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Recognizing interaction from a robot's perspective

Recognizing interaction from a robot's perspective

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： T. Salter F. Michaud K. Dautenhahn D. Letourneau S. Caron LABORIUS-Research Laboratory on Mobile Robotics and Intelligent Systems Department of Electrical Engineering and Computer Engineering Université de Sherbrook Sherbrooke QUE Canada Adaptive Systems Research Group School of Computer Science University of Herfordshire Hatfield UK

For meaningful interaction between a robot and a human, an autonomous robot must recognize whether the experienced situation is created by people or by the environment. Using only proprioceptive data from a mobile robotic platform, we discover that it is possible to distinguish sensory data patterns involving interaction. These patterns are obtained whilst navigating varying environments, both human populated and unpopulated. The paper reports the initial set of trials using Roball, a spherical mobile robot. Also described is the experimental methodology currently followed to validate the hypothesis that child interaction can be perceived directly from navigation sensors onboard a robotic platform.

关键词： Robot sensing systems Mobile robots Human robot interaction Navigation Intelligent robots Sensor phenomena and characterization Infrared sensors Educational institutions Plastics Mobile computing

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Optical flow-based tracking of deformable objects using a non-prior training active feature model 5th

Optical flow-based tracking of deformable objects using a no...

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5th Pacific Rim Conference on Multimedia, PCM 2004

作者： Kim, Sangjin Kang, Jinyoung Shin, Jeongho Lee, Seongwon Paik, Joonki Kang, Sangkyu Abidi, Besma Abidi, Mongi Image Processing and Intelligent Systems Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University 221 Huksuk-Dong Tongjak-Ku Seoul156-756 Korea Republic of Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering The University of Tennessee KnoxvilleTN37996-2100 United States

ISBN: (纸本)9783540239857

This paper presents a feature point tracking algorithm using optical flow under the non-prior training active feature model (NPT-AFM) framework. The proposed algorithm mainly focuses on analysis of deformable objects, and provides real-time, robust tracking. The proposed object tracking procedure can be divided into two steps: (i) optical flow-based tracking of feature points and (ii) NPT-AFM for robust tracking. In order to handle occlusion problems in object tracking, feature points inside an object are estimated instead of its shape boundary of the conventional active contour model (ACM) or active shape model (ASM), and are updated as an element of the training set for the AFM. The proposed NPT-AFM framework enables the tracking of occluded objects in complicated background. Experimental results show that the proposed NPT-AFM-based algorithm can track deformable objects in real-time. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Optical flows

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A Modeling Framework for Six Degree-of-Freedom Control of Unmanned Sea Surface Vehicles

A Modeling Framework for Six Degree-of-Freedom Control of Un...

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IEEE Conference on Decision and Control

作者： P. Krishnamurthy F. Khorrami S. Fujikawa Control/Robotics Research Laboratory (CRRL) Department of Electrical and Computer Engineering Polytechnic University Brooklyn NY USA IntelliTech Microsystems Inc. Bowie MD USA

ISBN: (纸本)0780395670

A detailed six degree-of-freedom (DOF) nonlinear dynamic model of an Unmanned Sea Surface Vehicle (USSV) is developed. Models of the significant hydrodynamic effects including radiation-induced and damping forces and moments are incorporated. Disturbance models of forces and moments caused by ocean currents, waves, and wind are also included. Detailed models of the actuators including thrusters/propellers and control surfaces are included. To illustrate the importance of a six DOF modeling and the impact of disturbances, simulation results with two different controllers are presented. The detailed mathematical modeling in this paper is intended to provide the appropriate framework for a control design which explicitly addresses the six DOF USSV dynamics along with the disturbances.

关键词： Sea surface Vehicle dynamics Control design Kinematics Hydrodynamics Damping Oceans Actuators Propellers Mathematical model

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Control design implementation for Sawyer motors used in manufacturing systems

Control design implementation for Sawyer motors used in manu...

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American Control Conference (ACC)

作者： P. Krishnamurthy F. Khorrami T.L. Ng I. Cherepinsky Control/Robotics Research Laboratory(CRRL) Department of Electrical and Computer Engineering Six Metrotech Center Polytechnic University Brooklyn NY USA Sikorsky in Stratford CT USA

In this paper, hardware integration and control design for a dual-axis linear stepper (Sawyer) motor are addressed. In particular, the Sawyer motor used in the Yaskawa/MotoMan manufacturing system which is utilized in various applications such as assembly, packaging, sorting, and probing, is considered. These motors are equipped with four optical sensors with a position resolution of 0.25 microns. We develop a detailed model of the motor for control validation and provide a comparison of two control designs, namely, a PD (or PID) and a robust adaptive nonlinear controller. To achieve high performance, a number of practical issues (such as delay/latency, finite sampling time, sensor noise, commutation rate, etc.) need to be considered. Effects of these factors are outlined and experimentally demonstrated. Both the considered controllers utilize knowledge of motor position and velocity in all axes. Current measurements are not required. Either numerical differentiation or a dynamic observer can be used to construct the velocity signals from the measured position data. The designed nonlinear controller provides practical stabilization of position tracking errors and achieves better overall performance. Adaptations are utilized so that no knowledge of the electromechanical system parameters is required. The proposed nonlinear controller is robust to load torques, friction, cogging forces, and other disturbances satisfying certain bounds. Furthermore, the controller corrects for the unintended yaw and achieves synchrony of the motor and rotor teeth. We have also observed that if the rotational motion is not corrected for, the performance is very poor for both controllers. This is also true in the case of delay/latency and higher rates of commutation.

关键词： Control design Manufacturing systems Delay Robust control Commutation Hardware Assembly systems Packaging Sorting Micromotors

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Transference of Evolved Unmanned Aerial Vehicle Controllers to a Wheeled Mobile Robot

Transference of Evolved Unmanned Aerial Vehicle Controllers ...

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IEEE International Conference on robotics and Automation (ICRA)

作者： G.J. Barlow L.S. Mattos E. Grant C.K. Oh Center for Robotics and Intelligent Machines Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA U.S. Naval Research Laboratory Washington D.C. USA

Transference of controllers evolved in simulation to real vehicles is an important issue in evolutionary robotics (ER). We have previously evolved autonomous navigation controllers for fixed wing UAV applications using multi-objective genetic programming (GP). Controllers were evolved to locate a radar source, navigate the UAV to the source efficiently using on-board sensor measurements, and circle around the emitter. We successfully tested an evolved UAV controller on a wheeled mobile robot. A passive sonar system on the robot was used in place of the radar sensor, and a speaker emitting a tone was used as the target in place of a radar. Using the evolved navigation controller, the mobile robot moved to the speaker and circled around it. The results from this experiment demonstrate that our evolved controllers are capable of transference to real vehicles. Future research will include testing the best evolved controllers by using them to fly real UAVs.

关键词： Unmanned aerial vehicles Mobile robots Sonar navigation Robot control Robot sensing systems Genetic programming Testing Passive radar Remotely operated vehicles Erbium

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Modeling of human driving behavior based on piecewise linear model

Modeling of human driving behavior based on piecewise linear...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Jong-Hae Kim S. Okuma Young-Woo Kim Don-Ha Hwang Min-Huei Kim Dong-Hee Kim Department of Electrical Engineering and Computer Science Graduate School of Engineering University of Nagoya Japan Space Robotics Research Center Toyota Technological Institute Nagoya Japan Industry Applications Research Laboratory Korea Electrotechnology Research Institute Changwon South Korea Department of Electrical & Automation Engineering Yeungnam College of Science and Technology Daegu South Korea Department of Electrical Engineering Yeungnam University Kyungbuk South Korea

This paper presents the development of the modeling strategy of the human driving behavior based on the expression as Piecewise Linear (PWL) model focusing on the driver’s stopping maneuver. The driving data are collected by using the three-dimensional driving simulator based on CAVE, which provides stereoscopic immersive vision. In our modeling, the relationship between the driver’s sensory information and the operation of the driver such as braking amount is expressed by PWL model, which is a class of Hybrid Dynamical System (HDS). The identification problem for the PWL model is formulated as the Mixed Integer Linear Programming (MILP) by transforming the switching conditions into binary variables. From the obtained results, it is found that the driver appropriately switches the ‘control low’ according to the sensory information. These results enable us to capture not only the physical meaning of the driving skill, but also the decision-making aspect (switching conditions) in the driver’s stopping maneuver.

关键词： Humans Piecewise linear techniques Hidden Markov models Decision making computer science Space technology robotics and automation Switches Automatic control Service robots

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Integrated Process for Measurement of Free-Form Automotive Part Surface Using a Digital Area Sensor

Integrated Process for Measurement of Free-Form Automotive P...

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IEEE International Conference on robotics and Automation (ICRA)

作者： Quan Shi Ning Xi Heping Chen Yifan Chen Electrical and Computer Engineering Department Michigan State University East Lansing MI USA Scientific Research Laboratory Ford Motor Company Laboratory Dearborn MI USA

This paper introduces a fully automated dimensional inspection (ADI) system using a digital area sensor. Instead of measuring a part surface point-by-point using a Coordinate Measuring Machine (CMM), an ADI system can measure a part surface patch-by-patch. Therefore, the inspection time can be significantly reduced. Many existing sensor planners were developed for one or two cameras. In the proposed ADI system, the sensor planner is developed for a digital area sensor, which is made by a CCD camera and a digital projector. In application, sensor viewpoints are estimated automatically. On each viewpoint, thousands of points on part surfaces can be measured in only several seconds.

关键词： Area measurement Automotive engineering Sensor systems Inspection Coordinate measuring machines Strategic planning Robot vision systems Charge coupled devices Digital cameras Charge-coupled image sensors

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Scalable temporal interest points for abstraction and classification of video events

Scalable temporal interest points for abstraction and classi...

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IEEE International Conference on Multimedia and Expo (ICME)

作者： Seung-Hoon Han ln-So Kweon Digital Media R&D Center Samsung Electronics Company Limited South Korea Robotics and Computer Vision Laboratory Division of Electrical Engineering Department of EECS Korea Advanced Institute of Science and Technology South Korea

The image sequence of a static scene includes similar or redundant information over time. Hence, motion-discontinuous instants can efficiently characterize a video shot or event. However, such instants (key frames) are differently identified according to the change of velocity and acceleration of motion, and such scales of change might be different on each sequence of the same event. In this paper, we present a scalable video abstraction in which the key frames are obtained by the maximum curvature of camera motion at each temporal scale. The scalability means dealing with the velocity and acceleration change of motion. In the temporal neighborhood determined by the scale, the scene features (motion, color, and edge) can be used to index and classify the video events. Therefore, those key frames provide temporal interest points (TIPs) for the abstraction and classification of video events.

关键词： Layout Acceleration Cameras Humans research and development Robot vision systems computer vision Laboratories Image sequences Scalability

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Task allocation for event-aware spatiotemporal sampling of environmental variables

Task allocation for event-aware spatiotemporal sampling of e...

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2005 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： M.A. Batalin G.S. Sukhatme Yan Yu R. Pon J. Gordon M.H. Rahimi W.J. Kaiser G.J. Pottie D.E. Estrin Center for Robotics and Embedded Systems Robotic Embedded Systems Laboratory Computer Science Department University of Southern California Los Angeles CA USA Department of Computer Science Center for Embedded Networked Sensing University of California Los Angeles CA USA Department of Electrical Engineering Center for Embedded Networked Sensing University of California Los Angeles CA USA

Monitoring of environmental phenomena with embedded networked sensing confronts the challenges of both unpredictable variability in the spatial distribution of phenomena coupled with the demands for a high spatial sampling rate in three dimensions. For example, low distortion mapping of critical solar radiation properties in forest environments may require two-dimensional spatial sampling rates of greater than 10 samples/m/sup 2/ over transects exceeding 1000 m/sup 2/. Clearly, adequate sampling coverage of such transect requires an impractically large number of sensing nodes. A new approach, networked infomechanical system (NIMS), has been introduced to combine autonomous-articulated and static sensor nodes enabling sufficient spatiotemporal sampling density over large transects to meet a general set of environmental mapping demands. This paper describes our work on the critical parts of NIMS, the task allocation module. We present our methodologies and the two basic greedy task allocation policies - based on time of the task arrival (time policy) and distance from the robot to the task (distance policy). We present results from NIMS deployed in a forest reserve and from a lab testbed. The results show that both policies are adequate for the task of spatiotemporal sampling, but also complement each other. Finally, we suggest the future direction of research that would both help us better quantify the performance of our system and create more complex policies.

关键词： Spatiotemporal phenomena Sampling methods Sensor phenomena and characterization Solar radiation Mobile robots Atmospheric measurements Ecosystems Robot sensing systems Embedded system computer science

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Autonomous power-scavenging MEMS robots

Autonomous power-scavenging MEMS robots

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Midwest Symposium on Circuits and Systems (MWSCAS)

作者： D.J. Denninghoff L.A. Starman P.E. Kladitis C.E. Perry Department of Electrical and Computer Engineering Air Force Institute of Technology OH USA Air Force Research Laboratory AFRL Micro Munitions Technology Team Munitions Directorate Eglin Air Force Base FL USA

The initial development of novel 80- and 500-mum MEMS flying robots with potential autonomous movement and power-scavenging abilities are described in this paper. Microrobot applications as well as the developments of walking and flying miniature robots are discussed. Laser-heating theory as a powering scheme and residual-stress deflection are investigated. Several pinwheel-based robots composed of polysilicon and gold have been designed and fabricated in polyMUMPs. Residual-stress actuators are imbedded into each robot wing and powered optothermally with a 660-nm laser. The robots are designed to heat and cool asymmetrically so as to rotate and generate lift. Preliminary results from 500-mum fabricated designs show a vertical wingtip deflection of 7.2-mum. Laser-powered actuation is yet to be tested. Once these robots demonstrate autonomous flight, further research in integrating CMOS processing circuitry and MEMS-based sensors and actuators are investigated

关键词： Micromechanical devices Legged locomotion Robot sensing systems Service robots Medical robotics Laboratories Actuators Weapons Laser theory Power lasers

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