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第三十三届中国控制会议

作者： Qiao Zhu Yi-Xin Yin Han-Qing Cheng Xian-Zhong Chen School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing

ISBN: (纸本)9781479947249

The proper control of the ratio of ore to coke distribution(ROCD) can achieve energy saving of the blast furnace(BF).In order to achieve the desired ROCD,it is meaningful to search best charging system(especially the burden matrix).This paper deals with the problem of burden distribution control based on the adaptive genetic algorithm and multi-radar ***,the definition of the ratio of ore to coke(ROC) and the desired ROCD are ***,according to the desired ROCD,the concrete steps of searching the best burden matrices are presented based on the adaptive genetic ***,the operators of the adaptive genetic algorithm(especially the mutation operator) are properly adjusted,according to the actual production process of the bell-less ***,three computational experiments demonstrate the effectiveness of the method.

关键词： Bell-less blast furnace Adaptive genetic algorithm Ratio of ore to coke distribution Multi-loop burden matrices.

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3D reconstruction of single rising bubble in water using digital image processing and characteristic matrix

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Particuology 2013年第2期11卷 170-183页

作者： Yuchen Bian Feng Dong Weida Zhang Hongyi Wang Chao Tan Zhiqiang Zhang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University School of Electrical Engineering and Automation Tianjin Polytechnic University

Reconstructing the shape of a bubble will lay a firm foundation for further description of the dynamic characteristics of bubbly flow, especially for a single rising bubble or separate bubbles whose interaction could be neglected. In this case, the rising bubble is usually simulated as an ellipsoid consisting of two semi-eUipsoids up and down. Thus the projected image of a bubble consists of two semi-ellipses. In this paper, a method for reconstructing the ellipsoid bubble model is described following digital image processing, using the Hough transform in 2D ellipse parameter extraction which could cover most of the bubble edge points in the image. Then a method based on characteristic symmetric matrix is described to detect 3D bubble ellipsoid model parameters from 2D ellipse parameters of projection planes. This method can be applied to bubbles rising with low-velocity in static flow field much in conformity with the projection theory and the shape variation of the rising bubble. This method does not need to solve nonlinear equation sets and provides an easy way to calculate the characteristic matrix of a space ellipsoid model for deformed bubble. For bubble application, two assumed conditions and a calibration factor are proposed to simplify calculation and detection. Errors of ellipsoid center and three axes are minor. Errors of the three rotation angles have no negative effect on further study on bubbly flow.

关键词： Bubble Digital image processing Parameter extraction Ellipsoid model Reconstruction Characteristic matrix

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A sequential linear programming matrix method to insensitive h ∞ output feedback for linear discrete-time systems

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Journal of Dynamic Systems, Measurement and control, Transactions of the ASME 2014年第1期136卷 014506-014506页

作者： Guo, Xiang-Gui Yang, Guang-Hong Tianjin Key Laboratory for Control Theory and Applications in Complicated System School of Electrical Engineering Tianjin University of Technology Tianjin 300384 China State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering Northeastern University Shenyang 110819 China

This paper studies the problem of designing insensitive H∞ output-feedback controllers for linear discrete-time systems. The designed controllers are insensitive to additive/multiplicative controller coefficient variations. An LMI-based procedure, which is a sequential linear programming matrix method (SLPMM), is proposed to solve the considered problem which is a nonconvex problem itself. It is worth mentioning that the nonfragile control design method is adopted to obtain an effective solution for accelerating convergence of SLPMM algorithm due to the fact that a good starting point for the iteration is very important. © 2013 by ASME.

关键词： controllers

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Burden Distribution Calculation of Bell-Less Top of Blast Furnace Based on Multi-Radar Data

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Journal of Iron and Steel Research International 2013年第6期20卷 33-37页

作者： ZHU Qiao L Cheng-long YIN Yi-xin CHEN Xian-zhong School of Automation and Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process

The burden distribution real-time estimation problem of multi-loop charging based on the real multi-radar data is *** , an iterative algorithm is introduced to calculate the radial coordinate of the *** , based on the multi-radar data , the burden profile is estimated by a cubic-curve equation at the end of the multi-loop *** , the burden profile before the next multi-loop charging is calculated based on multi-radar data by considering the impact of burden *** the basis of these burden profiles , a more accurate thickness ratio of ore to coke （ RO/C ） at the radial direction of blast furnace can be *** , an example is given to calculate the burden profiles and RO/C by using the real multi-radar data sampled from Baosteel , which shows the effectiveness of the method introduced.

关键词： blast furnace multi-radar data burden distribution multi-loop charging RO/C

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Stability Analysis of Nonlinear Self-excited Vibration in Cold Rolling Main Drive System

Stability Analysis of Nonlinear Self-excited Vibration in Co...

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第26届中国控制与决策会议

作者： Yang Xu Li Qing Peng Kaixiang Tong Chaonan Ding Dawei Key Laboratory of Advanced Control of Iron and Steel Process School of Automation and Electrical EngineeringUniversity of Science and Technology Beijing State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University

A nonlinear self-excited vibration model of main drive system in cold rolling is established. The mechanism of torsional vibration in main drive system stability is discussed within multiple scale method as well as Hopf bifurcation theorem. Then, the periodic solutions and condition of Hopf bifurcation are derived and the influence by subcritical/supercritical bifurcation is analyzed. Based on the simulation experiments with actual industrial data, the previous theoretical analysis and nonlinear model have been testified.

关键词： Nonlinear Modeling,Self-excited Vibration,Stability Analysis,Main Drive System,Cold Rolling process

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Implementation of PFC (Predictive Functional control) in a petrochemical plant

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IFAC Proceedings Volumes 2014年第3期47卷 5333-5338页

作者： R. Haber U. Schmitz K. Zabet Institute of Process Engineering and Plant Design Laboratory of Process Automation Cologne University of Applied Science D-50679 Köln Betzdorfer Str. 2 Germany fax: +49-221-8275-2836 and Department for APC and process control technology Rheinland Refinery Shell Deutschland Oil GmbH Ludwigshafener Strasse 1 D-50389 Wesseling

PFC (Predictive Functional control) is a simple but very effective SISO (Single-Input Single- Output) predictive controller which does not require any matrix inversion or numerical minimization of a cost function, therefore it is easy to realize in a PLCs (Programmable Logical controllers) or a DCS (Decentralized control Systems). The manipulated variable and/or its increment, as well other variables can be constrained easier than when using PI(D) (Proportional, Integrating, and Derivating) controller. Furthermore PFC handles the dead time process better than with PI(D) controller. Three industrial applications of PFC for two distillation columns and a reactor in a petro-chemical plant were implemented and the experiences are presented here.

关键词： predictive functional control distillation column programmable logical controller

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Optimal Tracking control for a Class of Continuous Time Complex-valued Systems Based on Adaptive Dynamic Programming Algorithm

Optimal Tracking Control for a Class of Continuous Time Comp...

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第三十三届中国控制会议

作者： Ruizhuo Song Frank L.Lewis Qinglai Wei Wendong Xiao School of Automation and Electrical Engineering University of Science and Technology Beijing University of Texas at Arlington Research Institute University of Texas at Arlington State Key Laboratory of Synthetical Process Automation Northeastern University The State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

ISBN: (纸本)9781479947249

Based on the adaptive dynamic programming(ADP) algorithm,a new optimal tracking control method is proposed for a class of complex-valued nonlinear systems in this *** tracking error is rst de ned,and then the performance index function which is about the tracking error is *** transformation,the complex-valued tracking error system is mapped into *** optimal control method for the tracking error system is *** two neural networks are used to be as the critic network and action network,*** is proven that the closed-loop system is uniformly ultimately bounded based on Lyapunov ***,the simulation study is given to show the effectiveness of the proposed optimal tracking control method for complex-valued nonlinear system.

关键词： Adaptive dynamic programming,optimal control,neural network,complex-valued

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Comparing Reconstruction Algorithms for Different Size of Object in Electrical Tomography

Comparing Reconstruction Algorithms for Different Size of Ob...

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2013 IEEE 11th International Conference on Electronic Measurement & Instruments

作者： Wang Chao He Xiaorong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University

ISBN: (纸本)9781479907571

Electrical tomography is widely used in industrial process and clinical science because of its characteristics of fast response and continuous monitoring. Image reconstruction algorithms are proposed and developed to improve the quality of reconstructed image. In the continuous monitoring, the size of object is always changing, so it is important to compare imaging ability of different algorithms for different size of object. In this paper, circle models and square models of different size object are established. Through the analysis of image error and correlation coefficient, ten image reconstruction algorithms are evaluated detailed.

关键词： electrical tomography, evaluation parameter, evaluation of image reconstruction algorithm

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Finite-Time control for Uncertain Markovian Jump Systems With Disturbance and Input Constraint

Finite-Time Control for Uncertain Markovian Jump Systems Wit...

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第三十二届中国控制会议

作者： ZUO Zhiqiang LI Hongchao WANG Yijing Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479900305

In this paper,the problem of finite-time control for a class of uncertain Markovian jump systems subject to disturbance and input constraint is *** system to be considered is more general where only partial information of transition probabilities is *** practical systems,the amplitude that can be made to the manipulated variables is always limited. Therefore,a control algorithm should be considered in this situation.A sufficient condition is established to ensure that the state trajectory remains in a bounded region of the state space in mean square sense over a fixed time *** on it, the corresponding finite-time stochastic stabilization criterion is proposed by considering the input constraint simultaneously. Numerical examples are given to show the validity of the proposed methods.

关键词： Markovian Jump Systems Finite-Time control Input Constraint

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Annular Electrode Electrostatic Method of Dilute Phase Gas-Solid Two-Phase Flow Concentration Measurement

Annular Electrode Electrostatic Method of Dilute Phase Gas-S...

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2013 IEEE 11th International Conference on Electronic Measurement & Instruments

作者： Wang Chao Zhang Yishun Wu Weiping Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University

ISBN: (纸本)9781479907571

The measurement of solid phase particles concentration is one of the key parameters of gas-solid two-phase flow detection. This paper studies the method which is solid phase particles concentration of gas-solid two-phase flow detection based on the annular electrode electrostatic sensors. On the basis of existing annular electrode electrostatic sensors, through the method of experiment and derivation, the correlative relationship between electrostatic signal fluctuation and solid phase particles concentration is verified. Further analysis shows that using the standard deviation of electrostatic signal detecting solid phase particles relative concentration is feasible.

关键词： gas-solid two-phase flow, electrostatic method, solid phase particles concentration

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