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IEEE International Conference on Mechatronics and Automation

作者： Wa Gao Fusheng Zha Mantian Li Pengfei Wang Baoyu Song State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang Province China Department of Mechanical Design Harbin Institute of Technology Harbin Heilongjiang Province China

ISBN: (纸本)9781479939800

This paper develops a sound enhancement algorithm based on modelling of cochlea. By integrating the mechanical tuning and the neuron filtering in cochlea, the derivation process is discussed. For illustration, the developed algorithm is applied to the sound enhancement in the condition of low Signal Noise Ratio (SNR) environments. Compared with the fast wavelet transform method, the performances of proposed algorithm in output SNR, output maximum amplitude and computation time tested in LPC 2148 are remarkably improved and the effectiveness are clearly demonstrated.

关键词： Signal to noise ratio Wavelet transforms 1f noise Gaussian noise Filtering

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Composite single neural PID controller based on fuzzy self-tuning gain and RBF network identification

Composite single neural PID controller based on fuzzy self-t...

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Chinese Control and Decision Conference, CCDC

作者： Bo-yang Xing Li-ye Yu Zhong-kai Zhou Automation Research and Design Institute of Metallurgical Industry Research center Beijing 100071 China State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Beijing 100071 China

Nonlinear, time-varying and uncertainty matter is an important issue in order to improve conventional PID control technology due to the rapid development of control technologies for a wide range of industries. Artificial neural PID controller such as the single neural PID controlling is a current interesting research topic because of its potential ability of auto-tuning by simulating the human brain functions. In the conventional single neural network control method, it is difficult to realize a high learning speed and online tuning PID gains. A new approach to improve the single neuron PID control technology is to combine fuzzy controlling with RBF neural network. Such a composite neuron adaptive PID controller with fuzzy self-tuning gain takes advantages of online identification and self-tuning gain thus to speed up the learning process and rationally adjust the gain coefficient, providing a much improved solution to reduce overshoot and to speed up self-learning. In this article, we show our two simulations including a second-order motion control and time-delay model to verify the effectiveness of the composite neuron adaptive PID controller method. We conclude that the adaptive fuzzy gain compound neural network PID control is superior in controlling nonlinear and time-delay objects over the conventional method. The improved control algorithm has excellent tracking performance and accuracy to meet the requirements for the next generation of intelligent controllers.

关键词： Neurons Biological neural networks Process control Radial basis function networks Vectors PD control

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Study on optimization of shutdown and critical model for VVER-1000

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Hedongli Gongcheng/Nuclear Power Engineering 2013年第SUPPL.1期34卷 80-83+98页

作者： Lu, Zong-Jian Liu, Tong-Xian Wang, Jin-Yu Wu, Lei Yu, Ying-Rui National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

On the premise of safety, economy is one of the important objectives of nuclear power plants. For VVER-1000, there are several cases of operation modes when the plant is off the grid, such as the critical operation after refueling, the hot shutdown and critical operation, and the critical operation after test. For the purpose to reduce the time of the operations, the consumption of materials, and the amount of waste water produced, the optimization researches are carried out on these cases. The qualitative and quantitative analysis is carried out, on the configurations of the control rod and boric acid, which are the important factors to influence the shutdown and critical operations. The general steps and the basic principles of the optimizations are described. Three cases are optimized.

关键词： Boric acid

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Parameter identification for iron and steel enterprise steam network model

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Journal of Networks 2013年第2期8卷 421-428页

作者： Ma, Yong Sun, Yanguang Zeng, Yujiao State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Automation Research and Design Institute of Metallurgical Industry Beijing China Shanghai Aritime Information Technology CO. LTD Shanghai China

Mathematical models are used nowadays to describe behavior of the real-life Steam Network. This article establish a coupled thermo-hydraulic mathematical model for steam network by adopting a set of equations The model is simplified according to steam flow features in pipe networks. It is concluded that coupled iteration can be employed in steam network. It is well-known fact that, Steam Network mathematical model must be identified first. Here, identification is defined as process in which a number of Steam Network model parameters are adjusted until the model mimics behavior of the real Steam Network as closely as possible. The case study demonstrates that the integrated identification method gives modelers the maximum flexibility to improve the model accuracy and robustness. Test result indicates the advantage of genetic algorithm. © 2013 ACADEMY PUBLISHER.

关键词： Genetic algorithms

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Robust Stabilization for Standard Discrete-Time Fuzzy Singularly Perturbed systems: A Spectral Norm Approach

Robust Stabilization for Standard Discrete-Time Fuzzy Singul...

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第25届中国控制与决策会议

作者： Liye Yu Jinxiang Chen State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Automation Research and Design Institute of Metallurgical Industry China Iron ＆ Steel Research Institute Group

ISBN: (纸本)9781467355322

This paper presents a new approach for stabilizing standard discrete-time fuzzy singularly perturbed systems（SPSs） via a state feedback controller. Without using conventional Lyapunov function, based on the matrix spectral norm of the closed-loop system, a new ε-independent sufficient condition is presented. In contrast to the existing results, the proposed method can improve the upper bounds of singular perturbation parameter ε. Two examples are provided to illustrate the reduced conservatism of our results.

关键词： Singularly perturbed systems discrete-time systems nonlinear systems linear matrix inequalities（LMIs） spectral norm robust control.

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A reconfigurable routing method for fault-tolerant mesh-based network on chip

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Journal of Information and Computational Science 2013年第1期10卷 157-165页

作者： Liu, Yanhua Ruan, Ying Lai, Zongsheng Sun, Ling Institute of Microelectronics Circuit and System East China Normal University Shanghai 200241 China Jiangsu Provincial Key Lab. of ASIC Design Nantong University Nantong 226019 China State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As the semiconductor industry advances to nano-technology points, Network on Chip (NoC) components are becoming vulnerable to errors during the system operation. Consequently, fault-tolerant techniques for NoC are needed to achieve high reliability. In this paper, we present a fault-tolerant routing method to tolerate faulty routers in a two-dimension (2D) mesh-based NoC. With this method, the system can have a multi-router fault-tolerant capability and the routing path can be dynamically reconfigured to support different situations caused by faulty routers in NoC. Fault-tolerance capability and system performance of the proposed method are evaluated through analysis and simulations. Theoretical analysis and simulation results show that the proposed method can enhance the reliability of system and offer considerable fault-tolerance capability. © 2013 by Binary Information Press.

关键词： Network-on-chip

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Supercritical water-cooled reactor CSR1000 core thermal-hydraulics characteristics analysis

Supercritical water-cooled reactor CSR1000 core thermal-hydr...

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LWR Fuel Performance Meeting, Top Fuel 2013

作者： Bi, Shumao Lu, Chuan Lu, Jianchao Li, Xiang Zeng, Xiaokang Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China No. 25 3rd Section South 2nd Ring Road Chengdu Sichuan 610041 China CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology Nuclear Power Institute of China No.25 3rd Section South 2nd Ring Road Chengdu Sichuan 610041 China

ISBN: (纸本)9781629937212

CSR1000(China Supercritical water-cooled reactor with the rated electric power of 1000 MWe) put forward by NPIC (Nuclear Power Institute of China) proposed a new design of fuel assembly cluster with two-pass core arrangement. In this paper, subchannel analysis code ATHAS which has added new heat transfer and friction coefficient correlations obtained from experiment on T/H characteristics of SCW carried out by NPIC has been used to analyze the thermal-hydraulics characteristics of CSR1000. The subchannel analysis results have shown that the design basically meets the requirements of thermal-hydraulics design and remains some margins for safety analysis.

关键词： Friction

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The study of discharge light on XLPE-SIR composite medium interface

The study of discharge light on XLPE-SIR composite medium in...

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2013 International Conference on Precision Mechanical Instruments and Measurement technology, ICPMIMT 2013

作者： Chen, Xin Gang Zhang, Chao Feng Gu, Liang Cao, Mei Qing Chongqing University of Technology Chongqing China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing China State Nuclear Electric Power Planning Design and Research Institute Chongqing Corporation Chongqing China Chongqing Hechuan District Power Supply Company China

ISBN: (纸本)9781629933405

The cross-linked polyethylene cable is largely used in power-supply system of the city. As the length of the power cable is concerned with the technology and construction, the center joint is largely employed, and the fault of the power cable is often found in the center joint. The discharge light has been seen on the face of the XPLE-SIR in work. The carbonization granule which appears after the discharge is the primary cause of the insulation degradation. A sample is designed, and the alternate electric-field rise on it to imitate the operational aspect. This paper analyses the relation of the discharge light, discharge current and carbonization granule. We find that it is feasible according to study the interface discharge light to deduce the characteristic of discharge and carbonization granule, and judge the degree of the interface insulation degradation. © 2013 Trans Tech Publications Ltd, Switzerland.

关键词： Carbonization

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Automatic gauge control hydraulic cylinder state identification using modified image based acoustic emission profile

Automatic gauge control hydraulic cylinder state identificat...

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2013 International Conference on Precision Mechanical Instruments and Measurement technology, ICPMIMT 2013

作者： Chen, H. Lu, Y. Zhao, H. Sun, Y. Wang, P. Huang, J. State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Automation Research and Design Institute of Metallurgical Industry Beijing 100071 China Power Electronic and Motor Drive Engineering Research Center North China University of Technology Beijing 100144 China School of Automation Beijing Institute of Technology Beijing 100081 China

The growing requirements of steel products qualities bring even tricky restrictions to the rolling process. With the fast response, reliable control and low maintenance requirements, the hydraulic automatic gauge control system has been widely applied to screw down the roller to maintain the precise rolling spaces for product quality control. Regarding to non-stopped heavy duties charged to the system, unavoidable faults and disfunctions not only influence the product quality, but also bring underlying safety issues. The hydraulic cylinder is the executing component of the roller screw down and it has the dominant percentage of hydraulic components' faults. Working with unexpect loading is one of major impact factor that causes several chain-effects happened to the cylinder, as the classical diagnostic process is lack of cross-validating and timeconsuming, the paper proposes the potentials of using acoustic emission to fill the dilemmas. The works include the data acquisition process to record the ultrasound acoustic signals from the hydraulic cylinder during it was loaded with 6 types of conditions, a modified image based acoustic emission approach constructed by using 8 significant waveform features was applied to generate visual effects and transform the cylinder acoustic emission signals under various loadings to a uniform format, the subtle differences among various loadings can be observed based on the pixel and intensity changes of the images. By applying the principal component analysis to project the acoustic emission image profiles onto the 3D plane, a clear trajectory can be observed with normal and overload conditions allocated upon the positive and negative sides of the axis. The result provided not only the potential of using acoustic emission for dynamic state identification of the subtle changes, but also opens up the possibility of preventive measures to the cylinder at risks in the future. © 2013 Trans Tech Publications Ltd, Switzerland.

关键词： Cylinders (shapes)

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Control strategy of microgrid load distribution in autonomous operation

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Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and technology) 2013年第SUPPL.1期44卷 401-406页

作者： Chen, Ke Jin, Chuanfu Wang, Jinfeng State Key Laboratory of Hybrid Process Industry Automation System and Equipment Technology Automation Research and Design Institute of Metallurgical Industry China Iron and Steel Research Institute Group Beijing 100081 China

Frequency and voltage controllers were designed based on the virtual synchronous generator (VSG) algorithm, from which the droop characteristic of VSG was derived. The theoretical basis of power decoupling and load share was given. The load-side voltage droop produced by virtual synchronous reactance was studied, and the impact on reactive load distribution of line impedance was analyzed through the droop characteristic curve. An improved control strategy based on the reference input compensation of voltage controller was proposed. The Matlab simulation results show the effect of the proposed control strategy.

关键词： Synchronous generators

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