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检索条件"机构=School of Robotics and Automation Engineering"

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Investigating the effect of ultrasonic vibration on hole accuracy in drilling of metal matrix composites

Investigating the effect of ultrasonic vibration on hole acc...

引用

6th International Conference on Tribology in Manufacturing Processes and Joining by Plastic Deformation, ICTMP 2014

作者： Kadivar, Mohammadali Akbari, Javad Vakili Azghandi, Bijan Department of Mechanical Engineering Industries and Mines University Tehran Iran Tehran Iran Center of Excellence in Design Robotics and Automation School of Mechanical Engineering Sharif University of Technology Tehran Iran Center of Advanced Manufacturing and Material Processing Micro Mechanism Research Group Department of Engineering Design and Manufacture University of Malaya Malaysia School of Mechanical Engineering Amirkabir University of Technology Hafez street Tehran Iran

ISBN: (纸本)9783038351276

Generally in the drilling of new engineering materials such as metal matrix composites, problems frequently occur in terms of poor finished surface, tool stress, tool wear, high drilling forces as well as low process reliability. A useful and promising method to overcome these problems is the use of ultrasonic vibration as an assistance, where high-frequency and low amplitude vibration are added to the conventional movement of cutting tools or workpieces. This research presents the new design of an ultrasonic assisted system and the experimental investigation of ultrasonically assisted drilling of Al/SiC metal matrix composites under different cutting conditions. The effect of cutting conditions and ultrasonic amplitude on the circularity, cylindericity, and hole oversize of the ultrasonically and conventionally drilled workpieces were investigated. The obtained results show that the ultrasonic vibration can improve the hole quality. © (2014) Trans Tech Publications, Switzerland.

关键词： Cutting tools

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Research of Oil quality online monitoring system

Research of Oil quality online monitoring system

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2014 5th International Conference on Information Technology for Manufacturing Systems(ITMS 2014)

作者： Xiubo Luo Demin Xu Xiaomei Hu Northwestern Polytechnical University Shanghai Key Laboratory of Intelligent Manufacturing and Robotics School of Mechatronic Engineering and Automation Shanghai University

The quality of oil determines the status and life of the devices. However, most Chinese vessels have not equipped with on-line oil quality testing facilities. Therefore, a special on-line oil quality monitoring system for vessels is designed to real-time monitor of oil pollution change. An alarm signal or control signal based on the monitoring results is sent, which supports the purifier automatically and water, particles and gases are removed from the oil to maintain a good oil quality. The system is developed and implemented in the vessel corporation and has a good prospect of application. The application of this system will promote the process of the intelligent device management.

关键词： On-line monitoring Oil quality Intelligent device

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Research of Beam Domain MVDR and Motion Compensation

Research of Beam Domain MVDR and Motion Compensation

引用

2014 5th International Conference on Information Technology for Manufacturing Systems(ITMS 2014)

作者： Xiubo Luo Demin Xu Junjun Hu Xiaomei Hu Northwestern Polytechnical University Shanghai Key Laboratory of Intelligent Manufacturing and Robotics School of Mechatronic Engineering and Automation Shanghai University

Minimum variance distortionless response(MVDR) beamformer is a better target detection method, which provided high-resolution and anti-interference abilities. But the nice features will be degraded significantly for a fast bearing-rate target. Because the eigenvalue of longtime integral correlation matrix will spread, the signal and interference are no longer clearly identified by the eigenvectors. A beam domain MVDR and motion compensation arithmetic is given in this paper. The motion effect can be compensated by tracking the signal bearing change using real time estimated beam domain covariance matrix. The detection ability of moving target can be improved.

关键词： Beamforming MVDR Motion compensation

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Application Research of 3D Imaging Sonar System in Salvage Process

Application Research of 3D Imaging Sonar System in Salvage P...

引用

2014 2nd Asian Pacific Conference on Mechatronics and Control engineering(APCMCE 2014)

In the salvage process, data about the shape of shipwreck, sink sitting posture, buried degree and other related information should be required in order to develop salvage program. Three-dimensional imaging sonar is used to provide such data for salvage work by underwater acoustic detection and three-dimensional imaging technology. An application example is described and the results show the effectiveness.

关键词： Salvage process Imaging sonar Underwater acoustic detection

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A p300 model for cerebot - A mind-controlled humanoid robot 2

引用

2nd International Conference on Robot Intelligence Technology and Applications, RiTA 2013

作者： Li, Mengfan Li, Wei Zhao, Jing Meng, Qinghao Zeng, Ming Chen, Genshe Institute of Robotics and Autonomous Systems School of Electrical Engineering and Automation Tianjin University Tianjin300072 China Department of Computer & Electrical Engineering and Computer Science California State University BakersfieldCA93311 United States Intelligent Fusion Technology Inc. GermantownMD20876 United States

ISBN: (纸本)9783319055817

In this paper, we present a P300 model for control of Cerebot - a mind-controlled humanoid robot, including a procedure of acquiring P300 signals, topographical distribution analysis of P300 signals, and a classification approach to identifying subjects’ mental activities regarding robot-walking behavior. We design two groups of image contexts to visually stimulate subjects when acquiring neural signals that are used to control a simulated or real NAO robot. Our study shows that the group of contexts using images of robot behavior delivers better performance. © Springer International Publishing Switzerland 2014.

关键词： Anthropomorphic robots

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Design of a Micro-Nano Positioning Platform Based on Stick-Slip Driving

Design of a Micro-Nano Positioning Platform Based on Stick-S...

引用

2014 International Conference on Advanced Nano-Technology and Biomedical Material(ANTBM 2014)

作者： Qian-cheng Guo Shou-bin Liu Wei-bin Rong School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Graduate School State Key Laboratory of Robotics and System Harbin Institute of Technology

Micro-nano positioning platform is a core component for micro-nano operation. The static and dynamic characteristics of platform will determine its precision level. This paper presented a new 2-D micro-nano platform based on stick-slip driving. By using static structural module and modal analysis module of ANSYS software, the stress and natural frequency of pedestal were analyzed. The driving frequency of piezoelectric ceramic was selected far away from the natural frequency to avoid resonance. Dynamic performance of pedestal was also analyzed with ANSYS transient module. Simulation results show that the presented platform has excellent static and dynamic performance.

关键词： Micro-Nano Platform Stick-Slip SEM Simulation

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Conditioning of Vitrified Bond CBN grinding wheels using a picosecond laser 17

Conditioning of Vitrified Bond CBN grinding wheels using a p...

引用

17th International Symposium on Advances in Abrasive Technology, ISAAT 2014

作者： Zahedi, Ali Tawakoli, Taghi Akbari, Javad Azarhoushang, Bahman Furtwangen University SchwenningenBaden-W��rttemberg Germany Center of Excellence in Design Robotics and Automation School of Mechanical Engineering Sharif University of Technology Tehran Iran Center of Advanced Manufacturing and Material Processing - Micro Mechanism Research Group Department of Engineering Design and Manufacture University of Malaya Kuala Lumpur Malaysia

ISBN: (纸本)9783038352211

Laser ablation is a novel non-mechanical wheel preparation method for optimizing the treatment costs of superabrasive tools. In this study the thermal effects of picosecond laser radiation on CBN superabrasive grinding wheel surface is analytically and experimentally investigated. The analytical approach is intended to find threshold process parameters for selective ablation of cutting grains and bond material. It has been analytically and experimentally shown that, the extent of material degradation is defined by the maximum surface temperature induced by the laser radiation which is in turn defined by the laser beam energy. It is also suggested that, the depth of laser thermal effects is governed by the relative speed of the laser scanner with respect to the wheel surface. © (2014) Trans Tech Publications, Switzerland.

关键词： Grinding (machining)

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Immersion and Invariance based Adaptive Attitude Tracking Control of a Quadrotor UAV in the Presence of Parametric Uncertainty

Immersion and Invariance based Adaptive Attitude Tracking Co...

引用

第三十三届中国控制会议

作者： Bo Zhao Bin Xian Yao Zhang Xu Zhang The Institute of Robotics and Autonomous System the Tianjin Key Laboratory of Process Measurement and ControlSchool of Electrical Engineering and Automation Tianjin University

ISBN: (纸本)9781479947249

In this paper, a new adaptive controller for a quadrotor unmanned aerial vehicle(UAV) is presented via Immersion and Invariance(I&I) approach. The quadrotor's dynamic model is subjected to some uncertain parameters such as the inertial moments, aerodynamic damping coefficients and so on. In particular, the mass-eccentric effects by the payloads are also *** all these uncertainties above, the proposed adaptive controller is still capable of driving the quadrotor UAV's attitude asymptotically to a desired trajectory. The stability analysis is performed by Lyapunov techniques and LaSalle's invariance theorem. Numerical simulation results illustrate the good tracking performance of the proposed scheme.

关键词： quadrotor,UAV,adaptive control,immersion and invariance,I&I

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Trajectory tracking control of unmanned ship based on back-stepping algorithm

Trajectory tracking control of unmanned ship based on back-s...

引用

International Conference on Information and automation (ICIA)

作者： Shaorong Xie Dechao Wang Jun Luo Yan Peng Hengyu Li Shanghai Key Laboratory of Intelligent Manufacturing and Robotics Shanghai University Shanghai China School of Mechatronics Engineering and Automation Shanghai University

For the complexity of ocean environment, the motion of ship is a very complicated movement, it's very important to develop a suitable mathematical model to describe it quite exactly. Also the ship control system is a nonlinear, mutative and multi-variable system which poses many new problems and challenges for trajectory tracking control methods of unmanned ship. In this paper, a nonlinear mathematical model of under-actuated unmanned ships is developed. A state feedback control law of straight-line tracking control system is presented using the Lyapunov direct method and nonlinear back-stepping. Numerical simulation using Matlab/Simulink was provided to verify the validity of the proposed method.

关键词： Marine vehicles Mathematical model Trajectory Interference Tracking Robustness

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On the design and implementation of a tri-ellipsoid unmanned autonomous blimp

On the design and implementation of a tri-ellipsoid unmanned...

引用

IEEE/SICE International Symposium on System Integration

作者： Enhao Zheng Jingeng Mai Qining Wang The Robotics Research Group Peking University Beijing China School of Automation Science and Electrical Engineering Beihang University Beijing China

ISBN: (纸本)9781479969456

In this paper, we present the design and implementation of a tri-ellipsoid unmanned autonomous blimp. The tri-ellipsoid blimp has larger payload capacity and anti-wind ability compared with the conventional solo-ellipsoid ones, while it maintains the length and streamline structure. Based on the dynamic model and simulation results, we designed and implemented the prototype. The proposed blimp includes the tri-ellipsoid blimp body, the flying control system, and the ground communication station. To test the performance of the proposed system, we carried out field experiments. The blimp can finish the tasks of remote control and autonomous flying in the outdoor environment. Preliminary experimental results show that the proposed blimp is a prospective unmanned aerial vehicle for the tasks of the near-ground search.

关键词： Prototypes Control systems Shape Propellers Data visualization Aerodynamics Temperature sensors

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