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第四届国际自动化测试与仪器仪表学术会议

作者： Chen Jian Li Dong Liu Guili Wang Yanlin Key Laboratory of Measurement and Control of Electromechanical System Beijing Information Science &Technology University

Based on the π network,This paper puts forward an efficient measurement *** terms of hardware design,the system uses an ARM chip STM32F103ZET6 as the core of controlling module and the DDS chip AD9852 as the signal *** AD8302 joins the system to test the phase difference.A mixer circuit reduces frequencies and keeps constant phase of the signal before the AD8302,which improves the measurement *** for software design,a new algorithm based on sliding windowwas proposed to search the frequency more *** new algorithm takes much less time contrasting the traditional test methods to the new ones,which makes great contributions to the efficiency of the system.

关键词： quartz crystal series resonance frequency algorithm

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Development of the Ground control Station for a quadrotor unmanned aerial vehicle based on Java programming

Development of the Ground Control Station for a quadrotor un...

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31st Chinese control Conference, CCC 2012

作者： Yang, Liu Bin, Xian Fu, Wang Shibo, Liu Xun, Gu Tianjin Key Laboratory of Process Measurement and Control Institute of Robotics and Autonomous System Tianjin University Tianjin 300072 China

ISBN: (纸本)9789881563811

The four-rotor unmanned aerial vehicle (UAV), known as quadrotor UAV, has been a hot area for the research of unmanned aerial vehicles. Ground control Station (GCS), as an essential part of quadrotor UAV system, plays a very important role in applications of quadrotor UAV. Most ordinary GCS are stand alone ones, and lack extending abilities. Considering this defect and the real requirements of monitoring and control of UAV, this paper provides a new GCS based on VC++ and Java programming techniques. The major novelty of this GCS is of the Web access to real-time flight data. Plus, the proposed GCS posses the standard functions, such as data receiving in real time, storing the data and displaying the data. Experiment results are provided to show that the GCS operates well, with good human-machine interaction and extending abilities. © 2012 Chinese Assoc of Automati.

关键词： Unmanned aerial vehicles (UAV)

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The Improved Robust Model Predictive control with Mixed H 2 /H ∞ control Approach

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Acta Automatica Sinica 2012年第6期38卷 944-949页

作者： He HUANG De-Wei LI Yu-Geng XI Key Laboratory of System Control and Information Processing Ministry of Education Department of Automation Shanghai Jiao Tong University Shanghai 200240 China

Considering the linear time invariant (LTI) system with additive disturbance, a synthesis method of robust model predictive control (RMPC) is proposed, which is based on the mixed H 2 /H ∞ approach so as to balance the control performance and the capability of disturbance rejection. In order to reduce the conservativeness, a multi-step control strategy is introduced to improve the control performance and enlarge the feasible region of MPC. Meanwhile, an efficient version of RMPC is also developed to reduce the online computational burden, which makes the design more practical. Numerical examples illustrate the effectiveness of the proposed methods.

关键词： Model predictive control (MPC) multi-step control strategy mixed H 2 /H ∞ robust

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Association analysis between symptoms (signs) and syndromes of chronic gastritis based on associated density

Association analysis between symptoms (signs) and syndromes ...

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2012 International Conference on system Simulation, ICUSS 2012

作者： Liu, G.P. Li, G.Z. Yan, S.X. Li, F.F. Fu, J.J. Zhen, R.W. Laboratory of Information Access and Synthesis of TCM Four Diagnosis Basic Medical College Shanghai University of Traditional Chinese Medicine Shanghai 201203 China Key Laboratory of Embedded System and Service Computing Department of Control Science and Engineering Tongji University Shanghai 201804 China

ISBN: (纸本)9781849195386

Purpose: The analysis of syndrome distribution and the association between symptom((signs))-syndrome in chronic gastritis (CG) patients can provide references for research about Traditional Chinese Medicine (TCM) diagnosis and treatment of CG. Method: This paper applies the investigation method of clinical epidemiology, adopts probability statistics method and comes up with the concept of associated density to conduct association analysis of symptom-syndrome. Result: In the distribution of syndromes patients who have a single syndrome occupy 64.7% of the whole sample;some symptoms have been selected out, of which the associated density is more than 0.6. Conclusion: Through this comparison of the values, we found the obvious one-way relationship of the symptoms (signs) and syndromes, and the results are in line with traditional Chinese medicine theory. This method effectively complements and supports traditional Chinese medicine point of view and hypothesis.

关键词： Diagnosis

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Non-linear characteristics analysis of bending-torsion coupling vibration for double-shaft rotor system

Non-linear characteristics analysis of bending-torsion coupl...

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第四届国际自动化测试与仪器仪表学术会议

作者： Ma Chao Ren Wei Wang Shaohong Kong Dechao Xu Xiaoli Key Laboratory for Modern Measurement and Control Technology(Ministry of Education) Beijing Information Science & Technology University Beijing Key Laboratory for Measurement and Control on Electromechanical System Beijing Information Science & Technology University

Based on double-shaft rotor system,the study on non-linear characteristics analysis of bending-torsion coupling vibration is *** to the system characteristics,the non-linear dynamics model is set up,in which the factors such as the brace stiffness,the bending-torsion coupling vibration are ***,the response to dynamic unbalance parameters in certain scales is obtained and further analysis on relationship among the non-linear characteristics,the system input rational speed and the system national characteristics is *** results could be used to fault diagnosis and failure prediction and also would be better for further comprehensive understanding of the double-shaft rotor system vibration.

关键词： double-shaft rotor system bending-torsion coupling vibration non-linear

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Fairness-guaranteed pricing and power allocation with a friendly jammer against eavesdropping

Fairness-guaranteed pricing and power allocation with a frie...

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International Conference on Wireless Communications and Signal processing (WCSP)

作者： Jianting Yue Bo Yang Xinping Guan Department of Electronic Engineering Key Laboratory of System Control and Information Processing Ministry of Education Shanghai Jiaotong University Shanghai China Department of Automation Key Laboratory of System Control and Information Processing Ministry of Education Shanghai Jiaotong University Shanghai China

In wireless communication, jamming is a promising solution to provide improvement in secrecy rate, especially when security requirement is difficult to satisfy in realistic environment. Users could pay the friendly jammer for some interference to the eavesdropper and consequently improve the secrecy rate of their own, while the jammer wants to get maximum revenue within its capability. Thereby a Stackelberg game is introduced. Fairness also deserves particular attention, as unfair allocation of the limited resource deteriorates the performance of whole network. In this paper, we discuss a network with one jammer and several users, where they participate in the game and reach equilibrium ultimately. We utilize Kalai-Smorodinsky bargaining solution to guarantee fairness among users, making them balance their utility so as to make the best of the interference from the jammer. Moreover, we propose implementation of algorithm and demonstrate the performance.

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Analysis of traffic accident temporal and spatial impact based on shockwave theory

Analysis of traffic accident temporal and spatial impact bas...

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12th COTA International Conference of Transportation Professionals: Multimodal Transportation systems - Convenient, Safe, Cost-Effective, Efficient, CICTP 2012

作者： Yu, Guizhen Liu, Yumin Wang, Yunpeng Zhu, Xiaoguang Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China AnHui Province Key Laboratory of Intelligent Transportation System Anhui Keli Information Industry Co. LTD Anhui 230088. China

ISBN: (纸本)9780784412442

The study on the traffic impact of highway accident plays an important role in highway incident management. The paper aims to analyze the accumulation and dissipation process of an accident upstream on a two-lane highway by applying the shockwave theory. According to the number of impacted lanes, the clear-up time, and the upstream traffic flow, a mathematical model named highway traffic accident impact model (HTAIM) is established. Comparing numerical models analysis with professional microscopic traffic simulation software under the same traffic conditions, the deviation turns out to be smaller than other previous models. The results show that the model is proper and efficient for analyzing the impact of traffic accidents on upstream flow. © 2012 American Society of Civil Engineering.

关键词： Highway accidents

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An on-board information transmission unit based on the calm

An on-board information transmission unit based on the calm

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12th COTA International Conference of Transportation Professionals: Multimodal Transportation systems - Convenient, Safe, Cost-Effective, Efficient, CICTP 2012

作者： Wang, Yunpeng Duan, Xuting Tian, Daxin Luo, Hao Lu, Guangquan Yu, Guizhen Zhu, Xiaoguang Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China AnHui Province Key Laboratory of Intelligent Transportation System Anhui Keli Information Industry Co. LTD Anhui 230088 China

ISBN: (纸本)9780784412442

This paper proposed a vehicle-to-vehicle communication unit deployment method for vehicle infrastructure integration applications. One major technical challenge addressed in this paper is to achieve short delay communications between vehicls in various road situations. On-board information transmission unit (OBITU) is regarded as the ultimate carrier of information interaction in VANETs. We present the architecture of OBITU based on the analysis of standardization developments about DSRC and several related projects worldwide. A design solution and realization methods of physical layer technology are discussed in detail. A protocol of transport layer based on non-IP method, Communications, Air-interface, Long and Medium range Fast (CALM Fast) protocol, is used. The design approach has the potential for easy deployment while supporting DSRC standards. © 2012 American Society of Civil Engineering.

关键词： Vehicle to vehicle communications

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The effect of moving objects on drivers' gaze point at unsignalized intersections with mixed traffic

The effect of moving objects on drivers' gaze point at unsig...

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12th COTA International Conference of Transportation Professionals: Multimodal Transportation systems - Convenient, Safe, Cost-Effective, Efficient, CICTP 2012

作者： Zhang, Zhe Lu, Guangquan Wang, Yunpeng Tian, Daxin Wu, Jian Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China AnHui Province Key Laboratory of Intelligent Transportation System Anhui Keli Information Industry Co. LTD Anhui 230088 China

ISBN: (纸本)9780784412442

The traffic situation at unsignalized intersections with mixed traffic is complicated. Drivers need to pay attention to information from multiple sources. Gaze points can reflect regions of interest to drivers and are the basis for analyzing drivers' behavior at unsignalized intersections with mixed traffic. The eye tracking device, Smart Eye, is used to record drivers' gaze points when vehicle across intersections. The data shows that when there are no moving objects at an intersection, drivers spend most of their time gazing on the road;when there are moving objects at intersection, their fixation time on the road reduces, and part of their fixation time is divided to moving objects;the reduction of the fixation time on road approximately equals the fixation time on moving objects. We conclude that moving objects are a key factor for drivers to pay more attention to when they move across unsignalized intersection with mixed traffic. © 2012 American Society of Civil Engineering.

关键词： Cost effectiveness

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Study on cooperative active collision avoidance algorithm based-on vanets

Study on cooperative active collision avoidance algorithm ba...

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12th COTA International Conference of Transportation Professionals: Multimodal Transportation systems - Convenient, Safe, Cost-Effective, Efficient, CICTP 2012

作者： Wang, Yunpeng Wang, Pangwei Yu, Guizhen Wang, Jiajie Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China AnHui Province Key Laboratory of Intelligent Transportation System Anhui Keli Information Industry Co. LTD Anhui 230088. China

ISBN: (纸本)9780784412442

Traditional vehicle collision avoidance relies only on braking by the following vehicle in order to avoid an accident. If the distance between the two vehicles is insufficient, a crash cannot be avoided solely by the following vehicle braking. To solve the problem, this paper presents a cooperative and active collision avoidance (CACA) algorithm based on vehicle-to-vehicle communication, which can help collision avoidance in the situation of insufficient distance between two vehicles through acceleration of the preceding vehicle and braking of the following vehicle. This paper created a longitudinal cooperative control model and analyzed cooperative control strategies under vehicle-to-vehicle communication. By simulation of the model in Matlab/Simulink, the result shows the CACA system can avoid some crashes in difficult situations. © 2012 American Society of Civil Engineering.

关键词： Collision avoidance

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