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4th International Conference on Frontiers of Manufacturing Science and Measuring Technology, ICFMM 2014

作者： Zeng, Ming Wu, Zhan Xie Meng, Qing Hao Li, Jing Hai Ma, Shu Gen Tianjin Key Laboratory of Process Measurement and Control Institute of Robotics and Autonomous Systems School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9783038351924

The wind is the main factor to influence the propagation of gas in the atmosphere. Therefore, the wind signal obtained by anemometer will provide us valuable clues for searching gas leakage sources. In this paper, the Recurrence Plot (RP) and Recurrence Quantification Analysis (RQA) are applied to analyze the influence of recurrence characteristics of the wind speed time series under the condition of the same place, the same time period and with the sampling frequency of 1hz, 2hz, 4.2hz, 5hz, 8.3hz, 12.5hz and 16.7hz respectively. Research results show that when the sampling frequency is higher than 5hz, the trends of recurrence nature of different groups are basically unchanged. However, when the sampling frequency is set below 5hz, the original trend of recurrence nature is destroyed, because the recurrence characteristic curves obtained using different sampling frequencies appear cross or overlapping phenomena. The above results indicate that the anemometer will not be able to fully capture the detailed information in wind field when its sampling frequency is lower than 5hz. The recurrence characteristics analysis of the wind speed signals provides an important basis for the optimal selection of anemometer. © (2014) Trans Tech Publications, Switzerland.

关键词： Time series

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Motion comparison method combining segmented multi-Joint line graphs with the SIFT matching technique

Motion comparison method combining segmented multi-Joint lin...

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4th International Conference on Frontiers of Manufacturing Science and Measuring Technology, ICFMM 2014

作者： Zeng, Ming Ren, Hong Lin Meng, Qing Hao Chen, Chang Wei Ma, Shu Gen Tianjin Key Laboratory of Process Measurement and Control Institute of Robotics and Autonomous Systems School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9783038351924

In this paper, an effective motion comparison method based on segmented multi-joint line graphs combined with the SIFT feature matching method is proposed. Firstly, the multi-joint 3D motion data are captured using the Kinect. Secondly, 3D motion data are normalized and distortion data are removed. Therefore, a 2D line graph can be obtained. Next, SIFT features of the 2D motion line graph are extracted. Finally, the line graphs are divided into several regions and then the comparison results can be calculated based on SIFT matching ratios between the tutor's local line graph and the trainee's local line graph. The experimental results show that the proposed method not only can easily deal with the several challenge problems in motion analysis, e.g., the problem of different rhythm of motions, the problem of a large amount of data, but also can provide detailed error correction cues. © (2014) Trans Tech Publications, Switzerland.

关键词： Motion analysis

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Biomechanical analysis of typical upper limb movements based on Kinect-LifeMOD

Biomechanical analysis of typical upper limb movements based...

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4th International Conference on Frontiers of Manufacturing Science and Measuring Technology, ICFMM 2014

作者： Zeng, Ming Chen, Chang Wei Meng, Qing Hao Ren, Hong Lin Ma, Shu Gen Tianjin Key Laboratory of Process Measurement and Control Institute of Robotics and Autonomous Systems School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9783038351924

In traditional biomechanical analysis of upper limb, the high-precision motion data and lifelike human models are needed. It is obvious that those processes are costly and time-consuming. In this paper, a novel and simple combination method based on Kinect-LifeMOD is proposed. Firstly, the Microsoft Kinect (a latest depth sensor) is used to build a cheap and precise motion capture platform. Real-time and reliable key-node rotation data of human skeletons can be acquired by this motion capture system. Next, rotation data is converted into position data as the input of the LifeMOD software which can establish mathematical model of upper limb and execute biomechanical analysis automatically. The experimental results show that the proposed method could achieve the satisfactory performance. © (2014) Trans Tech Publications, Switzerland.

关键词： Biomechanics

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Chaotic artificial bee colony approach to step planning of maintaining balance for quadruped robot

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International Journal of Intelligent Computing and Cybernetics 2014年第2期7卷 175-191页

作者： Qinan Luo Haibin Duan National Key Laboratory of Science and Technology on Aircraft Control Beihang UniversityBeijingPR China School of Automation Science and Electrical Engineering State Key Laboratory of Virtual Reality Technology and SystemsBeihang University(BUAA)BeijingChina

Purpose–Artificial bee colony(ABC)algorithm is a relatively new optimization method inspired by the herd behavior of honey bees,which shows quite *** purpose of this paper is to propose an improved ABC optimization algorithm based on chaos theory for solving the push recovery problem of a quadruped robot,which can tune the controller parameters based on its search *** simulation environment is adopted to implement the proposed scheme for the quadruped ***/methodology/approach–Maintaining balance is a rather complicated global optimum problem for a quadruped robot which is about seeking a foot contact point prevents itself from falling *** ensure the stability of the intelligent robot control system,the intelligent optimization method is *** proposed chaotic artificial bee colony(CABC)algorithm is based on basic ABC,and a chaotic mechanism is used to help the algorithm to jump out of the local optimum as well as finding the optimal *** implementation procedure of our proposed chaotic ABC approach is described in ***–The proposed CABC method is applied to a quadruped robot in ADAMS *** the CABC to implement,the quadruped robot can work smoothly under the interference.A comparison among the basic ABC and CABC is *** results verify a better trajectory tracking response can be achieved by the proposed CABC method after control parameters *** implications–The proposed CABC algorithm can be easily applied to practice and can steer the robot during walking,which will considerably increase the autonomy of the ***/value–The proposed CABC approach is interesting for the optimization of a control scheme for quadruped robot.A parameter training methodology,using the presented intelligent algorithm is proposed to increase the learning *** experimental results verify the system stabilization,favorable performance and no chattering phenomena can be

关键词： Optimal control Robotics Chaotic Step planning Artificial bee colony(ABC) Quadruped robot

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Derong Liu [People in control]

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IEEE control systems 2014年第2期34卷 26-27页

作者： Liu, Derong State Key Laboratory of Management and Control for Complex Systems Department of Electrical and Computer Engineering University of Illinois at Chicago United States Institute of Automation Chinese Academy of Sciences 95 Zhongguancun East Road Beijing100190 China

关键词： Laboratories

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Virtual instruments for humidity and temperature measurements 13

Virtual instruments for humidity and temperature measurement...

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13th International Conference on Information Technology Based Higher Education and Training, ITHET 2014

作者： Nedev, Nedyu Nenova, Zvezditza Ivanov, Stefan Dept. of Fundamentals of Electrical and Power Engineering Technical University Gabrovo Bulgaria Dept. of Automation Information and Control Systems Technical University Gabrovo Bulgaria

ISBN: (纸本)9781467367301

Virtual instrumentation is used increasingly along with traditional measurement devices. They allow measurement and control of various parameters, simulated testing of models of real processes and provide convenient user interface by giving an opportunity to build an Internet-based virtual laboratories. This paper presents the results of the development of a computer-based system for data acquisition and LabVIEW virtual instruments for measuring humidity and temperature, enabling the creation of Internet-based virtual laboratories. This virtual instrumentation makes possible both remote measurement of humidity and temperature and training outside educational laboratories. The proposed approach allows remote conducting of real experiments and makes it possible to use virtual instruments in the field of training engineering students where it is essential to have practice hours. © 2014 IEEE.

关键词： Data acquisition

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Continuous Travel Time Prediction for Transit Signal Priority Based on a Deep Network

Continuous Travel Time Prediction for Transit Signal Priorit...

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International Conference on Intelligent Transportation

作者： Xiong Gang Wenwen Kang Feiyue Wang Fenghua Zhu Yisheng Lv Xisong Dong Jukka Riekki Susanna Pirttikangas State Key Lab. of Manage. & Control for Complex Syst. Institute of Automation Chinese Academy of Sciences Beijing Beijing CN The State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China Cloud Computing Center Chinese Academy of Sciences Dongguan CHINA Faculty of Information Technology and Electrical Engineering University of Oulu Finland

It has been recognized by many researchers that accurate bus travel time prediction is critical for successful deployment of traffic signal priority (TSP) systems. Although there exist a lot of studies on travel time prediction for Advanced Traveler Information systems (ATIS), this problem for TSP purpose is a little different and the amount of literature is limited. This paper proposes a deep learning based approach for continuous travel time prediction problem. Parameters of the deep network are fine-tuned following a layer-by-layer pre-training procedure on a dataset generated by traffic simulations. Variables that may affect continuous travel time are selected carefully. Experiments are conducted to validate the performance of the proposed model. The results indicate that the proposed model produces prediction with mean absolute error less than 4 seconds, which is accurate enough for TSP operations. This paper also reveals that, except for obvious factors like speed, travel distance and traffic density, the signal time when the prediction is made is also an important factor affecting travel time.

关键词： Vehicles Predictive models Object oriented modeling Training Artificial neural networks Data models

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Optimizing safety supervisors for wind turbines using barrier certificates 19

Optimizing safety supervisors for wind turbines using barrie...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Laurijsse, M. Wisniewski, R. Weiland, S. Department of Electrical Engineering Eindhoven University of Technology Eindhoven Netherlands Section for Automation and Control Aalborg University Aalborg East9220 Denmark Control Systems Group Eindhoven University of Technology Eindhoven Netherlands

ISBN: (纸本)9783902823625

To avoid structural damage, a wind turbine is equipped with a safety supervisor that triggers an emergency shutdown procedure in case of internal faults or large wind gusts. This paper leverages the (compositional) barrier certificate framework for the design and optimization of such a supervisor. The problem is formulated as a sum of squares problem and is solved using semi-definite programming. Both a direct and compositional approach are successfully implemented and verified for the NREL 5MW reference turbine. In conclusion, the methods derived in this paper are indeed viable for the syntheses and optimization of safety systems for future wind turbines. © IFAC.

关键词： Wind turbines

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Circular genetic operators based RNA genetic algorithm for modeling proton exchange membrane fuel cells

Circular genetic operators based RNA genetic algorithm for m...

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作者： Zhu, Qinqin Wang, Ning Zhang, Li National Laboratory of Industrial Control Technology Institute of Cyber-systems and Control Zhejiang University Hangzhou310027 China College of Automation and Electrical Engineering Zhejiang University of Science and Technology Hangzhou310023 China

Inspired by the biological RNA, a circular genetic operators based RNA genetic algorithm (cRNA-GA) is proposed to estimate the model parameters of the proton exchange membrane fuel cell (PEMFC). To maintain the population diversity and avoid premature convergence, we design the novel genetic operator of the double-loop crossover operator. To allow the algorithm to jump out of local optima, the adaptive mutation probabilities are presented and the stem-loop mutation operator is adopted with the other mutation operators. The simulated annealing method is also incorporated into the cRNA-GA to improve local search ability. Performance tests conducted on some typical benchmark functions have witnessed the validity of cRNA-GA. The cRNA-GA is also applied to estimate the parameters of the PEMFC model and the satisfactory results have shown its effectiveness. © 2014 Hydrogen Energy Publications, LLC.

关键词： RNA

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Attitude synchronization for multiple flexible spacecraft based on non-smooth control 19

Attitude synchronization for multiple flexible spacecraft ba...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Du, Haibo He, Yigang Li, Shihua Cheng, Yingying Chen, Xisong School of Electrical Engineering and Automation Hefei University of Technology Hefei230009 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing210096 China

ISBN: (纸本)9783902823625

This paper considers the problem of attitude synchronization for a group of flexible spacecraft based on distributed attitude cooperative control strategy. Based on the backstepping design, non-smooth control, and the neighbor-based design rule, a distributed attitude control law is constructed step by step. Under the proposed control law, it is shown that the attitude synchronization is achieved asymptotically and the induced vibration by flexible appendages is simultaneously suppressed. © IFAC.

关键词： control theory

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