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2010 Chinese Control and Decision Conference

作者： Mingjian Zhang school of automation,Guangdong University of Technology,Guangzhou,510006

In this paper,we consider the problem of blind identification in the underdetermined instantaneous mixtures case,where there are more sources than ***,a simultaneous matrix diagonalization(SMD)-based method has been proposed without any need of sparsity assumption on *** of using SMD technique,we propose a fixed point algorithm,which estimates the columns of the mixing matrix sequentially one by *** simulations are presented in order to demonstrate that the proposed algorithm has the ability to identify the mixing matrix,and its performance is comparable to that of SMD-based algorithm.

关键词： Blind identification fixed point algorithm underdetermined mixtures parallel factor(PARAFAC) analysis simultaneous matrix diagonalization(SMD)

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Recognition of Cyclostationary Signals Smoothed

Recognition of Cyclostationary Signals Smoothed

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2012 National Conference on Information Technology and Computer Science

作者： Gaohui Liu The school of automation and information Xi''an university of technology Xi''an,China Zhiping Zhang The school of automation and information Xi''an university of technology Xi''an,China Yuan Yang The school of automation and information Xi''an university of technology Xi''an,China

In the identification process of modulated signal based cyclic spectrum,it is chief to be synchronized for the received *** article focuses on the reception signal which is not *** uniform distribution variable delay exists,it will not have cyclostationary,namely it is converted into a stable signal,which limits the usable range of cyclic spectrum identifying ***,in this situation,through extracting characteristic parameters,simulation shows that the method is perfect for modulation identification under the condition that SNR is 0-50dB.

关键词： cyclostationarity uniform distribution modulated signal recognition

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Static Properties Model of Magnetically Controlled Shape Memory Alloy Based on Neural Networks

Static Properties Model of Magnetically Controlled Shape Mem...

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2009中国控制与决策会议

作者： Qingxin Zhang school of automation Shenyang Institute of Aeronautical Engineering Shenyang 110136,China Ming Yang school of automation Shenyang Institute of Aeronautical Engineering Shenyang 110136,China. Jing Zhang school of automation Shenyang Institute of Aeronautical Engineering Shenyang 110136,China Xiaoyan Qiu school of automation Shenyang Institute of Aeronautical Engineering Shenyang 110136,China,

Based on the experimental data obtained from static properties test of magnetically controlled shape memory alloy,using the function of approximation of BP neural networks,the forecasting modelling was *** experimental data and the forecasting data agreed well and the error was only 0.04%,which indicates that the modelling had good *** neural networks modelling can avoid the problem to calculate the modelling parameters based on the material physical properties and solve the material inherent coupling problem between magnetic field,the force fields and temperature *** provided a new method to research the properties of magnetically controlled shape memory alloy.

关键词： Index Terms-Magnetically Controlled Shape Memory Alloy Static Characteristics BP Neural Network Coupling

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STUDY ON DIRECT TORQUE CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR BASED ON OBSERVING STATOR FLUX LINKAGE

STUDY ON DIRECT TORQUE CONTROL OF PERMANENT MAGNET SYNCHRONO...

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International Technology and Innovation Conference 2006

作者： LIN Weijie school of automation, Hangzhou Dianzi University, Hangzhou 310018, China

＜正＞A direct torque control （DTC） strategy based on observing stator flux linkage for permanent magnet synchronous motor （PMSM） was investigated. Traditional DTC can adjust the torque and flux linkage just with only 8 basic voltage space vectors. It has rapid dynamic response, but, it also has the shortcomings: ripple of torque and current, variable switching frequency, and poor performance while low speed. Therefore, a PI controller was used instead of the hysteresis controller and switching table in traditional DTC. The voltage space vector prognosticated by the error of torque for compensating the error of flux linkage is deduced. With space vector modulation （SVM）, the error between the estimated and the referenced of stator flux linkage and torque will be accurately compensated by the synthesized voltage space vector. The simulations and experiments verified that compared to DTC of PMSM, DTC-SVM is capable of keeping the excellent dynamic response, also evidently reducing the torque ripple and effectively improving the steady state performance.

关键词： Direct torque control space vector modulation simulation experiment

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Construction Environment of Personal Handy Phone System and It’s Management

Construction Environment of Personal Handy Phone System and ...

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IEEE 2005 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications

作者： Cui Xiaoyan school of automation, Beijing University of Posts and Telecommunications, 100876 China

Personal handy phone system is a populartelecommunication system to citizens. However, with theawakening of citizens’ environmental sense, theelectromagnetic radiation problem caused by the basestatio

关键词： personal handy phone, electromagneticradiation, environmental management

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Number of Switchings and Design of Switching Sequences for Controllability of Switched Linear Systems

Number of Switchings and Design of Switching Sequences for C...

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第25届中国控制会议

作者： Ji Zhijian school of automation Engineering, Qingdao University, Qingdao, Shandong 266071

＜正＞This paper investigates the number of switchings and design of switching sequences for controllability of switched linear systems. Two related results are put forward. One is a new constructive approach for design of switching sequences. The controllable state set of each switching sequence designed via the approach coincides with the controllable subspace of switched linear systems. The other is a well estimated value for the minimum number of switchings required for controllability, each state in the controllable subspace can be steered to origin within this value of switching times.

关键词： Switched systems Switching sequence Controllability Reachability

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Symmetric Structure of Induction Motor Systems

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Advances in Manufacturing 1999年第4期3卷 304-307页

作者： KANG Hui jun CHEN Bo shi WANG Feng yao (school of automation, Shanghai University) school of automation Shanghai University

In this paper, symmetric structure of induction motor system in stationary αβ 0 coordinates is studied by the geometric approach. The results show that the system possesses symmetry ( G,θ,Φ ) and infinitesimal symmetry. Under certain conditions, the system can be transformed into a form possessing state space symmetry ( G,Φ ) and infinitesimal state space symmetry by means of state feedback and input coordinate base transform. The results can be extended to the fifth order induction motor system fed by hysteresis band current controlled PWM inverter.

关键词： induction motor nonlinear system fiber bundle symmetry structure decomposition

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Design of the Test Platform of Servo System

Design of the Test Platform of Servo System

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Mechanical Engineering and Material Science—2012 International Conference on Mechanical Engineering and Material Science(MEMS 2012)

作者： Yong-guang Liu school of automation science and electric engineering Beihang University Beijng China Qin Lei school of automation science and electric engineering Beihang University Beijng China

This paper designs a test platform of servo *** technique method of the test platform of servo system is studied,the structure diagram of the test platform of servo system is given;the way of loading friction resistance torque and moment of inertia respectively are designed,which realizes changing the friction resistance and moment inertia of the system;the real-time measurement and control system based on the Lab Windows/CVI and RTX is designed,which realizes the real-time control;the test platform can truly simulate the actual load of the servo system,assess dynamic and static technology index of the servo system.

关键词： servo system friction resistance torque load moment of inertia load real-time control

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Some notes on betting commitment distance in evidence theory

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Science China(Information Sciences) 2012年第3期55卷 558-565页

作者： HAN DeQiang1 , DENG Yong2, HAN ChongZhao1 & YANG Yi3 1MOE KLINNS Lab, SKLMSE Lab, Institute of Integrated automation, school of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China 2school of Electronics and Information Technology, Shanghai Jiaotong University, Shanghai 200240, China 3school of Aerospace, Xi’an Jiaotong University, Xi’an 710049, China MOE KLINNS Lab SKLMSE Lab Institute of Integrated Automation School of Electronics and Information Engineering Xi’an Jiaotong University Xi’an China school of Electronics and Information Technology Shanghai Jiaotong University Shanghai China school of Aerospace Xi’an Jiaotong University Xi’an China

The distance of evidence, which represents the degree of dissimilarity between bodies of evidence, has attracted more and more interest and has found extensive uses in many realms. In this paper some notes on a widely used distance of evidence, i.e., betting commitment distance, are provided, including the arguments on the rationality of its definition, some misuses and some counter-intuitive behaviors of betting commitment distance. Several numerical examples are also provided to support and verify our arguments.

关键词： pignistic probability evidence theory betting commitment distance distance of evidence

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Value reduction in rough sets based on Apriori algorithm

Value reduction in rough sets based on Apriori algorithm

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2010 Chinese Control and Decision Conference

作者： Yuliang Ma,Zhizeng Luo school of automation,Hangzhou Dianzi University,Hangzhou,310018

Aiming at value reduction,a kind of RSVR algorithm was presented based on support in association rules via Apriori algorithm.A more effective reduction table can be obtained by deleting those rules with less support according to least support—*** reduction feasibility of this algorithm was achieved by reducing the given decision table. Testing by UCI machine learning database and comparing this algorithm with least value reduction algorithm indicate the validity of RSVR algorithm.

关键词： Association rules Value reduction Support Apriori algorithm Rough sets

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