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DSP-Based Indirect Rotor Field Oriented Control for 15-Phase Induction Machines

DSP-Based Indirect Rotor Field Oriented Control for 15-Phase...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Lijun Hou Yanmin Su Lin Chen School of Electrical Engineering Xi'An Jiao Tong University Xi 'An 710049 CHINA School of Mechanical Engineering Hua Zhong University of Science and Technology Wuhan 430074 CHINA

This paper presents the mathematical model ofmultiphasc induction machines in synchronous refcrcnce frameby using generalized two-phase real transtormation. Indirectrotor field oriented control (IRFOC) is then developed formultiphasc induction machines. A detail implementation ofIRFOC for 15-phase induction machines and generalizedunified voltage modulation technique be applied to multiphaseinverters are described. The control method is implemented thefloating-point digital signal processor board TMS320C32 toverify the validity of the developed control strategy. Multiphase induction machines, Indirect rotor fieldoriented control. Unified voltage modulation, DSP

关键词： DSP-Based Indirect Rotor Field Oriented Control for 15-Phase Induction Machines SVPWM

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Experimental Study of Performance Monitoring for Centrifugal Fan and Fault Diagnosis for Pipe Network in Power Plant

Experimental Study of Performance Monitoring for Centrifugal...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Wang Songling Hou Junhu Yuan Xiongjun An Liansuo Liu Tongxin Department of Power Engineering, North China Electric Power University, Baoding Hebei 071003, China

In this paper, accurate fitting on performancecurves of fan by RBF networks has been performed and thenflow-monitoring model of fan is derived. The experimentalstudy on the fan of 4-73No8D is taken on the coudition of thechange of rotate speed, resistance of plpe network and angleof regulator, and then the accurate monitoring results of floware obtained. In the process of experimental study ofjam-leak trouble diagnosis for pipe network, the resistancecoefficient of pipe network and the static pressure of inletand outlet of fan are defined as the eigenvector for troublediagnosis, which act as the inputs of the neural *** jam and air leak in different position of pipe networkare simulated in laboratory, some experimental data fortraining and others for test, as a result the troubles of pipenetwork are diagnosed accurately.

关键词： flow-monitoring centrifugal fan pipe network neural network diagnosis

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A ROTATION AND SCALING INVARIANT SECOND GENERATION WATERMARKING SCHEME

A ROTATION AND SCALING INVARIANT SECOND GENERATION WATERMARK...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Zhen Ji Weiwei Xiao Jianhua Wang Jihong Zhang Faculty of Information Engineering, Shenzhen University, Shenzhen, China

In this paper, a scheme following the second generationwatermarking (2GW) paradigm is proposed. The hostimage is decomposed with the wavelet packet (WP). Thebit stream of binary watermark is coded into severalpatterns with salient feature, which is circular masking inthis paper. These patterns are embedded into waveletpacket coefficients according to human perceptualcharacteristics. For the detection of watermark, thegeometric distortion is calibrated for the contaminatedwatermarked image. A new HVS mask based on wavelettransform is proposed with consideration of local texturecharacteristics when embedding. Hough transform is usedto detect the circular features in the WP domain. Thisscheme has the following characteristics: (a) robustnessagainst the common geometric attacks (rotation, scaling,etc.) is improved significantly. (b) human perceptualcharacteristics is taken into consideration, therefore, thetradeoff between invisibility and robustness is *** of extensive experiments indicate that thisproposed scheme is significantly effective in resistingvarious attacks such as adding noise, rotation, scaling,JPEG compression, etc.

关键词： HVS A ROTATION AND SCALING INVARIANT SECOND GENERATION WATERMARKING SCHEME image

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An Improvement Method of the Speech Quality by Pitch Compensation in Transition Region in G.723.1

An Improvement Method of the Speech Quality by Pitch Compens...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： J.K.KIM M.J.BAE

G.723.1 uses pitch and gain coefficient for periodicityof speech and LSP(line spectrum pairs) coefficient for ***, this encoder processes without considering differencebetween stable and unstable speech region, especially transientregion. Therefore, it is impossible to detect exact pitch in transitionregion. So, speech degradation is produced. In this paper, we propose the new algorithm that improvesspeech quality in *** detecting exact pitch in transitionregion. First of all, we decide threshold of pitch gain coefficient instable region by using pitch gain coefficient from G.723.1. If pitch gain coefficients exceed threshold value, pitch gaincoefficient is recalculated by controlling before and after 10sample. And then pitch gain coefficient closed to the thresholdvalue is determined. After this processing, pitch and pitch gaincoefficient are coded. As a result, segSNR(segmental Signal to Noise) and MOS (MeanOpinion Score) are improved average 1.630(dB), 0.277(MOS)respectively.

关键词： G.723.1 codec speech quality distortion pitch pitch predictor

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Dynamic Modeling, Control and Simulation of Flexible Dual-Arm Space Robot

Dynamic Modeling, Control and Simulation of Flexible Dual-Ar...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Wu Licheng Sun Fuchun Sun Zengqi Su Wenjing State Key Laboratory of Intelligent Technology and Systems, Department of Computer Science and Technology, Tsinghua University,Beijing, China, 100084

Flexible Multi-Arm Space Robot is a highlynonlinear and coupled dynamic system. Using the assumedmode method to describe the elastic deformation, the dynamicmodel of flexible dual-arm space robot is build by the Lagrangeapproach. The inversion dynamic control method is performedto solve the tracking problem. Then a serial of simulations oftracking control of two kinds of typical trajectory have *** tracking control results obtained at the simulations of theflexible dual-arm space robot.

关键词： Flexible Dual-Arm Space Robot Dynamic Modeling Inversion Dynamic Control

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Robust Human Detection from Complex Background by Radial Reach Filter

Robust Human Detection from Complex Background by Radial Rea...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Yutaka Satoh Hideki Tanahashi Yoshinori Niwa Kazuhiko Yamamoto HOIP Softopia Japan / JST 4-1-7 Kagano Ogaki City Gifu 503-8569 Japan HOIP Softopia Japan / JST 4-1-7 Kagano Ogaki City Gifu 503-8569 Japan HOIP Softopia Japan / JST 4-1-7 Kagano Ogaki City Gifu 503-8569 Japan Faculty of Engineering Gifu University 1-1 Yanagido Gifu 501-1193 Japan

A novel statistical approach is proposed for detect-ing human region from a complex background namedRadial Reach Filter (RRF). The RRF evaluates thelocal texture between a reference image (background)and the current scene by using Radial Reach Corre-lation (RRC). The RRC is a new robust dissimilaritymeasure and has a well-formed probabilistic model ofbinary or normal density, and the model is effective fordesigning some threshold values of the RRF or tuningthe monitoring system based on it in the real world ap-plications. Experimental results on real images showthe effectiveness of the proposed method.

关键词： image Robust Human Detection from Complex Background by Radial Reach Filter

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Fast Algorithm of Constrained Dynamic Matrix Control

Fast Algorithm of Constrained Dynamic Matrix Control

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： YU Shiming WANG Haiqing FENG Hao Institute of Intelligent Information System, Zhejiang University of Technology, Hangzhou, China, 310014,Institue of Industrial Process Control,Zhejiang University,Hang zhou,China,310027

Superfluous model parameters of dynamicmatrix control(DMC) lead to a heavy computationalburden in the computation of process predictive output andonline receding horizon optimization. To overcome theabove demerits of DMC, a fast algorithm of constrainedDMC is presented in this paper on the basis of stepresponse, by employing a model with fewer redundantparameters to approach step response of a plant. Becauseof far fewer parameters of the redundant-parameter modelthan non-parameterized models, the computational burdenof multi-step prediction and online receding horizonoptimization is greatly lightened. The effectiveness of thepresented algorithm is demonstrated by computersimulations by employing step response data collectingfrom a heat exchanger of a hot-water network.

关键词： fast algorithm constraints redundantparameter model least absolute error heat-exchanger

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An Empirically Based Path Loss Model for Indoor Wireless Channels in Laboratory Building Supachai Phaiboon

An Empirically Based Path Loss Model for Indoor Wireless Cha...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Department of Electrical Engineering. Faculty of Engineering Mahidol University Salaya, Phuthamonthon, Nakornprathom 73170, Thailand Department of Electrical Engineering.Faculty of Engineering Mahidol University Salaya Phuthamonthon Nakornprathom 73170 Thailand

This paper present a statistical indoor path loss modelderived from 1.8 GHz experimental data collected inlaboratory building. There are two models which areconsidered, 1) Distance-dependent path loss model and 2)Floor attenuation, factor (FAF) path loss *** have been developed based on the number of floors,concrete and mirror walls between the transmitter and thereceiver, and provide simple prediction rules which relatesignal strength to the log of distance. The standarddeviation between measured and predicted path loss is 8.7dB for the entire data *** floor attenuation factors(FAF), which describe the second path loss (in decible)caused by floors between transmitter and receiver are foundfor as many as three floors in the typical building.

关键词： Indoor Path Loss Models Linear Regression Laboratory building

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Numerical Simulation and Analysis of Voltage Controlling N+-N-P+ Model For BJMOSFET's DC Cbaracteristics

Numerical Simulation and Analysis of Voltage Controlling N+-...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Xiangliang Jin Jie Chen Yun Zeng Microelectronics R&D Center of the Chinese Academy of Sciences, Beijing, China, 100029 Department of Applied physics, Hunan University, ChanSha, China, 410082

A new power device, the Bipolar JunctionMatal-Oxide-Semiconductor Field Effect Transistors（BJMOSFET）, has been proposed. Based on thenumericai and analytical method, the voltage controllingN-N-P model for BJMOSFET's DC characteristics hasbeen obtained. Appling the software package ofMathematic, we have simulated both the voltage transferand the voltage output characteristically graphs ofBJMOSFET. Simulation results indicate that theBJMOSFET has a larger current density about 30-40%than the power MOSFET under the same operatingconditions and structure parameters, only that thethreshold voltage increases a little.

关键词： Power Device Bipolar Voltage controlling Numerical analysis

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AN EFFICIENT SCHEDULING METHOD FOR WEEKLY HYDRO-THERMAL UNIT COMMITMENT

AN EFFICIENT SCHEDULING METHOD FOR WEEKLY HYDRO-THERMAL UNIT...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： M.IGUCHI S.YAMASHIRO Kitami Institute of Technology 165 Koen-cho Kitami Hokkaido Japan Kitami Institute of Technology 165 Koen-cho Kitami Hokkaido Japan

This paper proposes a practical schedulingmethod of bydro-thermal unit commitment taking intoaccount the transmission network The propoed techniqueincludes a multi-stage screening algorithm for processingthe operation constraints and a heuristic approach toobtain a feasible solution efficiently. At first stage, wedecide an initial schedule by relaxing various operationconstraints of the thermal units and hydro plants. Secondstage processes the thermal unit operation constraints ofthe spinning reserve and minimum up and down timeconsidering the hydro system operation. At final stage, wescreen the violation of reservoir storage constraints ofhydraulically coupled plants. In each stage, an optimal DCpower flow is carried out for the calculation oftransmission losses. The application results for a model power systemincluding 53 buses, 12 thermal units and 24 hydro plants of7 rivers show the effectiveness of the proposed method.

关键词： AN EFFICIENT SCHEDULING METHOD FOR WEEKLY HYDRO-THERMAL UNIT COMMITMENT MDT

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