributed map building in large environments

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conference on sensor fusion and decentralized control in robotic systems III

作者： Julier, SJ Uhlmann, JK Naval Research Lab. (United States) Univ. of Missouri/Columbia (United States)

ISBN: (纸本)0819438618

Many of the future missions for mobile robots demand multi-robot systems which are capable of operating in large environments for long periods of time. One of the most critical capabilities is the ability to localize - a mobile robot must be able to estimate its own position and to consistently transmit this information to other robots and control sites. Although state-of-the-art GPS is capable of yielding unmatched performance over large areas, it is not applicable 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. However, most approaches are non-scalable (the storage and computational costs vary quadratically and cubically with the number of beacons in the map) and can only be used with multiple robotic vehicles with a great degree of difficulty. In this paper, we describe the development of a scalable, multiple-vehicle SLAM system. This system, based on the Covariance Intersection algorithm, is scalable - its storage and computational costs are linearly proportional to the number of beacons in the map. Furthermore, it is scalable to multiple robots - each has complete freedom to exchange partial or full map information with any other robot at any other time step. We demonstrate the real-time performance of this system in a scenario of 15,000 beacons.

关键词： Robots Mobile robots sensors Algorithm development Process modeling Data fusion Filtering (signal processing) robotics Computing systems robotic systems

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Resource-based action planning for multi-agent systems

Resource-based action planning for multi-agent systems

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conference on sensor fusion amd decentralized control in robotic systems

作者： Freund, E Hoffmann, K Rossmann, J Univ Dortmund Inst Robot Res D-44227 Dortmund Germany

ISBN: (纸本)0819429848

With the use of multi-robot-systems new chances and perspectives are revealed for industrial, space- and underwater-applications. At the IRF, a versatile multi-robot-control, which fully exploits the inherent flexibility of a multi-robot-system, has been developed. In order to guarantee optimized system-throughput and increased autonomy, the system builds on a new resource-based action planning approach to coordinate the different robot manipulators and other automation components in the workcell. An important issue of the realized action planning component to be applicable to real world problems is that it is realized as an integral part of the hierarchical multi-robot control structure IRCS (Intelligent Robot control System). The IRCS is the multi-robot control that was chosen by the German Space Agency (DLR) for major space automation projects. In this structure the resource-based action planning component is tightly integrated with components for coordinated task execution and collision avoidance to guarantee save operation of all agents in the multi-robot system. As the action planning component "understands" task descriptions on a high level of abstraction it is also the perfect counterpart for a Projective Virtual Reality (VR) system. The paper will describe the mechanism of resource based action planning, the practical experiences gained from the implementation for the IRCS as well as its services to support VR-based man machine interfaces.

关键词： resource-based action planning action pattern net multistage action planning online model expansion intelligent multi-robot-control exploitation of flexibility virtual reality user friendliness increased autonomy and safety

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Model-based control of glass melting furnaces and forehearths: First principles-based model of predictive control system design

Model-based control of glass melting furnaces and forehearth...

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sensor fusion and decentralized control in robotic systems iv

作者： Backx, Ton C. Huisman, Leo Astrid, Patricia Beerkens, Ruud IPCOS Technology Boxtel Netherlands Eindhoven University of Technology Eindhoven Netherlands

An overview is given of new developments in the area of process modeling for model-based control system design. Focus is on the state of the art in model predictive control. Results obtained by applying these techniqu... 详细信息

关键词： Melting furnaces

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Evolution of neural controllers for salamander-like locomotion

Evolution of neural controllers for salamander-like locomoti...

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sensor fusion and decentralized control in robotic systems II conference

作者： Ijspeert, AJ Univ So Calif Dept Comp Sci Los Angeles CA 90879 USA

ISBN: (纸本)0819434329

This paper presents an experiment in which evolutionary algorithms are used for the development of neural controllers for salamander locomotion. The aim of the experiment is to investigate which kind of neural circuitry can produce the typical swimming and trotting gaits of the salamander, and to develop a synthetic approach to neurobiology by using genetic algorithms as design tool. A 2D bio-mechanical simulation of the salamander's body is developed whose muscle contraction is determined by the locomotion controller simulated as continuous-time neural networks. While the connectivity of the neural circuitry underlying locomotion in the salamander has not been decoded for the moment, the general organization of the designed neural circuits corresponds to that hypothesized by neurobiologists for the real animal. in particular, the locomotion controllers are based on a body central pattern generator (CPG) corresponding to a lamprey-like swimming controller as developed by Ekeberg,(1) and are extended with a limb CPG for controlling the salamander's body. A genetic algorithm is used to instantiate synaptic weights of the connections within the limb CPG and from the limb CPG to the body CPG given a high level description of the desired gaits. A set of biologically plausible controllers are thus developed which can produce a neural activity and locomotion gaits very similar to those observed in the real salamander. By simply varying the external excitation applied to the network, the speed, direction and type of gait can be varied.

关键词： Oscillators Gait analysis Device simulation Genetic algorithms Neurons Algorithm development Neuroscience Evolutionary algorithms Neural networks systems modeling

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Integrating sensorimotor systems in a robot model of cricket behavior

Integrating sensorimotor systems in a robot model of cricket...

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conference on sensor fusion and decentralized control in robotic systems III

作者： Webb, B Harrison, RR Univ Stirling Dept Psychol Ctr Cognit & Computat Neurosci Stirling FK9 4LA Scotland

ISBN: (纸本)0819438618

The mechanisms by which animals manage sensorimotor integration and coordination of different behaviors can be investigated in robot models. In previous work the first author has built a robot that localizes sound based on close modeling of the auditory and neural system in the cricket. It is known that the cricket combines its response to sound with other sensorimotor activities such as an optomotor reflex and reactions to mechanical stimulation of the antennae and cerci. Behavioral evidence suggests some ways these behaviors may be integrated. We have tested the addition of an optomotor response, using an analog VLSI circuit developed by the second author, to the sound localizing behavior and have shown that it can, as in the cricket, improve the directness of the robot's path to sound. In particular it substantially improves behavior when the robot is subject to a motor disturbance. Our aim is to better understand how the insect brain functions in controlling complex combinations of behavior, with the hope that this will also suggest novel mechanisms for sensory integration on robots.

关键词： sound localization insect vision biorobotics sensorimotor integration

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Auto-agent: A behavior-based architecture for mobile navigation

Auto-agent: A behavior-based architecture for mobile navigat...

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conference on sensor fusion amd decentralized control in robotic systems

作者： Hwang, KS Lu, MY Natl Chung Cheng Univ Dept Elect Engn Chai Yi Taiwan

ISBN: (纸本)0819429848

The design and construction of mobile robots is as much an art as a science. Ire hardware architecture, researchers tend to construct a low-cost and reliable platform which equips with various sensory system for sensing the change of the environment to offer useful information to the navigation system. An autonomous navigation system plays a role in an mobile robot as the brain in human being, It generates action command according to those sensory data from the perception system to direct the mobile robot to go to desired positions or accomplish useful tasks without human intervention in real-world, An important problem hi autonomous navigation is the need to cope with the large amount of uncertainty that is inherent of natural environment. Therefore the development of techniques for autonomous navigation in real-world environments constitutes one uf the major trends in the current research on robotics. Inspired with the concept of software agents, reactive control and behavior-based control a modular architecture called Ante-agent, for mobile navigation is proposed, The main characteristic of Auto-agent is as following: Behavioral agents cooperate by means of communicating with other behavioral agents intermittently to achieve their local goal and the goals of the community as a whole because nea one individually has sufficient competence, resources and information to solve the entire probit nl. Auto-agent gains advantages from the characteristics of distributed system, it offers the possibility to find an acceptable solution with a reasonable time and complexity range, Besides, the modular structure iu convenient nt for an engineer to construct a new behavioral agent and to add it into Auto-agent.

关键词： behavior-based navigation system reactive control mobile robot

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A modified reactive control framework for cooperative mobile robots

A modified reactive control framework for cooperative mobile...

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conference on sensor fusion and decentralized control in Autonomous robotic systems

作者： Salido, J Dolan, JM Hampshire, J Khosla, P Robotics Institute Carnegie Mellon Univ. Pittsburgh PA 15213-3891 United States Dept. of Electrical and Computer Engineering Carnegie Mellon Univ. Pittsburgh PA 15213-3890 United States Castilla-La Mancha Univ.

ISBN: (纸本)0819426415

An important class of robotic applications potentially involves multiple, cooperating robots: security or military surveillance, rescue, mining, etc. One of the main challenges in this area is effective cooperative control: how does one determine and orchestrate individual robot behaviors which result in a desired group behavior? Cognitive (planning) approaches allow for explicit coordination between robots, but suffer from high computational demands and a need for a priori, detailed world models. Purely reactive approaches such as that of Brooks are efficient, but lack a mechanism for global control and learning. Neither approach by itself provides a formalism capable of a sufficiently rapid and rich range of cooperative behaviors. Although we accept the usefulness of the reactive paradigm in building up complex behaviors from simple ones, we seek to extend and modify it in several ways. First, rather than restricting primitive behaviors to fixed input-output relationships, we include memory and learning through feedback adaptation of behaviors. Second, rather than a fixed priority of behaviors, our priorities are implicity they vary depending on environmental stimuli. Finally, we scale this modified reactive architecture to apply not only for an individual robot, but also at the level of multiple cooperating robots: at this level, individual robots are like individual behaviors which combine to achieve a desired aggregate behavior. In this paper, we describe our proposed architecture and its current implementation. The application of particular interest to us is the control of a team of mobile robots cooperating to perform area surveillance and target acquisition and tracking.

关键词： cooperative mobile robots social behavior reinforcement learning intelligence

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A vision-guided, semi-autonomous system applied to a robotic coating application

A vision-guided, semi-autonomous system applied to a robotic...

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conference on sensor fusion and decentralized control in Autonomous robotic systems

作者： Seelinger, MJ Robinson, M Dieck, Z Skaar, SB University of Notre Dame Department of Aerospace and Mechanical Engineering Fitzpatrick Hall of Engineering Notre Dame IN 46556 United States

ISBN: (纸本)0819426415

This paper describes a new semi-autonomous, calibration-free system which integrates a user-friendly graphical interface, several cameras, a laser pointer mounted on a two-axis pan/tilt unit, and a six degree-of-freedom robot. The details of the system will be discussed in reference to the problem of coating a workpiece of unknown geometry that is positioned arbitrarily with respect to the robot and the vision sensors. The remote user specifies the region of the workpiece that is to be coated simply by ''pointing'' and ''clicking'' on the region of interest as it appears in a single image on the user's computer monitor. By means of a simple and robust control strategy, the laser pointer mounted on the pan/tilt unit is autonomously actuated to a user-specified number of approximate positions in the region of the surface of interest. This is used to create compatible maneuver objectives in the participating vision sensors. Then, using the method of camera-space manipulation, the robot is controlled to make several passes across the region. Regardless of the geometry of the workpiece, the manipulated nozzle always remains perpendicular to the surface at a user-specified distance from the surface, Upon completion of the coating process, the laser pointer is again actuated to pass through a specified number of points on the :new surface. This information is used to make a very precise inference of the thickness of the build-up of the coat that has been applied. If the coat is not sufficiently thick, the robot makes more passes as required. The paper also presents experimental results of the high accuracy of position and orientation control of the manipulated tool, as well as the depth inference of the surface coat applied.

关键词： camera-space manipulation robot vision supervisory control inspection graphical user interface

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