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AIAA AVIATION 2014 -15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference 2014

作者： Guo, Xiaosong Long, Teng Wu, Di Wang, Zhu Liu, Li Wang, Hui School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of Education Beijing Institute of Technology Beijing Beijing 100081 China Aerospace Communication Holding CO. LTD Hangzhou 310009 China

ISBN: (纸本)9781624102837

To enhance the efficiency of modern engineering optimization problems involving computationally intensive analysis models, a new radial basis function (RBF) metamodel based global optimization method using particle swarm evolution and fuzzy c-means clustering, notated as PSFC-RBF, is presented. In PSFC-RBF, particle swarm evolution is used to generate a large amount of inexpensive samples, and then fuzzy c-means clustering is used to cluster the cheap samples for identifying the interesting space. Sequential expensive samples are produced to update RBF metamodel and lead the optimization process converge to the global optimum in an efficiency manner. PSFC-RBF is validated by using several numerical benchmark problems and an engineering problem. In terms of the comparison results with some other metamodel-based optimization methods, PSFC-RBF shows satisfactory performance in both optimization efficiency and global convergence capability. Moreover, the good robustness of PSFC-RBF is also demonstrated.

关键词： Efficiency

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Constructing reliability analysis model of complex systems based on FMEA-FTA-BN

Constructing reliability analysis model of complex systems b...

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作者： Ma, De Zhong Ding, Wen Fei Jiang, Yong Qing Zhou, Zhen College of Measurement-control Technology and Communications Engineering Harbin University of Science and Technology Harbin China The Higher Edu. Key Lab. for Measuring and Ctrl. Tech. and Instrumentations of Heilongjiang Province Harbin China Electronic Information Engineering Institute Harbin Huade University Harbin China

ISBN: (纸本)9783038351221

In order to solve the difficulties existing in course of complex system reliability modeling, a novel method was proposed in this paper. According to the analysis sequence, from FMEA to FTA to BN, a BN can be constructed by making full use of the helpful information in the results of FMEA and FTA. The reliability of complex system can be analyzed based on uncertainty-expression ability and bidirectional-reasoning ability of BN. For demonstrating the effectiveness of this method, aim at the failures of gears in wind turbine gearbox, a BN for system reliability analysis was constructed. © (2014) Trans Tech Publications, Switzerland.

关键词： Fault tree analysis

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Application of noise reduction method based on Birgé-Massart threshold

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2014年第12 SUPPL.期34卷 134-137页

作者： Xu, Xiaoli Jiang, Zhanglei Zuo, Yunbo Wu, Guoxin School of Mechanical and Vehicle Engineering Beijing Institute of Technology Beijing 100081 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing 100192 China

Flue gas generator set is a kind of large high-speed rotating machinery in petrochemical industry. This research focuses on noise reduction algorithms basis on the Birgé-Massartthreshold. Obtained the threshold through Penalization Strategy Provided by Birgé-Massart;constructed different modulus maximum vertex neighborhood on different wavelet transform decomposition scales to influence the search process of modulus maximum point;obtained the appropriate modulus maximum points sequence on various wavelet decomposition scales;highlighted state feature information;finally usedMallat staggered projection to reconstruct signals. In order to validate the effectiveness of the algorithm, it was compared with four kinds of threshold noise suppression methods namely Rigrsure, Sqtwolog, Heursure, Minimaxi. The results show that this algorithm has a better signal to noise ratio and mean-square error.

关键词： Gas generators

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Research of the Influence of Rectangular Prism Pien Error on Angle measurement for Photoelectric Autocollimator

Research of the Influence of Rectangular Prism Pien Error on...

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International Conference on Instrumentation, measurement, Computer, communication and control (IMCCC)

作者： Tao Hu Dandan Wang Zhigang Li Department of Automatic Measurement and Control Harbin Institute of Technology Harbin China Beijing Institute of Astronautical Systems Engineering Beijing China

ISBN: (纸本)9781479965762

Photoelectric autocollimator is a kind of small angle measuring instrument of high accuracy. For the increasing demand of the measurement accuracy, each link to affect the precision of photoelectric autocollimator needs to be analyzed and derived. In view of the analysis of the lack for the right angle prism pien errors which effect on the measurement precision, this paper adopts the method of vector analysis and coordinate transformation, to solve the relationship between the image type photoelectric autocollimator reticules imaging and prism space angle. On this basis, analyze the influence of the right angle prism error on the measurement. To verify the correctness of test derivation, using a type of photoelectric autocollimator and right angle prisms for experiments, the test results coincide with the conclusion of theoretical derivation.

关键词： Vectors Extraterrestrial measurements measurement uncertainty Lenses Optical variables measurement Coordinate measuring machines Adaptive optics

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Research of Short Distance Wireless communication technology in the Mine Underground

Research of Short Distance Wireless Communication Technology...

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International Conference on Instrumentation, measurement, Computer, communication and control (IMCCC)

作者： Yuping Zhang Yinghui Zhang Chen Li School of Measurement and Control Technology and Communications Engineering Harbin University of Science and Technology Harbin China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

ISBN: (纸本)9781479965762

According to the present situation of the wireless communication technology in the mine underground, the article makes a compare and analysis of the present of widely use of IrDA, RFID, Bluetooth, UWB and ZigBee etc. Short distance wireless communication, and designs the mine underground personnel positioning system using RFID technology based on the research of transmission characteristics of radio in the mine underground. It provides a feasible scheme for wireless communication technology in the mine underground. The experiment results show that if RF rate is set at 250Kbps, when people move, the network connection to the underground modulation assistant personnel carry identification cards, and the uplink and downlink can be observed in the computer, it can operate normally required in the design environment.

关键词： Wireless communication Radiofrequency identification Personnel Radio frequency Zigbee Wireless sensor networks Bluetooth

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Group establishing algorithm for strategic mobile scenario in manets

Group establishing algorithm for strategic mobile scenario i...

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2014 International Conference on Information and communications Technologies, ICT 2014

作者： Xiaofeng, Xu Xiao, Wang Science and Technology on Communication Information Security Control Laboratory China Electronic Group Corporation No. 36 Institute Zhejiang Jinxing China School of Instrument Science and Opto-electronics Engineering Beijing University of Aeronautics and Astronautics Beijing China

ISBN: (纸本)9781849198431

Wireless communication network has such features as limited bandwidth, changeful channel and dynamic topology, etc. In MANETS, the performance is significantly degraded as the scale of the network grows, which has lots of difficulties in accessing control, bandwidth distribution, resource assign and congestion control. Therefore, in this paper, we have proposed an online self-organized group establishing mechanism for strategic mobile scenarios of MANETs to realize the maneuverability of putting the secure group operations into effect. First of all, the algorithm performs initialization for each node, and then the nodes determine group-manager based on condition function and invite neighboring nodes to join in, finally, the rest nodes without grouping confirm their own groups by the group condition function. Both theoretical analysis and simulation experiments have demonstrated that our method can meet the scalability requirement which plays an important role in prolonging the network lifetime and effectively saving the communication, computation and storage overhead in strategic mobile scenario of MANETs.

关键词： Bandwidth

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Group establishing algorithm for strategic mobile scenario in manets

Group establishing algorithm for strategic mobile scenario i...

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2014 International Conference on Information and communications Technologies, ICT 2014

作者： Xu, Xiaofeng Wang, Xiao Science and Technology on Communication Information Security Control Laboratory China Electronic Group Corporation No. 36 Institute Zhejiang Jinxing China School of Instrument Science and Opto-Electronics Engineering Beijing University of Aeronautics and Astronautics Beijing China

ISBN: (纸本)9781849198431

关键词： Bandwidth

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Fault diagnosis and early warning of motorized spindle system

Fault diagnosis and early warning of motorized spindle syste...

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第五届国际自动化测试与仪器仪表学术会议

作者： Xu Xiaoli Meng Lingxia Key Laboratory of Modern Measurement & Control Technology(Ministry of Education) Beijing Information Science & Technology University School of Mechanical Engineering Beijing Institute of Technology

Motorized spindle system is the key functional part of the high speed CNC machine and it directly affect the accuracy and reliability of the whole machine.A dynamic model of motorized spindle system has been built By analyzing the motorized spindle *** to the model,the paper studies the mechanisms of motorized spindle common faults,such as unbalance,impact-rub,bearing failure,and support looseness,and offers the general methods and procedures for the fault diagnosis of high-grade motorized spindle *** addition,a intelligent multi-information fusion condition monitoring and fault diagnosis platform of CNC motorized spindle system was *** diagnosis was made in motorized spindle system with a eccentric *** study can greatly improve the level of machine tool production and serve as key technique for rotary machine such as NC machine and wind generating sets.

关键词： Fault Diagnosis Fault Mechanism Numerical control Machine Motorized Spindle System

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Fault diagnosis of wind power equipment of manifold diagram of axis orbit diagram based on ALTSA

Fault diagnosis of wind power equipment of manifold diagram ...

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第五届国际自动化测试与仪器仪表学术会议

作者： Meng Lingxia Xu Xiaoli Key Laboratory of Modern Measurement & Control Technology(Ministry of Education) Beijing Information Science & Technology University School of Mechanical Engineering Beijing Institute of Technology

Wind power rotary machines usually work in complex conditions,and fault development trend information is easy to be overwhelmed by load changes,noise and other non-fault information and easy to cause ***,it's necessary to research the feature extraction method of manifold diagram of three-dimensional(3D) axis orbit diagram to realize the weak fault information acquisition of graphic form on varying working condition for rotary *** field data collection and processing on wind generating sets,it can efficiently inhibit the wind regime and noise *** research results can provide a new approach for extraction of mechanical fault features to improving the accuracy and effectiveness of fault trends prediction of rotary machines on complex conditions.

关键词： axis orbit diagram manifold learning varying working condition

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Analysis, filtering, and control for takagi-sugeno fuzzy models in networked systems

Abstract and Applied Analysis

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Abstract and Applied Analysis 2015年第1期2015卷

作者： Zhang, Sunjie Wang, Zidong Hu, Jun Liang, Jinling Alsaadi, Fuad E. School of Information Science and Technology Donghua University Shanghai 200051 China Department of Computer Science Brunel University Uxbridge Middlesex UB8 3PH United Kingdom Communication Systems and Networks (CSN) Research Group Faculty of Engineering King Abdulaziz University Jeddah 21589 Saudi Arabia Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 China Department of Applied Mathematics Harbin University of Science and Technology Harbin 150080 China Department of Mathematics Southeast University Nanjing 210096 China

The fuzzy logic theory has been proven to be effective in dealing with various nonlinear systems and has a great success in industry applications. Among different kinds of models for fuzzy systems, the so-called Takagi-Sugeno (T-S) fuzzy model has been quite popular due to its convenient and simple dynamic structure as well as its capability of approximating any smooth nonlinear function to any specified accuracy within any compact set. In terms of such a model, the performance analysis and the design of controllers and filters play important roles in the research of fuzzy systems. In this paper, we aim to survey some recent advances on the T-S fuzzy control and filtering problems with various network-induced phenomena. The network-induced phenomena under consideration mainly include communication delays, packet dropouts, signal quantization, and randomly occurring uncertainties (ROUs). With such network-induced phenomena, the developments on T-S fuzzy control and filtering issues are reviewed in detail. In addition, some latest results on this topic are highlighted. In the end, conclusions are drawn and some possible future research directions are pointed out. © 2015 Sunjie Zhang et al.

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