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检索条件"任意字段=Conference on Machine Tool, In-Line, and Robot Sensors and Controls"

共 31 条记录，以下是21-30 订阅

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Design and modeling of integrated Hall-effect sensor based on-line thickness measurement device for incremental sheet forming processes

Design and modeling of integrated Hall-effect sensor based o...

引用

IEEE/ASME International conference on Advanced Intelligent Mechatronics

作者： Paniti, Imre Paroczi, Annamaria Hungarian Acad Sci Comp & Automat Res Inst Kende 13-17 H-1111 Budapest Hungary Budapest Univ Technol & Econ Dept Mechatron Opt & Engn Informat Budapest Hungary

ISBN: (纸本)9781457708398

The use of Numerical Control and computers in manufacturing has enabled the development of new sheet forming processes. One of these flexible processes is called Incremental Sheet Forming (ISF) in which deformation is localized by the movement of a spherical or flat forming tool. ISF is carried out regularly by a CNC machine tool or by a robot, which follows a tool-path generated by CAM programs, without the need for costly dies. Despite research progresses in understanding the deformation mechanism in ISF the process still needs a further optimization to guarantee the reliability required for industrial applications. This paper deals with the design of a new smart forming tool, applying FEM modeling and simulation, which is able to measure one of the key process parameters: the sheet thickness during the forming process. The authors analyze the possibility to use a Hall-effect sensor integrated into the forming tool for more precise on-line thickness measurement than what can be found in the literature and first results are reported.

关键词： CAM programs CNC machine tool FEM modeling FEM simulation Finite element methods Force Hall effect transducers Magnetic field measurement Magnetic flux density Materials Thickness measurement computer aided manufacturing finite element analysis forming processes forming tool incremental sheet forming processes integrated hall-effect sensor machine tools numerical control online thickness measurement device production engineering computing sensors sheet metal processing thickness measurement

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machine Design 2002年第13期74卷 150-150页

作者： Anon University of Mining and Metallurgy Krakow Poland

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Combined vision/force control at corners in planar robotic contour following

Combined vision/force control at corners in planar robotic c...

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IEEE/ASME (AIM) International conference on Advanced Intelligent Mechatronics

作者： J. Baeten J. De Schutter Department of Mechanical Engineering Katholieke Universiteit Leuven Heverlee Belgium

ISBN: (纸本)0780367367

The accuracy and execution speed of a force controlled contour following task is limited if the shape of the workpiece is unknown. This is even more true when the workpiece contour contains corners. This paper shows how a combined vision/force control approach at corners in planar contour following results in a more accurate and faster executed task. The vision system is used to measure on-line the contour and to watch out for corners. The edge is correctly located by incorporating the compliance of the tool/camera set-up in the contour measurement. A simple corner detection algorithm is presented. Once a corner is detected, the finite state controller is activated to take the corner in the best conditions. Experimental results are presented to validate the approach.

关键词： Force control robot vision systems Cameras Force sensors Calibration machine vision End effectors Optical distortion Shape control Watches

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Experiments in autonomous driving with concurrent goals and multiple vehicles

Experiments in autonomous driving with concurrent goals and ...

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IEEE International conference on robotics and Automation

作者： Brumitt, B Hebert, M Carnegie Mellon Univ Inst Robot Pittsburgh PA 15213 USA

ISBN: (纸本)078034300X

In this paper we report on experiments with a system for autonomously driving two vehicles based on complex mission specifications. We show that the system is able to plan local paths in obstacle fields based on sensor data, to plan and update global paths to goals based on frequent obstacle map updates, and to modify mission execution, e.g., the ordering of the goals, based on the updated paths to the goals. Two recently developed sensors are used for obstacle detection: a high-speed laser rangefinder and a video-rate stereo system. An updated version of a dynamic path planner D*, is used for on-line computation of routes. A new mission planning and execution monitoring tool, GRAMMPS, is used for managing the allocation and ordering of goals between vehicles. We report on experiments conducted in an outdoor test site with two HMMWVs. Implementation details and performance analysis, including failure modes, are described based on a series of twelve experiments, each over 1/2 km distance with up to nine goals. This system is the first multi-vehicle and multi-goal system to be demonstrated in real, natural environments with this degree of generality. The work reported here includes a number of results not previously published, including the use of a real-time stereo machine, a highperformance laser rangefinder and the GRAMMPS planning system.

关键词： Intelligent vehicle highway systems

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machine tool, in-line, and robot sensors and controls

Machine Tool, In-Line, and Robot Sensors and Controls

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machine tool, in-line, and robot sensors and controls

ISBN: (纸本)0819419591

The proceedings contains 25 papers. Some of the specific topics discussed are: development of multifinger robot hand with vibration fingers;orientation and stacking of parts based on internal features;development of an intelligent vibration gripper;CCD-based POSTNET bar-code reader;data-driven control of sonar array transducers;and advances in acoustic emission energy estimation.

关键词： machine tools

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Development of multi-finger robot hand with vibration fingers

Development of multi-finger robot hand with vibration finger...

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conference on machine tool, in-line, and robot sensors and controls

作者： Nakamura, K Honda, S SCI UNIV TOKYO FAC SCI & TECHNOLDEPT APPL ELECTRNODACHIBA 278JAPAN

ISBN: (纸本)0819419591

A multi-finger robot which can handle three dimensional objects of unknown weight and unknown surface conditions with the most suitable grasping force has been developed. The hand has three fingers. Each finger is composed of a torsional vibration system consisting of a damping roller, a vibration roller, a rotational support spring, and a rotational absorber spring. A small motor with an eccentric mass mounted on its shaft is placed in each vibration roller. Harmonic torque is generated in each vibration roller by rotating the eccentric mass, so that the vibration rollers and damping rollers are forced to vibrate. Through the initial grasping process, the object is handled by the vibration rollers with the most suitable grasping force. In this paper, the most suitable grasping force is derived through theoretical analysis.

关键词： grasping force multi-finger robot hand torsional vibration system rotary dynamic absorber

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Orientation and stacking of parts based on internal features

Orientation and stacking of parts based on internal features

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conference on machine tool, in-line, and robot sensors and controls

作者： Mankame, A Jouaneh, M Datseris, P UNIV RHODE ISL DEPT MECH ENGN & APPL MECHCTR AUTOMAT & ROBOT RESKINGSTONRI 02881

ISBN: (纸本)0819419591

Orientation and stacking of parts has been mostly based on their external features. There are a number of parts which need to be oriented and stacked based on internal features, either because internal features are of primary importance or because of lack of appropriate external features. Issues concerning the orientation and stacking of parts based on their internal features are investigated and two-dimensional axi-symmetrical parts have been classified into groups based on both internal and external features. Fundamental methodologies have been developed for orienting and stacking of parts based on internal features and experimental verification has been performed for many cases. Results indicate that parts can be oriented efficiently and at high speeds. In addition, it can be concluded from these experiments that in many cases, the widely accepted rule that orientational position of parts should be preserved does not necessarily hold.

关键词： part orientation part stacking internal features high speed automation

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Incremental motion encoder: a sensor for the integrated condition monitoring of rolling element bearings in machine tools

Incremental motion encoder: a sensor for the integrated cond...

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machine tool, in-line, and robot sensors and controls

作者： Ayandokun, Kayode A. Orton, P.A. Sherkat, Nasser Thomas, Peter D. Poliakoff, Janet F. Nottingham Trent Univ. Nottingham UK

ISBN: (纸本)0819419591

Modern industry increasingly demands that machine tools operate continuously as elements within computer integrated manufacturing cells. Accurate monitoring of machine condition is the key to predicting failures that would result in quality defects or costly unplanned production stoppages. This paper presents research into the use of a novel rotary motion sensor for the condition monitoring of rolling element bearings. This sensor, the incremental motion encoder (IME), is based upon a patented development of the optical encoder commonly used in machine tools for sensing angular position and rotational speed. The IME combines these measurements with that of shaft center position in two dimensions. This motion of the shaft center is directly related to the condition of the bearings supporting the shaft. To illustrate the IME principle experimental results showing the ability of the sensor to distinguish between bearing defects and external sources of vibration are presented. Measurement of shaft loading with the sensor is also described. Currently machine tool condition is most often measured by external sensors, such as accelerometers or acoustic emission transducers, which are not parts of the machine itself. The IME is ideally suited to being designed into a machine tool so as to integrate a condition monitoring facility into the computer control of the machine. The paper concludes by describing the current technology which allows sensors based on the IME principle to be integrated directly into rolling element bearings for this purpose.

关键词： Computer integrated manufacturing

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Comparison of neural network and cluster analysis techniques for the reliability of high-speed machinery

Comparison of neural network and cluster analysis techniques...

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machine tool, in-line, and robot sensors and controls

作者： Matthews, Colin P. Clark, J.Y. Sharkey, Paul M. Warwick, K. Univ. of Reading Whiteknights Berkshire UK

ISBN: (纸本)0819419591

This paper presents a comparison of three differing methods applied to the analysis of control data from a high speed machinery application. The source data and the pre-processing applied to improve the suitability of the data to the analysis techniques is discussed. The methods compared are cluster analysis, multi-layer perceptron neural networks and self organizing feature maps. The aim of the work is to determine the merits of the techniques in separating normal running operation from faulty operation. The methodology used with each technique is explained and results are computed so as to give the fairest comparison of their respective abilities. Additionally, the ways in which such techniques would be integrated into a final system for the analysis, diagnosis, and control of a high speed machine to give improved reliability are discussed.

关键词： machine tools

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TELEPRESENCE APPLICATION FOR REAL TASK EFFICIENCY IMPROVEMENT IN A WIDE AND HOSTILE ENVIRONMENT

TELEPRESENCE APPLICATION FOR REAL TASK EFFICIENCY IMPROVEMEN...

引用

conference on Telemanipulator and Telepresence Technologies

作者： MEREGALLI, A BRIZZI, A PERUCELLI, G CESI ROBOT LABMILANITALY

ISBN: (纸本)081941686X

The goal of the project is to investigate new features or devices for teleoperated control and man-machine interfaces, with the aim of improving the efficiency and productivity in a real task. The telepresence project here reported has been realized jointly by the robotics Laboratory of CESI and the robotics Laboratory of Milan Polytechnic. In this application we have fused different technologies coming from the remote control field and virtual reality technology, trying to maintain the system simply and cheaply. The real task application used as reference for the project has been a robotized mechanical blade, built on a tracked mobile platform, with an on board VME based controller. The system has been equipped with a stereo vision tool, a system for position and orientation computing, and other on-board sensors. A control architecture implementing remote human supervision and on-board security check has been realized using a self-made telepresence system with head mounted displays and a head movement tracking system. This telepresence technology could be applied in several fields and for several purposes;in our activity range we have found practical application both in underwater teleoperated vehicles and in live line inspection and maintenance systems for high voltage lines. Several test series have been carried out in order to test the efficiency of the teleoperated system and the efficacy of the man-machine interface. These tests, that have concerned the areas of navigation, manipulation, and visual inspection, have shown benefits that a teleoperated system can obtain from a special tool devoted to integrate different sensor technologies and features with the human sensorial apparatus.

关键词： TELEPRESENCE TECHNOLOGY TELEOPERATED CONTROL MAN-machine INTERFACES HEAD-MOUNTED DISPLAYS

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