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6th IFAC Symposium on Mechatronic Systems, MECH 2013

作者： Yuan, Shuai Liu, Lianqing Wang, Zhidong Xi, Ning Wang, Yuechao Dong, Zaili State Key Lab. Robot. SIA. Chinese Academy of Sciences Shenyang 110016 China Shenyang Jianzhu University Shenyang 110168 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China Dept. of Advanced Robotics Chiba Institute of Technology Chiba 275-0016 Japan Dept. of Electrical and Computer Engineering Michigan State University United States

ISBN: (纸本)9783902823311

The spatial uncertainties of atom force microscopy (AFM) tip position hinder the AFM based nano-manipulation. Although the landmark based tip localization can be applied to improve the tip position accuracy in the task space, the PZT nonlinearity and system drift are still a challenge to compensation performance when the tip is positioned far from the landmark. Therefore this paper proposes an active landmark configuration. This method first estimates the nearby area called as the landmark domain around the target position, and then actively manipulates the landmark into the landmark domain by using virtual hand to improve the positioning accuracy. Simulation and experiment illustrate the validity of the proposed method. © 2013 IFAC.

关键词： Nanotechnology

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Track-before-detect of weak ballistic target using elliptical hough transform

Track-before-detect of weak ballistic target using elliptica...

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IET International Radar Conference 2013

作者： Rao, Bin Zong, Zhi-Wei Nie, Yuanping State Key Lab. of Complex Electromagnetic Environ. Effects on Electron. and Info. Syst. Changsha 410073 China College of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9781849196031

A track-before-detect (TBD) algorithm based on elliptical Hough transform (EHT) is presented for jointly detecting and tracking weak ballistic targets during its exoatmospheric flight. The new method makes use of the fact that the ballistic target follows the elliptical orbit when restricted to two-body problem. The relationship between raw radar measurements in the data space and the elliptical parameters in the parameter space is established with coordinate transformations. The EHT detection algorithm is designed and the orbit planarity is also considered to reduce the noise accumulation effect. The detection performances related to primary and second thresholds and signal-to-noise ratio (SNR) are analyzed and verified through simulations. The advantage of the new method lies in it can not only detect and track weak ballistic targets but also can predict the impact point by using availab.e parameters.

关键词： Hough transforms

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Micro-doppler of non-ideal scattering centers

Micro-doppler of non-ideal scattering centers

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IET International Radar Conference 2013

作者： Liu, Jin Zhao, Feng Zhang, Yanqing Ai, Xiaofeng Yang, Jianhua State Key Lab. of Complex Electromagnetic Environ. Effects on Electron./Info. Syst. Changsha 410073 China College of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China Unit 61135 of PLA Beijing China

ISBN: (纸本)9781849196031

Non-ideal scattering centers exist commonly on radar targets. The scattering characteristics of them induce additional modulation or components to the micro-Doppler. Two typical kinds of non-ideal scattering centers are analyzed and micro- Doppler model of the scattering centers on the ring structure of precession targets are introduced as a detailed example. The experimental results demonstrate the model.

关键词： Radiation

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Wide-area backup protection algorithm based on multisource information fusion

Wide-area backup protection algorithm based on multisource i...

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2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： He, Zhiqin Zhang, Zhe Yin, Xianggen Li, Zhenxing Deng, Xing State Key Laboratory of Advanced Electromagnetic Engineering and Technology Electrical Power Security and High Efficiency Lab. Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781447124665

Wide-area backup protection is a novel technique presented in recent years, which uses multisource information to make fault identification decision and availab.y prevents catastrophic blackouts. However, the property of algorithm will be deteriorated when information error exists. For the sake of improving the property of wide-area backup protection, this paper proposes an information fusion strategy using genetic algorithm to optimize the decision-making function. The operation information from local directional pilot relay and impedance relay is applied to establish the fitness function. Simulation tests based on IEEE 3-generator and 9-bus system validates the presented algorithm under as many as 3 bits information error. © 2012 Springer-Verlag London Limited.

关键词： Genetic algorithms

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Analysis of the UHV tie line active power peak value of weak interconnected grids following power shortage disturbance in China power system

Analysis of the UHV tie line active power peak value of weak...

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2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： Hong, Feng Chen, Jinfu Duan, Xianzhong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Electrical Power Security and High Efficiency Lab. Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781447124665

An ultra high voltage (UHV) AC tie line that connects North China and Central China power grid has been put into operation in 2009. This paper presents a method to calculate the peak value of active power oscillation of the UHV AC tie line following power shortage disturbance. The typical process of the oscillation on the UHV AC line is analyzed. It is shown that the active power oscillation on tie line of week connection grid is similar with the step response of the second-order system. The oscillation peak value is closely related to fault location, system inertia, and system inter-area damping. The method and analysis are tested in China system. © 2012 Springer-Verlag London Limited.

关键词： Electric power transmission networks

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Study on unbalance factor of sequence impedance for parallel multi-circuit cable lines

Study on unbalance factor of sequence impedance for parallel...

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2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： Deng, Xing Yin, Xianggen Zhang, Zhe He, Zhiqin Li, Zhenxing State Key Laboratory of Advanced Electromagnetic Engineering and Technology Electrical Power Security and High Efficiency Lab. Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781447124665

Parallel multi-circuit cable lines are wildly used to improve the transmission capacity of urban power grid, but the study on sequence impedance parameters' asymmetry of multi-circuit cable lines is not availab.e. To analyze the asymmetry of multi-circuit cable lines' parameters, a method to measure the unbalance factor is introduced in this paper. Furthermore, take engineering practice as an example, the electromagnetic unbalance factor of two-circuit cable lines under different arrangements are calculated by this method. Finally, a comparison among these unbalance factor is made. The comparative results show that the triangle arrangement has better symmetry than straight-vertical and straight-horizontal arrangement, in which the triangle-vertical arrangement's symmetry is the best. © 2012 Springer-Verlag London Limited.

关键词： Timing circuits

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Active Landmark Configuration for Accurate Nano-Positioning

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IFAC Proceedings Volumes 2013年第5期46卷 594-599页

作者： Shuai Yuan Lianqing Liu Zhidong Wang Ning Xi Yuechao Wang Zaili Dong State Key Lab. Robot. SIA. Chinese Academy of Sciences Shenyang 110016 China Shenyang Jianzhu University Shenyang110168 Chinae Graduate University of the Chinese Academy of Sciences Beijing 100039 China Dept. of Advanced Robotics Chiba Institute of Technology Chiba 275-0016 Japan Dept. of Electrical and Computer Engineering Michigan State University US

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Cooperative and Active Sensing in Mobile Sensor Networks for Scalar Field Mapping

Cooperative and Active Sensing in Mobile Sensor Networks for...

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IEEE International Conference on Automation Science and engineering

作者： Hung Manh La Weihua Sheng Jiming Chen Center for Advanced Infrastructure and Transportation (CAIT) Rutgers University Piscataway NJ 08854 USA School of Electrical and Computer Engineering Oklahoma State University Stillwater OK 74078 USA State Key Lab. of Industrial Control Technology Department of Control Zhejiang University Hangzhou P.R.China 310027

ISBN: (纸本)9781479915132

Scalar field mapping has many applications including environmental monitoring, search and rescue, etc. In such applications there is a need to achieve a certain level of confidence regarding the estimates at each location. In this paper, a cooperative and active sensing framework is developed to enable scalar field mapping using multiple mobile sensor nodes. The cooperative and active controller is designed via the real-time feedback of the sensing performance to steer the mobile sensors to new locations in order to improve the sensing quality. During the movement of the mobile sensors, the measurements from each sensor node and its neighbors are taken and fused with the corresponding confidences using distributed consensus filters. As a result an online map of the scalar field is built with a certain level of confidence of the estimates. We conducted computer simulations to validate and evaluate our proposed algorithms

关键词： Active sensing Sensor fusion Sensor networks

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Guest editorial special issue on atmospheric pressure plasma jets and their applications

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IEEE Transactions on Plasma Science 2012年第11 PART1期40卷 2786-2787页

作者： Shladover, Xinpei Karakas, Erdinc State Key Laboratory of Advanced Electromagnetic Science and Technology Lab HuaZhong University of Science and Technology Wuhan 430074 China Plasma Processing Lab Chemical and Biomolecular Engineering Department University of Houston Houston TX 77204 United States

The 25 papers in this special issue focus on atmospheric pressure jets and their applications.

关键词： Special issues and sections Plasma applications

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Investigation of transient flow in slab.continuous casting of steel with EMBr and evaluation using nail dipping measurement

Investigation of transient flow in slab continuous casting o...

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2012 AIST Steel Properties and Applications Conference, Held in Conjunction with the Materials Science and technology 2012 Conference and Exhibition, MS and T 2012

作者： Ji, Chuanbo Li, Jingshe Ma, Yu Zhang, Tongbo School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China State Key Lab. of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China

ISBN: (纸本)9781935117278

electromagnetic brake (EMBr) has been applied in the molten steel to control the meniscus characteristics and stabilize the meniscus fluctuation. The nail dipping method has been developed to actively determine the mold top surface velocity in a certain slab.caster. The shape of the meniscus profile and direction of flow are quantified by analyzing the angular profile of the lump for each solidified nail, which indicates that the meniscus level fluctuates with time variation and the EMBr can make the meniscus level flatter and lower. The correlation between the height difference of the solidified lump on the nail and surface velocity is confirmed and extended. The error evaluation for each lump measurement is also discussed. Furthermore the effect of magnetic field on the fluid flow in the mold has been investigated.

关键词： Continuous casting

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