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检索条件"机构=Robotics and Intelligent Systems Laboratory Electrical and Computer Engineering"

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Key-frame extraction for video captured by smart phones

Key-frame extraction for video captured by smart phones

引用

IEEE International Conference on robotics and Biomimetics

作者： Shuangshuang Ji Huaping Liu Bin Wang Fuchun Sun School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai China Department of Computer Science and Technology State Key Laboratory of Intelligent Technology and Systems Beijing P.R.China Beijing Baidu Netcom Science Technology Co. Ltd

ISBN: (纸本)9781479927456

In this paper, the key-frame extraction for video clips which are captured by smart phones are investigated. A weighted temporal consistent fuzzy clustering technology is used to cluster the video frames. The image-level feature and the orientation information are combined into the feature vector and the accelerate values are used to determine the weight. Such a method sufficiently exploits the spatio-temporal characterizes of the video clips captured by smart phones. The algorithm is implemented in a Sumsung Nexus S smart phone and we make an extensive experimental validation.

关键词： Smart phones Accelerometers Feature extraction intelligent sensors Acceleration Vectors

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Day Ahead Scheduling of Distribution System With Distributed Energy Resources Considering Demand Response and Energy Storage

Day Ahead Scheduling of Distribution System With Distributed...

引用

North American Power Symposium

作者： Mojtaba Khanabadi Sukumar Kamalasadan Power Energy and Intelligent Systems Laboratory (PEISL) Department of Electrical and Computer Engineering University of North Carolina at Charlotte

ISBN: (纸本)9781479912537

This paper propose a method for day-ahead optimization of distribution system with Distributed Energy Resources (DER's) and energy storage devices that allows a) increase market efficiency and b) damping the variations of DER's. The objective is to utilize energy storage to damp the variations in the grid considering market price and to increase the grid efficiency. First, the implementation of day-ahead optimization that will determine which generation unit including DER's should be utilized using next 24 hour load taking into consideration of renewable energy generation forecasting is discussed. Next, the utilization of energy storage to damp the energy variations in the grid is evaluated. The problem is formulated as Nonlinear Programming (NLP) with the objective of maximizing the social welfare of the grid. The results show that the proposed method can successfully fulfill the overall objectives.

关键词： energy storage distributed energy resources dispensing system Demand-Responsive Grid computing Energy sources absorption of shock Social Welfare Energy storage devices dinitrophenyl-aminopropyl-methylamine

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Multiple Model Adaptive Estimation for open loop unstable plants

Multiple Model Adaptive Estimation for open loop unstable pl...

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European Control Conference (ECC)

作者： Vahid Hassani António M. Pascoal A. Pedro Aguiar Michael Athans LARSyS Portugal Norwegian Marine Technology Research Institute (MARINTEK) Trondheim Norway The Laboratory of Robotics and Systems in Engineering and Science (LARSyS) Univ. Técnica de Lisboa (UTL) Lisbon Portugal LARSyS and the Dept. of Electrical and Computer Engineering University of Porto (FEUP) Porto Portugal

ISBN: (纸本)9781479901890

This paper addresses the problem of adaptive state and parameter estimation of open loop unstable plants using a multiple model structure. A state estimate is obtained as a probabilistically weighted sum of the estimates produced by a bank of individual observers. Model identification and convergence of the dynamic weights in the Multiple Model Adaptive Estimation (MMAE) for open-loop unstable plants are analyzed and the effect of the control action (by a controller in the loop) is studied. In the present paper we show that the techniques introduced in MMAE for open-loop stable plants and in the absence of control action are applicable to open-loop unstable plants with a stabilizing controller in the loop. A distance-like pseudo norm between the true plant and the identified model is developed and furthermore we show that the model identified is the one that is the closest to the true plant model in the defined norm among all models in the bank. The performance and convergence of the MMAE procedure are illustrated with Monte-Carlo simulation runs using the model of an inverted pendulum installed on a system of masses, springs, and dampers.

关键词： Adaptation models Mathematical model Observers Silicon Adaptive estimation

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Real-Time Simulation for Active and Reactive Power Control of Doubly Fed Induction Generator

Real-Time Simulation for Active and Reactive Power Control o...

引用

North American Power Symposium

作者： Rabindra Maharjan Sukumar Kamalasadan Power Energy and Intelligent Systems Laboratory (PEISL) Department of Electrical and Computer Engineering University of North Carolina at Charlotte

ISBN: (纸本)9781479912537

In this paper real-time modeling and simulation of complete closed loop control of doubly fed induction generator (DFIG) for wind generation system is presented. Decoupled active power and reactive power control of DFIG is realized using the flux oriented vector control. Inner and outer loop controller at rotor side and the grid side converter is presented for the closed loop control of the DFIG using real-time digital simulator. The simulation is carried on OPAL-RT digital simulator which is based on RT-LAB platform with the models build in Simulink. Further full closed loop models are evaluated in an experimental test bed for the step response of active and reactive power (P and Q) change. The real-time modeling and evaluation shows the capability of fully closed loop control and has greater impact on real-world applications.

关键词： Doubly Fed Induction Generator (DFIG) Vector control Real time simulation

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Frequency Stability and Control of a Power System with Large PV Plants Using PMU Information

Frequency Stability and Control of a Power System with Large...

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North American Power Symposium

作者： Abdlmnam Abdlrahem Ganesh K. Venayagamoorthy Keith A. Corzine Real-Time Power and Intelligent Systems (RTPIS) Laboratory Holcombe Dept. of Electrical and Computer Engineering Clemson University

ISBN: (纸本)9781479912537

Integrating large photovoltaic (PV) plants into the grid poses challenges to maintaining the system's stability during small and large disturbances. A PV system's output power fluctuates according to the weather conditions (irradiance and temperature), season, and geographic location. The power fluctuations of the PV plants raise frequency and voltage stability issues. This paper presents the impact of a large PV plant on the frequency stability of a power system under small and large disturbances. With automatic generation control and phasor measurement unit information, the power generations of conventional generators are adjusted to mitigate the frequency deviation. Furthermore, the effects of increased PV penetration in a given power system area are examined.

关键词： power systems Frequency stability Polydnaviridae Phasor measurement units System stability Automatic generation control Frequency deviation Energy sources Standing Orders

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An LMI-based finite-time tracker design using nonlinear sliding surfaces

An LMI-based finite-time tracker design using nonlinear slid...

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20th Iranian Conference on electrical engineering, ICEE 2012

作者： Mobayen, Saleh Johari Majd, Vahid Sojoodi, Mahdi Intelligent Control Systems Laboratory School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran

ISBN: (纸本)9781467311489

This paper offers a new nonlinear sliding surface to achieve robustness and high performance for uncertain MIMO linear systems. The proposed method improves the transient performance and steady state accuracy simultaneously in a finite time. Exponential boundedness and ultimately boundedness conditions in finite time are provided in the form of linear matrix inequalities (LMIs). The control law is designed to guarantee the existence of the sliding mode around the nonlinear surface, and the damping ratio of the closed-loop system is increased as the output approaches the set-point. A DC motor position tracking problem is considered as a case study. Simulation results are presented to show the effectiveness of the proposed method as a promising way for controlling similar nonlinear systems. © 2012 IEEE.

关键词： Sliding mode control

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Tracker design using composite nonlinear feedback with application to a DC servomotor

Tracker design using composite nonlinear feedback with appli...

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2012 3rd Power Electronics, Drive systems and Technologies Conference, PEDSTC 2012

作者： Mobayen, Saleh Majd, Vahid Johari Intelligent Control Systems Laboratory School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran

ISBN: (纸本)9781467301114

In this paper, the theory of a nonlinear control technique, i.e., the composite nonlinear feedback control is considered for robust tracking of a class of linear systems with time varying uncertain parameters and disturbances. This controller can guarantee that the tracking error decreases asymptotically to zero in the presence of time varying uncertain parameters and disturbances. For performance improvement of dynamical system, this proposed robust tracking controller consists of linear and nonlinear feedback parts without any switching element. The linear feedback law is designed to yield a closed loop system with a small damping ratio for the existence of a quick response. On the other hand, the nonlinear feedback law is designed to increase the damping ratio as the system output approaches the output of the reference model. Finally, the simulations of applying the control law on a DC servomotor positioning system are given to illustrate the validity of the results developed in this paper. © 2012 IEEE.

关键词： Closed loop systems

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Robot ontologies for sensor- and Image-guided surgery

Robot ontologies for sensor- and Image-guided surgery

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International Workshop on Robot Sensing (ROSE)

作者： Tamás Haidegger Marcos Barreto Paulo J. S. Goncalves Maki K. Habib S. Veera Ragavan Howard Li Alberto Vaccarella Roberta Perrone Edson Prestes Austrian Center for Medical Innov. and Techn. (ACMIT) Wiener Neustadt Austria UFBA Distributed Systems Laboratory (LaSiD) Brazil IDMEC Center of Intelligent Systems Portugal The American University in Cairo Cairo Egypt Monash University Selangor Malaysia Dept. of Electrical and Computer Engineering University of New Brunswick Canada Dept. of Electronics Information and Bioengineering (DEIB) NearLab Medical Robotics Milan Italy UFRGS Instituto de Informática Brazil

Robots and robotics are becoming more complex and flexible, due to technological advancement, improved sensing capabilities and machine intelligence. Service robots target a wide range of applications, relying on advanced Human-Robot Interaction. Medical robotics is becoming a leading application area within, and the number of surgical, rehabilitation and hospital assistance robots is rising rapidly. However, the complexity of the medical environment has been a major barrier, preventing a wider use of robotic technology, thus mostly teleoperated, human-in-the-loop control solutions emerged so far. Providing smarter and better medical robots requires a systematic approach in describing and translating human processes for the robots. It is believed that ontologies can bridge human cognitive understanding and robotic reasoning (machine intelligence). Besides, ontologies serve as a tool and method to assess the added value robotic technology brings into the medical environment. The purpose of this paper is to identify relevant ontology research in medical robotic, and to review the state-of-the-art. It focuses on the surgical domain, fundamental terminology and interactions are described for two example applications in neurosurgery and orthopaedics.

关键词： Robot sensing systems Surgery Lead Ontologies Biomedical optical imaging

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A new hand exoskeleton device for rehabilitation using a three-layered sliding spring mechanism

A new hand exoskeleton device for rehabilitation using a thr...

引用

IEEE International Conference on robotics and Automation

作者： Jumpei Arata Keiichi Ohmoto Roger Gassert Olivier Lambercy Hideo Fujimoto Ikuo Wada Department of Computer Science and Engineering Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 Japan. Rehabilitation Engineering Laboratory Institute of Robotics and Intelligent Systems ETH Zurich 8092 Zurich Switzerland. Department of Rehabilitation Nagoya City University Hospital 1-Kawasumi MIzuho-cho Mizuho-ku Nagoya 467-8602 Japan.

ISBN: (纸本)9781467356404

In this paper, a new hand exoskeleton device using a three-layered sliding spring mechanism is presented. In contrast to state of the art hand exoskeleton mechanisms (typically link, wire or pneumatically driven), the proposed mechanism is driven through large deformations of the compliant mechanism body. The mechanism can be made compact and lightweight by adequately positioning the compliant elements. In addition, the mechanism is designed to distribute 1-DOF actuated linear motion into three rotational motions of the finger joints, which translate into natural finger flexion/extension. The primary applicatoin of the proposed mechanism is to provide robotic support during physical therapy at the hospital (e.g. Continuous Passive Motion). However, thanks to its light and wearable structure, the proposed device could also be used at home as an assistive/therapeutic device to support activities of daily living. We introduce the mechanical structure of the three-layered sliding spring mechanism, present a prototype implementation as a hand exoskeleton device, and provide a preliminary evaluation.

关键词： three-layered sliding spring mechanism art hand exoskeleton mechanisms compliant mechanism body

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REAL-TIME SUPER-RESOLUTION FOR DIGITAL ZOOMING USING FINITE KERNEL-BASED EDGE ORIENTATION ESTIMATION AND TRUNCATED IMAGE RESTORATION

REAL-TIME SUPER-RESOLUTION FOR DIGITAL ZOOMING USING FINITE ...

引用

IEEE International Conference on Image Processing

作者： Wonseok Kang Jaehwan Jeon Eunsung Lee Changhun Cho Junghoon Jung Taechan Kim Aggelos K. Katsaggelos Joonki Paik Image Processing and Intelligent Systems Laboratory Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University Seoul Korea System LSI Samsung Electronics Co. Ltd Suwon Korea Department of Electrical Engineering and Computer Science Northwestern University Evanston IL 60208 USA

ISBN: (纸本)9781479923427

This paper presents a novel real-time super-resolution (SR) method using directionally adaptive image interpolation and image restoration. The proposed interpolation method estimates the edge orientation using steerable filters and performs edge refinement along the estimated edge orientation. Bi-linear and bi-cubic interpolation filters are then selectively used according to the estimated edge orientation for reducing jagging artifacts in slanting edge regions. The proposed restoration method can effectively remove image degradation caused by interpolation using the directionally adaptive truncated constrained least-squares (TCLS) filter. The proposed method provides high-quality magnified images which are similar to or better than the result of advanced interpolation or SR methods without high computational load. Experimental results indicate that the proposed system gives higher peak-to-peak signal-to-noise ratio (PSNR) and structural similarity (SSIM) values than the state-of-the-art image interpolation methods.

关键词： Super-resolution image interpolation image restoration digital zooming

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