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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Changfei Guo Xiaoping Zou Xin Zhai Rongrong Zhang Beijing Key Laboratory for Sensor Ministry of Education Key Laboratory for Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781612846842

Based on the reviewing of the wireless sensor network (WSN) research and application, the disadvantages of the traditional cable sensing data acquisition system are pointed out, and a new energy-saving, cheap and wide application scope system by Wireless RF way is proposed. This paper gives out a method of wireless sensor data acquisition system based on nRF905, including the design of structure, hardware and software. The system is efficiency, environmental friendly and can be remotely controlled.

关键词： Wireless sensor networks Wireless communication Data acquisition Hardware Relays Radio frequency Monitoring

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Study of CNC machine working condition monitoring and fault prediction system based on PHP

Study of CNC machine working condition monitoring and fault ...

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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： Wang Hongjun Xu Xiaoli Wan Peng Key Laboratory of Modern Measurement & Control Technology Ministry of Education School of Mechanic and Electric Engineering BISTU

The recent progresses in mechanical system condition monitoring technology based on the inter-net was reviewed and *** CNC machine tools working condition plays an important role for the flow shop production line for the products quality,production efficiency and production *** framework of the production line CNC machine tools working condition monitoring and fault prediction system（E-MAX System） is *** functions of the system,are discussed in *** least-square method could be employed to collect and analyze the malfunction of the CNC machine tools to obtain the MTBF of key equipments and providing technical support for the maintenance based on practice data from the *** machine tools working condition monitoring and fault forecasting System（E-MAX） was designed and developed based on the platform of Apache,PHP and *** system has several significant functions,including information consultation,working condition monitoring and fault prediction,maintenance plan and *** system is a feasible tool for enterprises in terms of information management of the production line and equipment maintenance based on the conditions of the equipment.

关键词： CNC machine tools working condition and fault forecasting system B/S structure Apache+PHP+MySQL

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Rotating machinery fault prediction based on manifold learning method

Rotating machinery fault prediction based on manifold learni...

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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： Wan Peng Wang Hongjun Ma Chao Key Laboratory of Modern Measurement & Control Technology Ministry of Education School of Mechanic and Electric Engineering BISTU

In order to extract the nonlinear characteristic of rotary machine,a new monitoring method based on manifold learning method is *** dimension space of original signals is constructed by multivariate statistical *** methods included local target space alignment(LTSA),Isometric Mapping(ISOMAP) and locally linear embedding(LLE) are employed for extracting one dimension principal manifold to reflect the non-linear dynamic characteristics of the *** the results show that LTSA can predict the fault directly and effectively with practical data.

关键词： rotary machine fault Prediction manifold learning method

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Constructing high-end CNC fault knowledge base based on wavelet packet and rough sets

Constructing high-end CNC fault knowledge base based on wave...

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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： Xu Xiaoli Ren Bin School of Mechanical Engineering Beijing Institute of Technology Key Laboratory of Measurement &Control Beijing Information Science & Technology University

High-end CNC is one of the main production equipment in the modern manufacturing *** order to guarantee effectively the reliable、 stable and safe operation,the test study is conducted to the knowledge base about fault diagnosis on high-end *** this paper,the study of typical functional components on high-end turning center are focused;builds the condition monitoring test platform with the typical functional components as the core;the fault knowledge base model is presented;the theory of wavelet packet is used to extract fault energy feature;the technology of knowledge acquisition based on rough sets theory is *** research suggests that CNC fault rules can be acquired effectively through combining with wavelet pocket and rough sets,and improves the fault diagnosis rate,and provides reliable data to CNC fault *** the production of machine tools can provide a key technology for obtaining fast and accurate fault diagnosis results.

关键词： High-end CNC wavelet packet rough sets fault knowledge base

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New approaches to relaxed stabilization conditions and H-infinity control designs for T-S fuzzy systems

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控制理论与应用（英文版） 2012年第1期10卷 82-91页

作者： Juntao PAN Shumin FEI Yudong NI Mingxiang XUE Key Laboratory of Measurement and Control of Complex Systems of Engineering （Ministry of Education） Southeast University Nanjing Jiangsu 210096 China LAMIH UMR CNRS8503 University of Valenciennes et Hainaut-Cambr6sis Le Mont Houy 59313 Valenciennes Cedex 9 France School of Science Hefei University of Technology Hefei Anhui 230009 China

This paper focuses on the problem of fuzzy control for a class of continuous-time T-S fuzzy systems. New methods of stabilization design and H-infinity control are derived based on a relaxed approach in which both fuzzy Lyapunov functions and staircase membership functions are used. Through the staircase membership functions approx- imating the continuous membership functions of the given fuzzy model, the membership functions can be brought into the design conditions of fuzzy systems, thereby significantly reducing the conservativeness in the recent fuzzy controller design methods. Unlike some previous fuzzy Lyapunov function approaches reported in the literatures, the proposed design techniques of stabilization and H-infinity control do not depend on the time-derivative of the membership functions that may be pointed out as the main source of conservatism when considering fuzzy Lyapunov functions analysis. Moreover, conditions for the solvability of the controller design given here are written in the form of linear matrix inequalities, but not bilinear matrix inequalities, which are easier to be solved by convex optimization techniques. Simulation examples are given to demonstrate the validity and applicability of the proposed approaches.

关键词： T-S fuzzy systems Fuzzy Lyapunov functions Staircase membership functions Linear matrix inequalities

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DESIGN OF HOUSEHOLD APPLIANCE control SYSTEM BASED ON ZIGBEE

DESIGN OF HOUSEHOLD APPLIANCE CONTROL SYSTEM BASED ON ZIGBEE

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2012 IEEE 2nd International Conference on Cloud Computing and Intelligence Systems

作者： Xiangnan Peng Xiaoping Zou Zhaoxian Yu Yuan Yang Research Center for Sensor Technology Beijing Key Laboratory for sensorMinistry-of-Education Key Laboratory for Modern Measurement and Control TechnologySchool of Applied SciencesBeijing information Science and Technology University

According to Zigbee wireless communication technology with the characteristics of low cost, low power, low-complexity and short-distance, we designed a wireless home remote control system. Its design is based on microcontroller chip CC2430 from TI company and IAR software platform. This paper introduces the system hardware circuit design and the core software algorithm in detail. The test finally shows the system can achieve the wireless remote control in household equipments - lights, doorbell, air conditioning, etc. Some other potential application areas and its direction of development in future are given at last.

关键词： Zigbee Wireless communication CC2430 Remote control switch

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Complex curve surfaces 3D measuring device based on gray code value stereo matching

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Journal of Convergence Information technology 2012年第4期7卷 205-214页

作者： Wang, Yang Pengyu, Tao Yu, Shuang Wu, Liwei Wang, Lijuan College of Measurement-Control and Communication Engineering Harbin University of Science and Technology Harbin China The higher educational key laboratory Measuring and Control Technology and Instrumentations of Heilongjiang province Harbin University of Science and Technology Harbin China

Three-Dimensional (3D) surface measuring, as an important procedure of reverse engineering, is being causing concerns interests by more and more researcher. In this paper, a 3D measuring device for complex curve surfaces based on Gray coded Structured Light (SL) and stereo vision was designed. The measuring model was built based on the measuring principle. And the Gray decoding value of each sample point is the stereo matching element. After errors analyzing, the error of image coordinate extracting is determined as the largest error source for measuring result. The results of experiments show that this design is feasible, and the acquirement of the 3D data of complex curve surfaces is achieved. The reconstruct surface is similar in the visual effects, and the reconstruction surface could be display smoothly and detail.

关键词： Stereo vision

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Study on modeling and stability analysis of nonlinear transmission system of wind turbine generator system

Study on modeling and stability analysis of nonlinear transm...

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第23届过程控制会议

作者： Meng Zong Fu Liyuan Song Minghou Key Laboratory of Measurement Technology and Instrumentation of Hebei Province Yanshan University Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University Qin

The nonlinear dynamical model of wind turbine generator drive system is presented considering nonlinear stiffness of the drive system. The frequency characteristics of wind turbine drive system incented by different forms, such as phase plane and Poincaré section are studied by simulation. The stability of wind turbine generator drive system is analyzed by using bifurcation and chaos theories. The stability of the periodic motion and the process of period-doubling bifurcation into chaos are further studied, and the effect of nonlinear stiffness on stability of wind turbine generator drive system is showed. The results show that negative nonlinear stiffness is beneficial to keep the stability of system, and when the chaos appears on the system, incentive parameter increases as the negative nonlinear stiffness increases.

关键词： Wind turbine generator system Drive system Dynamical model Nonlinear stiffness Bifurcation and chaos

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Research on multi-attribute comprehensive evaluation method for instrument integration development

Research on multi-attribute comprehensive evaluation method ...

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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： Shi Yanpeng Wu Guoxin Zhu Chunmei Liaoning Provincial College of Communication Key Laboratory of Modern Measurement & Control Technology(Ministry of Education) Beijing Information Science &Technology University

A typical optical-mechanical integration instrument system integrity development based on multi-attribute comprehensive evaluation method is proposed in this *** multi-attribute comprehensive evaluation process is stipulated and the new evaluation system for optical-mechanical-electrical instrument is *** evaluation system includes numerous secondary indices based on seven primary evaluation *** realizes the comprehensive evaluation for the new system quality by index model which is made according to the multiple attribute features of the integrity development *** method can not only inspect the product quality,but also can rapidly and effectively perform a comprehensive evaluation for the instrument integrity development capacity and effect.

关键词： instrument integration development multi-attribute synthetic evaluation method thermal analyzer

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A tool wearing assessment method based on wavelet transform

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2nd World Congress on Computer Science and Information Engineering, CSIE 2011

作者： Dou, Yantao Xu, Xiaoli Wu, Guoxin Wang, Shaohong Ren, Bin Institute of Machinery and Vehicles Beijing Institute of Technology Beijing China Beijing Key Laboratory: Measurement and Control of Mechanical and Electrical System Beijing University Beijing China 19# Qingyuan North Road Huangcun town Daxing District Beijing 102617 China

ISBN: (纸本)9783642257773

In this paper, a tool wear assessment method based on wavelet packet energy spectrum and energy value of the characteristic spectrum band is introduced. The experiment to different wear condition of the turning tool were completed. The typical time and frequency feature of acoustic emission signals was collected. By wavelet packet analysis, the energy spectrum coefficient of wavelet packet were extracted, which can be used to describe the energy distribution in different frequency band. And then the characteristic spectrum band which is sensitive to the tool wearing can be found, and the relationship between the energy value of the characteristic spectrum band and the degree of tool wear is established. The result shows that distribution of the energy spectrum coefficient of wavelet packet changed significantly after the tool worn, and the energy value of the characteristic spectrum band increased with the tool wear. Therefore, the characteristic index can accurately describe the extent of tool wear. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Wavelet transforms

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