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Song X.G.,Beijing Aritime Intelligent Control Ltd. Co | Hu Z.H.,University Of Science And Technology Liaoning | He X.Q.,University Of Science And Technology Liaoning | Tu L.P.,University Of Science And Technology Liaoning
Applied Mechanics and Materials | Year: 2013

The strip thickness control of 1500 for hot rolling with the MATLAB simulation not only improve the accuracy [1], the dynamic and steady state performance of the system [2], but also enhance the robustness of the system by the establishment of expert fuzzy controller. The expert fuzzy control in hot strip thickness control provides a new and available application example in this paper. © (2013) Trans Tech Publications, Switzerland.

Song X.,Beijing Aritime Intelligent Control Ltd. Co | Hu Z.,University Of Science And Technology Liaoning | He X.,University Of Science And Technology Liaoning | Tu L.,University Of Science And Technology Liaoning
Advanced Materials Research | Year: 2013

The prediction and control of the hot strip's width is one of the key factors to reducing metal loss in hot roughing. Bayesian approach can control the parameters of neural network by calculating some super-parameters. This paper proposes a prediction model of the hot-rolled steel strip's width based on Bayesian Neural Network, through application on the data of a 1500mm steel rolling production line in China, the MAE (Mean Absolute Error) between the predicted width value and real width value less than 10mm, this result shows that the precision of prediction is superior to some traditional mathematical model such as BP-neural networks. In this paper, we conclude that Bayesian neural network can improve the forecast precision of the hot strip's width. © (2013) Trans Tech Publications, Switzerland.

Wang S.,Jilin Normal University | An C.,Beijing Aritime Intelligent Control Co. | Sun X.-X.,Jilin Agricultural Science and Technology College | Du X.,Shanghai University
2010 Chinese Control and Decision Conference, CCDC 2010 | Year: 2010

This paper is concerned with the average consensus problem of networked multi-agent systems over memory communication channels with packet losses. The focus is on a particular case: uniform packet losses(i.e. all the communication links in the network may be failed simultaneously). The objective is to compare the performance of the corresponding memoryless and memory consensus protocols. We show that the memory consensus protocol always provides a better performance than the corresponding memoryless one, moreover, greater possibility of data drop will produces greater convergence rate gap between the memory and memoryless protocols. Simulations are included for illustration. ©2010 IEEE.

Lan Z.,CAS Institute of Electrical Engineering | Lan Z.,Automation Research and Design Institute of Metallurgical Industry | Li C.,CAS Institute of Electrical Engineering | Li Y.,Automation Research and Design Institute of Metallurgical Industry | And 4 more authors.
2013 International Conference on Electrical Machines and Systems, ICEMS 2013 | Year: 2013

Nowadays the medium and high voltage large power AC-DC-AC converters are used in various industrial fields. The integrated gate commutated thyristor (IGCT) is applied to high power AC-DC-AC converter on a large scale due to its excellent characteristics. In this paper the investigation on IGCT-based five-level NPC/H-bridge high power converter is proposed. Each phase of the five-level NPC/H-bridge converter is composed of two IGCT-based three-level neutral point clamped (NPC) legs in an H-bridge form. The converter adopts modular design and the module of IGCT-based three-level NPC legs has been developed. One type of modulation scheme based on three-level SVPWM is introduced and the experiment result is showed in this paper. © 2013 IEEE.

Han J.,Sinosteel Equipment and Engineering CO. | Zhang R.,Beijing Aritime Intelligent Control CO. | Ye Y.,Zhejiang Shengyuan Chemical Fibre CO.
Proceedings of the 2011 Chinese Control and Decision Conference, CCDC 2011 | Year: 2011

This paper introduces to an example applied the technology of the conversion frequency to the polyester production line of Shengyuan in Zhejiang successfully, and discusses the particular application and using effect of inverter technology to the control process of production technology in the polymerization, mixing and in the parameter controlling such as speed volume and current volume. This paper describes the application of conversion frequency to driving system on the polyester production line. The domestic-made frequency converter driving system has taken the place of imported one entirely, strengthened the ability to manufacture the equipment and installation autonomously, and reduced the costs of the equipment greatly. © 2011 IEEE.

Chen H.,CAS Institute of Automation | Wu C.,Beijing Aritime Intelligent Control Co. | Sun Y.,CAS Institute of Automation | Zhao H.,CAS Institute of Automation
Lecture Notes in Electrical Engineering | Year: 2013

The growing requirements of steel products qualities bring even tricky restrictions to the hydraulic cylinder which acts as a screw down to maintain the rolling spaces precisely. However, faults and disfunctions are unavoidable and bring underlying safety issues. Working with un-expected loading is one of major impact that may cause catastrophic consequence happen to the cylinder, as the classical diagnostic process to-some-extent lack of cross-validating and time-consuming, 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, application of modified image based acoustic emission approach to generate visual effects, as well as the application of principal component analysis to project the profiles onto the 3D plane for further analyses. Through the analysis of image based profiles, the subtle differences of various cylinder conditions can be examined using the pixel and intensity values. By assessing the projection of profiles in the principal component space, 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. © 2013 Springer-Verlag Berlin Heidelberg.

Han M.,Dalian University of Technology | Zhao Y.,Dalian University of Technology | Yang X.-L.,Beijing AriTime Intelligent Control Co. | Lin D.,Steelmaking Plant of Benxi Steel Sheet Co.
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | Year: 2011

To deal with the problem that the classical relevance vector machine is sensitive to outliers, we present a novel robust relevance vector machine. This machine is applied to predict the endpoint carbon content and temperature of the basic-oxygen-furnace(BOF) steelmaking. Each training sample is assumed to have its individual coefficient of noise variance. With the increase of the prediction error during training procedure, the coefficients of outliers gradually decrease, reducing the impact of outliers. In addition, the iterative formulas for the optimization of hyper-parameters are derived in the Bayesian evidence framework. Simulation results of benchmark test data and the BOF steelmaking data show that the proposed mode achieves high prediction accuracy and good robustness.

Zhao J.,Beijing Aritime Intelligent Control Co.
2013 25th Chinese Control and Decision Conference, CCDC 2013 | Year: 2013

Take Xiaoguanzhuang Iron Mine of LuZhong as the research object, introduce design ideas, system environment, hardware configuration of automatic control system for mine well hoist, account the technological process of the system and communication configuration of FM458 and ABB ACS6000C for the important. Automatic control system for mine well hoist is a high safety system, and for the important is to control exactly. This system make a curve for travel control, let the hoist device move according to the curve, and has multiple protection to ensure hoist device stop at unload position exactly, only has 0.01m error. This passage use block diagram make reader easily understand the constitute and communication of the whole system. © 2013 IEEE.

Zou X.,Beijing Aritime Intelligent Control Co. | Hu Y.,Beijing Aritime Intelligent Control Co. | Song X.-R.,Beijing Aritime Intelligent Control Co. | Wang J.-N.,Beijing Aritime Intelligent Control Co.
Journal of Iron and Steel Research | Year: 2015

In order to model the lateral curvature defect of plate rolling and offer theory support for control of lateral curvature, according to the limitations of influence function method and the shortage of P-H graph, under the assumption of rigid roll and parabola distribution of work roll crown, through theoretical analysis, the equation of rigid tilting of roll gap, wedge of outlet rolled work-piece equation, work-piece thickness distribution equation, separating rolling force distribution equation, force balance equation and torques equilibrium equation were derived. Based on these equations, the mathematic models of lateral curvature of rolled work-piece and corresponding control model were obtained. Theoretical study shows that no matter what kind of factors cause lateral curvature, the control model is cohering, as long as the distribution of temperature in lateral direction is symmetrical. The research work offers theory foundation for the feedback control of lateral curvature.

Sun X.-X.,Jilin Agricultural Science and Technology College | An C.,Beijing Aritime Intelligent Control Co. | Wang S.,Jilin Normal University
2010 Chinese Control and Decision Conference, CCDC 2010 | Year: 2010

This paper considers the problem of robust generalized H2 filtering for discrete-time linear systems with polytopic uncertainties. Based on parameter-dependent Lyapunov functions combined with Finsler's lemma, new conditions for the solvability of the problem are given in terms of linear matrix inequalities (LMIs). Compared to the existing results, more slack variables are introduced to provide extra freedom for the generalized H 2 optimization which lead to improving the performance and reducing the conservatism further. An example is give to illustrate the effectiveness of the proposed method. ©2010 IEEE.

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