检索结果-内蒙古大学图书馆

作者： Jiang, Qingchao Yan, Xuefeng Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology MeiLong Road No. 130 Shanghai200237 China

Multiblock principal component analysis (MBPCA) methods are gaining increasing attentions in monitoring plant-wide processes. Generally, MBPCA assumes that some process knowledge is incorporated for block division;however, process knowledge is not always available. A new totally data-driven MBPCA method, which employs mutual information (MI) to divide the blocks automatically, has been proposed. By constructing sub-blocks using MI, the division not only considers linear correlations between variables, but also takes into account non-linear relations thereby involving more statistical information. The PCA models in sub-blocks reflect more local behaviors of process, and the results in all blocks are combined together by support vector data description. The proposed method is implemented on a numerical process and the Tennessee Eastman process. Monitoring results demonstrate the feasibility and efficiency. © 2014 ISA. Published by Elsevier Ltd. All rights reserved.

关键词： process monitoring

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Intelligent imaging algorithm of blast furnace radar array based on threshold synergism and data interaction

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Gongcheng Kexue Xuebao/Chinese Journal of Engineering 2015年 37卷 66-72页

作者： He, Shu-Rui Chen, Xian-Zhong Hou, Qing-Wen School of Automation University of Science and Technology Beijing Beijing100083 China Key Laboratory of the Ministry of Education of China for Advanced Control of Iron and Steel Process Beijing100083 China

A series of optimized signal processing algorithm was proposed for the radar system based on two-dimensional imaging of the burden surface. Firstly, a self-correlation algorithm was proposed to restrain background noises based on signal superposition. Secondly, the intelligent synergism adopting time-varying threshold on the basis of the prior knowledge of metallurgy and statistical characteristics of echo for multi-radar was accomplished. Finally, the interaction and synergism of data combined the parameters of industrial field with principal component analysis were proposed, as well as "outlier-removed α-β filter", and a suitable model of burden surface with outliers α-β filter algorithm was optimized. After practical verification, those improved signal processing methods were proved to enhance the stability of imaging and decrease the values of image fluctuation and abnormal proportion. The detecting probability and accuracy for the burden surface of the blast furnace radar were increased by 21.57% and 10.42%, respectively, which meet the requirements of real-time detection for the burden surface better. © All right reserved.

关键词： Blast furnaces

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Alternate convex search method for resource allocation in OFDMA AF relay networks with energy harvesting

Alternate convex search method for resource allocation in OF...

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IEEE International Conference on Communications in China (ICCC)

作者： Yanyan Shen Xiaoxia Huang Bo Yang Shuqiang Wang Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Ministry of Education Key Laboratory of System Control and Information Processing Shanghai China Department of Automation Shanghai Jiao Tong University Shanghai China

Joint optimization of the source transmission power, the relay transmission power, and the time switching (TS) ratio is investigated in orthogonal frequency division multiple access wireless powered relay networks. The relay does not have embedded energy supply and needs to first harvest energy from the received signals from the source before using amplify and forward transmission strategy for forwarding transmission. Time switching scheme is used by the relay for wireless information and power transfer. The resource allocation problem aims at maximizing the sum rate under the source transmission power, the relay harvested energy, and the TS ratio constraints. The joint resource allocation problem is formulated as an optimization problem, which is non-convex and generally difficult to solve. Then an alternate convex search algorithm, which alternately finds the optimal solution to one kind of variables by fixing the other two kinds of variables, is proposed. The convergence of the algorithm is proven as well. Simulations verify the better performance of the proposed algorithm compared with two related algorithms.

关键词： Relay networks (telecommunications) Energy harvesting optimization Resource management Wireless communication Convergence

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Improving differential evolution with impulsive control framework

Improving differential evolution with impulsive control fram...

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Congress on Evolutionary Computation

作者： Wei Du Sunney Yung Sun Leung Chun Kit Kwong Yang Tang Institute of Textiles and Clothing The Hong Kong Polytechnic University Hong Kong Hong Kong Polytechnic University Kowloon HK Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong The Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai China

ISBN: (纸本)9781479974931

Differential evolution (DE) is a simple but powerful evolutionary algorithm, which has been widely and successfully used in many areas. In this paper, an impulsive control method is introduced to the DE framework, and the impulsive DE (IpDE) is proposed for improving the performance of DE. The impulsive control operation instantly moves the individuals which do not update for continuous pre-defined generations to a desired state based on the individuals with better fitness values in the current population. This way, IpDE controls individuals' positions in the space domain according to the stagnation status of the population. In order to validate the effectiveness of IpDE, the presented framework is applied to the original DE algorithms, as well as several state-of-the-art DE variants. Experimental results exhibit that IpDE is a simple but effective framework to improve the performance of the studied DE algorithms.

关键词： Sociology Statistics optimization Radiation detectors Aerospace electronics Hybrid power systems Evolution (biology)

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Active Disturbance Rejection Trajectory Tracking control for Pneumatic Servo System Based on Backstepping Approach

Active Disturbance Rejection Trajectory Tracking Control for...

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第三十四届中国控制会议

作者： Yafei Yang Ling Zhao Xiaozhao Fan Zhixin Liu School of Electrical Engineering Yanshan University Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China College of Mechanical Engineering Yanshan University

ISBN: (纸本)9781467374439

This paper presents an improved active disturbance rejection controller to study the trajectory tracking problem of a pneumatic servo system. It is a challenging job to track a given trajectory for pneumatic system with strong nonlinearity. The designed active disturbance rejection controller consists of tracking differentiator, extended state observer and nonlinear *** differentiator is designed to arrange a transition process for the given signal and get its corresponding differential *** state observer has advantages in observing states and estimating the nonlinear part of system. Moreover, a nonlinear controller is derived on the basis of backstepping approach. Finally, simulation results indicate the capabilities of the proposed method.

关键词： Active disturbance rejection control,Backstepping approach,Rodless pneumatic cylinder,Trajectory tracking

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The green project of data management for industrial integration

International Journal of Database Theory and Application

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International Journal of Database Theory and Application 2015年第6期8卷 333-342页

作者： Tian, Yiming Zhu, keyu Pan, Ruoyu Liang, Changyong School of Computer and Information Hefei University of Technology Anhui Transport Interconnection Management Center Hefei China Institute of Computer Network Systems Hefei University of Technology Key Laboratory of Process Optimization and Intelligent Decision-making Ministry of Education Hefei China Key Technologies and Equipment of IOT of Highway Traffic Anhui Engineering Technology Research Center Hefei China

The green project fulfills the requests of industrial management and application by sharing data rather than isolating. The data center with energy-efficient equipment is correspondingly effective in industrial service, management and construction of information. This study suggests a green data center in the two-level framework as a basic factor in industrial integration with potent procedures. In the case of transportation, it processed validating data to resolve logistics and emergency operations. © 2015 SERSC.

关键词： Information management

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Sliding mode control for network control systems with packets dropout

Sliding mode control for network control systems with packet...

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第三十四届中国控制会议

作者： Luyang Zhang Ling Zhao Li Li Institute of Electrical Engineering Yanshan University Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China College of Mechanical Engineering Yanshan University

ISBN: (纸本)9781467374439

In this paper, we investigate the problems of stabilization of networked control systems with packets dropout via delta operator approach. A sliding mode controller is constructed to analyze the stochastic stability of the closed-loop networked control systems. The process of packets dropout is modeled as a Bernoulli process. Sufficient LMI conditions are developed to guarantee the existence of the discrete linear sliding surfaces. By solving the conditions, a linear sliding surface is characterized and a sliding mode controller is designed. Simulation results are given to demonstrate the effectiveness of the proposed approach.

关键词： Sliding mode control,network control systems(NCSs),delta operator system,packets dropout

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Fast finite-time consensus tracking of heterogeneous multi-agent systems with a virtual leader

Fast finite-time consensus tracking of heterogeneous multi-a...

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2014 International Conference on Manufacturing technology and Electronics Applications, ICMTEA 2014

作者： Xiao, Qiu Yun Wu, Zhi Hai Peng, Li Key Laboratory for Advanced Process Control of Light Industry of the Ministry of Education School of Internet of Things Engineering Jiangnan University Wuxi China

ISBN: (纸本)9783038353287

This paper proposes a novel finite-time consensus tracking protocol for guaranteeing heterogeneous multi-agent systems with a virtual leader to achieve the fast finite-time consensus tracking. The Lyapunov function method, algebra graph theory, homogeneity with dilation and some other techniques are employed to prove that heterogeneous multi-agent systems with a virtual leader applying the proposed protocol can reach the finite-time consensus tracking. Numerical simulations indicate that compared with traditional finite-time consensus tracking protocols, the proposed protocol can accelerate the convergence speed of the finite-time consensus tracking. © (2014) Trans Tech Publications, Switzerland.

关键词： Multi agent systems

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Visualization of layer distribution of furnace burden based on array radar of blast furnace

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Gongcheng Kexue Xuebao/Chinese Journal of Engineering 2015年 37卷 173-178页

作者： Hou, Qing-Wen Li, Xu Chen, Xian-Zhong Lu, Yi-Fang School of Automation & Electrical Engineering University of Science and Technology Beijing Beijing100083 China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing100083 China

The visualization of layer distribution of furnace burden in the time-radial-height dimension was presented based on array radar measured data. Abnormal data mining and data sampling method were adopted to obtain valid data. According to the burden falling model, the layer distribution of furnace burden was calculated. The cubic spline interpolation algorithm was used in the radial dimension and the improved least square method was proposed in the time dimension, which were used for conducting piecewise fitting of burden surface. The visualization system achieves multi-view visualization of burden surface and burden layer in the time-radial-height dimensions, which shows the change course of burden surface and provides an intuitive way to the blast furnace operation and control. © All right reserved.

关键词： Visualization

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Research on stator flux and rotor speed estimation for induction motor based on extended complex Kalman filter

Research on stator flux and rotor speed estimation for induc...

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International Conference on Machine Tool technology and Mechatronics Engineering, ICMTTME 2014

作者： Pan, Yue Dou Guo, Ying Wei Li, Hua De School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing China

ISBN: (纸本)9783038352464

This paper proposes a stator flux and rotor speed estimation method for induction motor (IM) based on extended complex Kalman filter (ECKF). A complex-valued model is adopted that allows a simpler and more effective state estimation of IM. And a third order ECKF has been designed for IM model by neglecting the mechanical equation, which is a valid hypothesis when the motor is operated at a constant rotor speed. The stator flux and rotor speed estimation obtained from ECKF are applied for direct torque control (DTC) of induction motor. This method for state estimation is more effective and easier than the one performed on the corresponding real-valued model, as it obtains observability conditions directly in terms of stator current and flux complex-valued vectors. The proposed ECKF achieves a good performance in DTC of IM. Simulation experiment results in Matlab/Simulink environment validate the proposed method. © (2014) Trans Tech Publications, Switzerland.

关键词： Induction motors

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