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Novel transient-energy-based directional pilot protection method for HVDC line

Protection and control of Modern Power systems 2017年第1期2卷 159-168页

作者： Guibin Zou Qiang Huang Shenglan Song Bingbing Tong Houlei Gao Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJi’nanChina. State Grid Weifang Electric Power Company Weifang 261021China. State Grid Langfang Electric Power Company Langfang 065000China.

This paper proposes a novel directional pilot protection method based on the transient energy for bipolar HVDC *** the positive direction of current is from DC bus to the DC line,in the case of an internal line fault,the transient energies detected on both sides of the line are all negative within a short time,which denotes the positive direction fault;while for an external fault,the transient energy on one end is positive,which means a negative direction fault,but the transient energy on the opposite end is negative,which indicates that the fault direction is *** to these characteristics,an integration criterion identifying fault direction is *** addition,through setting a fixed energy threshold,the faulted line and lightning disturbance can also be *** results from UHVDC transmission system show the validity of the proposed protection method.

关键词： Transient energy HVDC line Directional pilot protection Fault direction Lightning stroke

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Improved blending strategy for membrane modification virtue of surface segregation using surface-tailored amphiphilic nanoparticles

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Frontiers of Environmental Science & Engineering 2016年第6期10卷 113-121页

作者： Shuai Liang Peng Gao Xiaoqi Gao Kang Xiao Xia Huang College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

Membrane modification is one of the most feasible and effective solutions to membrane fouling proble.m which tenaciousl.y hampers .the furher au .gmentation of me .rnbrane *** *** modification with nanoparticles （NPs）, owing to the convenience of being incorporated in established ***. ction lines, possesses an advantag, eous viability in practical ***, the existing blending strategy suffers from a low utilization efficiency due to NP encasement by membrane matrix. The current study proposed an improved blending modification approach with amphiphilic NPs （aNPs）, which were prepared through silanization using 3-（Trimethoxysilyl）propyl methacrylate （TMSPMA） as coupling agents and ZnO or SiO2 as pristine NPs （pNPs）, *** Fourier transform infrared and X-ray photoelectron spectroscopy analyses revealed thepresence of appropriate organic components in both the ZnO and SiO2 aNPs, which verified the success of the silanization process. As compared with the pristine and conventional pNP-blended membranes, both the ZnO aNP-blended and SiO2 aNP-blended membranes with proper silanization （100% and 200% w/w） achieved a significantly increased blending efficiency with more NPs scattenng on the internal and external membrane surfaces under scanning electron microscope observation. This improvement contributed to the increase of membrane hydrophilicity. Nevertheless, an extra dosage of the TMSPMA led to an encasement of NPs, thereby adversely affecting the properties of the resultant membranes. On the basis of all the tests, 100% （w/w） was selected as the optimum TMSPMA dosage for blending modification for both the ZnO and SiO2 types.

关键词： Membrane modification Nanoparticle Hydrophilic Amphiphilic Blending

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Enhanced biodegradation of triclosan by means of gamma irradiation

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Chemosphere 2017年 167卷 406-414页

作者： Shizong Wang Yanan Yin Jianlong Wang Collaborative Innovation Center for Advanced Nuclear Energy Technology INET Tsinghua University Beijing 100084 PR China Beijing Key Laboratory of Radioactive Wastes Treatment Tsinghua University Beijing 100084 PR China. Beijing Key Laboratory of Radioactive Wastes Treatment Tsinghua University Beijing 100084 PR China State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing 100084 PR China. Electronic address: wangjl@***.

Triclosan is an antimicrobial agent which has been frequently detected in the environment. In this paper, the biodegradation of triclosan after radiation-induced advanced oxidation was investigated. The results show that the removal efficiency of triclosan in the combined irradiation and biological treatment process ranged from 88% to 97%, depending on the absorbed dose, while it was only 54% in the single biological treatment process. The removal efficiency of total organic carbon (TOC) was in the range of 53.1%,-59.2% at dose of 1-5 kGy in the combined irradiation and biological treatment process. In comparison, the removal efficiency of TOC in the single biological treatment process was 24.5%, suggesting that irradiation can enhance the mineralization of triclosan. The dechlorination efficiency of triclosan ranged from 48.6% to 78.4% at dose of 1-5 kGy. The intermediates of triclosan degradation were tentatively identified by LC-MS analysis and the possible degradation pathway was proposed. Based on the above results, the combined irradiation and biological treatment process could be an alternative process for treating triclosan-containing wastewater.

关键词： Advanced oxidation process Biodegradation Irradiation Mineralization Triclosan

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Novel Evaluation Method of Vehicle Suspension Performance Based on Concept of Wheel Turn Center

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 935-944页

作者： WANG Bo GUAN Hsin LU Pingping ZHAN Jun State Key Laboratory of Automobile Simulation and Control Jilin University

The current research of suspension performance evaluation is mixed in the evaluation of vehicle handling and ride comfort. However, it is lack of a direct and independent evaluation method for suspension performance. In this paper, a novel wheel turn center method is proposed to evaluate the suspension performance. This method is based on the concept and application of wheel turn center （WTC） and sprung mass turn center （SPTC）. The vehicle body and each wheel are regarded to be independent rigid bodies and have their own turn centers which reflect respective steering motions and responses. Since the suspension is the link between vehicle body and wheels, the consistence between the sprung mass turn center and the wheel turn center reflects the effect and performance of the suspension system. Firstly, the concept and appropriate calculation method of WTC and SPTC are developed. Then the degree of inconsistence between WTC and SPTC and the time that they achieve consistence, when the vehicle experiences from transient steering to steady steering state, are proposed to evaluate suspension performance. The suspension evaluation tests are conducted under different vehicle velocities and lateral accelerations by using CarSim software. The simulation results show that the inconsistence of steering motion between vehicle body and wheels are mainly at high speeds and low lateral accelerations. Finally, based on the proposed evaluation indexes, the influences of different suspension characteristic parameters on suspension performance and their matches to improve steering coordination are discussed. The proposed wheel turn center method provides a guidance and potential application for suspension evaluation and optimization.

关键词： suspension evaluation wheel turn center sprung mass turn center

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Robot Teaching by Teleoperation Based on Visual Interaction and Neural Network Learning

Robot Teaching by Teleoperation Based on Visual Interaction ...

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2017 9th International Conference on Modelling, Identification and control (ICMIC 2017)

作者： Yang Xu Chenguang Yang Junpei Zhong Hongbin Ma Lijun Zhao Min Wang Key Laboratory of Autonomous Systems and Networked Control College of Automation Science and EngineeringSouth China University of Technology National Institute of Advanced Industrial Science and Technology School of Automation Beijing Institution of Technology State Key Laboratory of Robotics and System Harbin Institute of Technology

Traditional methods of Robot teaching require human demonstrators to program with a teaching pendant,which is a complex and time-consuming *** this paper,we propose a novel method based on teleoperation which allows a demonstrator to train robot in an intuitive *** specifically,at the beginning the demonstrator controls a robot by visual *** then a learning algorithm based on radial basis function(RBF) network is used to transfer the demonstrator's motions to the *** verify the effectiveness of this developed methods,several simulation experiments have been carried out which based on Microsoft Kinect Sensor and the Virtual Robot Experimentation Platform(V-REP).The experimental results show that this method has achieved satisfactory *** the help of this method,the robot can not only complete the task autonomously after teaching,but also can learn the details of demonstrator's behavior.

关键词： Robot Teaching Teleoperation radial basis function(RBF) network

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Impact of alcohol gasoline on fuel consumption and tailpipe emissions of a China Ⅳ passenger car 35

Impact of alcohol gasoline on fuel consumption and tailpipe ...

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第35届中国控制会议

作者： ZHU Rencheng HU Jingnan BAO Xiaofeng HE Liqiang ZU Lei LI Yufei ZHANG Mi College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences

ISBN: (纸本)9781509009107

Application of renewable energy is an effective way to control the excessive petroleum consumption in transportation ***,there is a worthy concern about the applicability of alternative fuel on in-use vehicles and the variation of exhaust emissions when switching from the traditional gasoline to a new *** paper is aimed to investigate the impact of two typical kinds of alcohol gasoline,E10 and M15,on fuel consumption and tailpipe emissions of a late-model multi-port fuel injection（PFI） passenger vehicle over the worldwide harmonized light-duty test cycle（WLTC）.The results showed that fuel consumption and CO emissions of the test vehicle with both E10 and M15 were higher than that with gasoline.E10 reduced most of the gaseous and particulate emissions,except NOx,while M15 deteriorated the exhaust emissions seriously,especially for the THC and PN emissions those increased by approximately 3.4 and 4.6 *** most likely reason was that M15 did not match the configuration of engine and emission control system of this test *** studies about fuel consumption and tailpipe emissions after traditional gasoline replaced by alcohol gasoline has also revealed the deterioration when the alcohol gasoline didn't match the vehicle configuration,which would result in some negative impact on the atmospheric environment.

关键词： E10 M15 fuel consumption exhaust emissions

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A Headway control Algorithm for ACC Vehicles with the Compensation of the Preceding Vehicle Acceleration

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Procedia Engineering 2016年 137卷 669-679页

作者： Gao Zhenhai Yan Wei State Key Laboratory of automobile Simulation and Control Jilin University Changchun China

A headway control algorithm with the compensation of the preceding vehicle acceleration is proposed. Multi performances such as driving safety, passenger comfort and energy economy are considered to imitate car-following features of skilled drivers. To follow the preceding vehicle more stably and safely, the preceding vehicle acceleration is estimated via a differential tracker and a feedforward term with the input of estimated acceleration is added into the headway controller with a feedback term. The feedforward and feedback headway controller is designed via quadratic boundedness concept and the multi performances are coordinated by transforming the ranges of them into linear matrix inequalities. Finally, the car-following performance of the designed algorithm is verified under operating conditions in which the preceding vehicle speed is constant or changing.

关键词： Adaptive cruise control(ACC) Headway control coordination control constraint Quadratic boundedness

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A Single-Mobile-Anchor Based Distributed Localization Scheme for Sensor Networks 35

A Single-Mobile-Anchor Based Distributed Localization Scheme...

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第35届中国控制会议

作者： CHENG Peng HAN Tingrui ZHANG Xi ZHENG Ronghao LIN Zhiyun State Key Laboratory of Industrial Control Technology College of Electrical EngineeringZhejiang University Zhejiang Province Marine Renewable Energy Electrical Equipment and System Technology Research Laboratory

ISBN: (纸本)9781509009107

This paper investigates the distributed localization problem for a sensor network in the *** is assumed that one mobile robot wandering in the area acts as a mobile anchor.A distributed scheme is devised such that each node can localize itself using only its locally available distance measurements about its(possibly changing) *** key idea is based on a new way of calculating the bary centric coordinate of each node about its neighbors,which has the advantage that it is capable of handling distance measurement errors.A necessary and sufficient condition is obtained for the global convergence of the proposed distributed *** simulation and experiment using ZigBee devices are carried out to validate the proposed distributed localization scheme.

关键词： Sensor Network Distributed Localization ZigBee Device

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Semantic motion segmentation for urban dynamic scene understanding

Semantic motion segmentation for urban dynamic scene underst...

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2016 IEEE International Conference on Automation Science and Engineering, CASE 2016

作者： Fan, Qiu Yi, Yang Hao, Li Mengyin, Fu Shunting, Wang School of Automation State Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781509024094

A mount of recent researches on scene parsing and semantic labeling, while few focus on obtaining joint semantic motion labeling. In this paper, we propose an approach to infer both the object class and motion status for each pixel of images. First, we extract and match sparse image features to estimate ego-motion between two consecutive stereo images, the result of feature points grouping is used to segment moving object in U-disparity map. Second, a Fully Convolutional Neural Network is employed for semantic segmentation. Moreover, semantic cues are utilized to remove pixels have no potential to be moved in motion mask. Finally, we use a fully connected CRF to integrate motion into semantic segmentation. To validate the effectiveness of the proposed algorithm, we present experimental results with KITTI stereo images that contain moving objects. © 2016 IEEE.

关键词： Semantics

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Implementation of electric vehicle hardware-in-the-loop test platform

International Journal of Multimedia and Ubiquitous Engineeri...

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International Journal of Multimedia and Ubiquitous Engineering 2016年第1期11卷 147-158页

作者： Song, Chuanxue Xiao, Feng Peng, Silun State Key Laboratory of Automotive Simulation and Control Jilin University China

This paper presents a finite element model-based real-time simulation system for the permanent magnet synchronous motor (PMSM) driving system, which, in combination with the vehicle kinetic model, forms a complete electric vehicle (EV) hardware-in-the-loop (HIL) simulation and test platform. The software JMAG is used to establish the PMSM finite element model, and the platform of field-programmable gate array (FPGA) is adopted to construct the PMSM real-time simulation model. The finite element model is also retrieved to coordinate with the vehicle kinetic model in order to facilitate the testing and development of the controller of the EV, the matching of the driving system, the kinetics control algorithms, etc. Through comparing the real-time simulation of the motor driving system with the experimental results of the test bench, as well as analyzing the HIL simulation results of the entire vehicle model, this paper verifies the accuracy and effectiveness of this HIL simulation and test platform. © 2016 SERSC.

关键词： Finite element method

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