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Hot rolling technology for producing high quality stainless steel at No. 3 hot strip mill in Chiba Works

Kawasaki Steel Technical Report 1999年第40期 16-22页

作者： Egawa, Naoto Ishizuka, Haruhiko Hiruta, Toshiki Hot Rolling Technology Sec. Hot Rolling Dept. Chiba Works Stainless Steel Control Sec. Technical Control Dept. Chiba Works Mech. Proc. Instrum. Control Lab.

No. 3 hot strip mill in Chiba Works of Kawasaki Steel started its operation in May 1995. The mill meets the strict quality requirements of customers in recent years and expands the product size of stainless steel. The dimensional and surface quality of stainless steel at No. 3 hot strip mill further advanced by introducing highly accurate and high-response thickness gauge control, set-up and dynamic control for optimizing crown and flatness at pair cross mill, equipped with on-line roll grinder, and edge-seam control. (1) Product size of hard steel strips such as stainless steel has been expanded and high accuracy in longitudinal thickness has been achieved over the full length of hot rolled strips. (2) Low crown of stainless steel has been able to be obtained by developing highly accurate crown and flatness control. (3) Reduction of the edge-seam defects of stainless steel has been developed by using the sizing press.

关键词： Stainless steel

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Design of Adaptive control System for Intake Air Volume of Piston Compressor Based on Fuzzy Neural Network PID controller 3

Design of Adaptive Control System for Intake Air Volume of P...

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3rd IEEE International Conference on Electronic Technology, Communication and Information, ICETCI 2023

作者： Yuheng, Han Qiu, Xia Guangzhong, Hu Ping, Wang Sichuan University of Science & Engineering College of Mechanical Engineering Yibin China Sichuan University of Science & Engineering Sichuan Provincial Key Lab of Process Equipment and Control College of Mechanical Engineering Yibin China Sichuan University of Science & Engineering Key Lab. of Adv. Mfg. Technol. of Panzhihua City Sichuan Prov. Key Lab of Proc. Equip. and Control College of Mechanical Engineering Yibin China

ISBN: (纸本)9798350398410

Piston compressors are widely used in chemical industry and other fields. At present, the market puts forward a working condition requirement for piston compressor to adapt to the change of intake air volume. However, the classical PID control has shortcomings in stability time, anti-interference and PID parameter online tuning, which does not meet the requirements of working conditions. Therefore, this paper designs the adaptive control system of the intake air volume of the piston compressor according to the variable speed air volume regulation strategy and establishes a mathematical model. Using BP neural network and fuzzy control theory, a fuzzy neural network PID controller is built. Using Matlab.Simulink, a step response simulation experiment is carried out. Using C# language, the upper computer of the system is programmed. The simulation results show that the stability time of the intake air volume adaptive control system based on the fuzzy neural network PID controller is 1.63 seconds, which is 0.55 seconds and 1.6 seconds faster than that of the intake air volume adaptive control system based on the adaptive fuzzy PID controller and the classical PID controller respectively, and its anti-interference ability is stronger, which is more suitable for the realization of the intake air volume adaptive control system controller under this working condition. © 2023 IEEE.

关键词： Fuzzy neural networks

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AKL networks for industrial analyzer modeling and fault detection

AKL networks for industrial analyzer modeling and fault dete...

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作者： Wang, Haiqing Song, Zhihuan Li, Ping Ding, Steven X. National Lab. of Industrial Control Technology Inst. of Ind. Proc. Cont. Zhejiang University Hangzhou 310027 China University of Duisburg-Essen Inst. Auto. Cont. and Comp. Sys. Bismarckstr. 81 BB-511 47057 Duisburg Germany

ISBN: (纸本)9783902661142

An adaptive kernel learning (AKL) networks is proposed to model the industrial analyzer and meanwhile monitor its potential faults, which utilizes kernel function and geometric angle to build an adaptive network topology. Two forms of learning strategies for AKL networks are obtained and their corresponding recursive algorithms are developed, respectively. The proposed AKL algorithm applies to nonlinear MIMO modeling issues with controlled generalization ability. Numerical simulations on Tennessee Eastman (TE) proc.ss show that the proposed AKL networks can learn and monitor online the dynamics of the composition analyzer using relatively small samples, under stochastic and fault-existing environment. Copyright © 2006 IFAC.

关键词： Learning algorithms

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Nonlinear Active Disturbance Rejection control for Vehicle Active Suspension System 3

Nonlinear Active Disturbance Rejection Control for Vehicle A...

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3rd International Conference on Electronic Information Engineering and Computer Science, EIECS 2023

作者： Dai, Xianglian Zhao, Chunzhe Xu, Rong Chongqing Three Gorges University School of Electronics and Information Engineering Wanzhou China Chongqing Three Gorges University Chongqing Engineering Research Center of Internet of Things and Intelligent Control Technology Key Lab. of Intelligent Info. Proc. and Contr. of Chongqing Munic. Institutions of Higher Education Wanzhou China

ISBN: (纸本)9798350316674

Nonlinear active disturbance rejection control (ADRC) is designed for the suspension system of the quarter vehicle model with the two-degree freedom. It is compared with other active suspension systems based on PID and linear ADRC scheme. The variance of the errors reveals that the nonlinear ADRC suspension system promotes the vehicle acceleration, the suspension dynamic disturbance, and wheel dynamic load. © 2023 IEEE.

关键词： active disturbance rejection control active suspension system extended state observe tracking differentiator

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Predictive functional control (RFC) and its application in chlorinated polyethylene proc.ss

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Journal of Zhejiang University: Science 2003年第3期4卷 300-304页

作者： Li, Hong-Liang Su, Hong-Ye Liu, Jun Chu, Jian Lab. of Industrial Control Technol. Inst. of Advanced Proc. Control Hangzhou 310027 China Mat. and Chem. Eng. Inst. Zhejiang Univ. Hangzhou 310027 China

The main principle and the characteristic of Predictive Functional control (PFC) strategy are presented in this paper and the corresponding control system aid design software APC-PFC is also introduced. For a chlorinated polyethylene (CPE) proc.ss, a design scheme of cascade predictive functional control system is described and the control performance is improved obviously.

关键词： Predictive control systems

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Improved Speaker Recognition over VoIP using Auditory Features

Improved Speaker Recognition over VoIP using Auditory Featur...

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ACS/IEEE International Conference on Computer Systems and Applications

作者： Zergat Kawthar Yasmine Selouani Sid Ahmed Amrouche Abderrahmane Debyeche Mohamed LCPTS Faculty of Electronics and computer Sciences Speech Com. & Signal Proc. Lab.- Algiers Algeria Department of Information Management University of Moncton Shippagan Canada

This work presents a novel framework based on a discriminative auditory feature extractor for speaker recognition over VoIP network. The auditory model that simulates the mid-external and inner ear is incorporated into the conventional Mel Frequency Cepstral Coefficients (MFCC) scheme to produce new parameters that we named Ear Frequency Cepstral Coefficients (EFCCs). The experiments are conducted on the TIMIT corpus and the EFCC, used as input parameters tothe i-vector algorithm. Results showed interesting performances compared to the conventional MFCC parameters. In addition, this improvement was obtained by using fewer parameters (43 EFCCs vs 60 MFCCs) in our experiment.

关键词： Feature extraction Speech recognition Filter banks Ear Speaker recognition Mel frequency cepstral coefficient

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Feature Selection Applied to G.729 Synthesized Speech for Automatic Speaker Recognition 5

Feature Selection Applied to G.729 Synthesized Speech for Au...

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5th International Congress on Information Science and Technology, CiSt 2018

作者： Zergat, K.Y. Selouani, S.A. Amrouche, A. USTHB Bab Ezzouar Speech Com. and Signal Proc. Lab.-LCPTS Faculty of Electronics and Computer Sciences Algiers16111 Algeria Department of Information Management Compus of Shippagan University of Moncton 218boulevard J.-D.-Gautier ShippaganNBE8S 1P6 Canada

ISBN: (纸本)9781538643853

Performance of Automatic Speaker Recognition (ASR) over wireless communications knows a clear degradation due to the effect of the synthesized speech. In order to enhance the performance accuracy, we propose to apply a feature selection using Linear Discriminant Analysis (LDA) in the front end part of the ASR system. For simulation the G.729 codec is used. The speaker and session dependent i-vector distribution is modeled using a Gaussian probabilistic LDA (GPLDA). The obtained results, carried out by using the TIMIT corpus and MFCCs input parameters demonstrate that the LDA technique mainly dismissed the MFCC's derivatives, which enhances the recognition accuracy in both clean and synthesized speech. © 2018 IEEE.

关键词： Probability distributions

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State-of-the-art techniques for internal quality measurements in steel sheet production proc.sses

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Kawasaki Steel Technical Report 2000年第43期 87-92页

作者： Takada, Hajime Miyake, Toshihide Yokota, Hiroyuki Mech. Proc. Instrum. Contr. Lab. Technical Res. Labs. Plant Control Technology Sec. Plant Control Technology Dept. Mizushima Works Plant Control Technology Sec. Plant Control Technology Dept. Chiba Works

This paper describes the state-of-the-art ultrasonic and magnetic measuring techniques developed at Kawasaki Steel and used in the production proc.ss of steel sheets. Some examples shown here are as follows: (1) Magnetic flux leakage testing system for the detection of nonmetallic inclusions, (2) Nondestructive orientation measurement for secondary re-crystallized grains in grain-oriented electrical steel by ultrasonic interferometry, (3) Immersion testing method for the detection of nonmetallic inclusion, and (4) Surface wave probe for the detection of surface flaws in rolls used in rolling mills. The development of these techniques and their applications to actual steel sheets production proc.sses have contributed to advances in quality assurance and control. By means of these techniques, steel sheet products with advanced and uniform properties are being continuously produced to meet customers' needs.

关键词： Steel sheet

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Ultra-thin hot rolled strip

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Kawasaki Steel Technical Report 2000年第42期 1-7页

作者： Yamada, Nobuo Kitahama, Masanori Nikaido, Hideyuki Sheet Control Sec. Technical Control Dept. Chiba Works Mech. Proc. Instrum. Contr. Lab. Technical Res. Labs. Hot Rolling Technology Sec. Hot Rolling Dept. Equipment Technology Sec.

Kawasaki Steel has been making efforts to develop new hot-rolled steel products by using fully continuous rolling technology, so-called `endless rolling', at No. 3 hot strip mill of Chiba Works. Stable rolling technology of ultra-thin hot rolled strips such as 1.0 mm, 0.9 mm, and 0.8 mm in thickness has been established, and the conventional minimum gauge of hot rolled strips (1.2 mm) has been lowered. The ultra-thin hot rolled strips have been provided to the market with a brand name `RTHC' (River thin hot coil commercial grade) since 1977. The ultra-thin hot rolled strips have excellent quality in dimensional accuracy and mechanical properties. In addition, the ultra-thin hot rolled strips meet current needs of energy saving and reducing CO2 emission. New market and more demands for the newly developed product strips are expected.

关键词： Iron and steel plants

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High quality production technology at the Chiba Works no. 3 hot strip mill

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Kawasaki Steel Technical Report 1997年第37期 59-64页

作者： Imae, Toshio Nomura, Nobuaki Miyoshi, Sadayuki Mech. Proc. Instrum. and Contr. Lab. Technical Res. Labs. Japan Hot Rolling Technology Sec. Hot Rolling Dept. Chiba Works Japan Plant Control Technology Sec. Plant Control Technology Dept. Chiba Works Japan

Kawasaki Steel started the operation of the No. 3 hot strip mill at its Chiba Works in May 1995. This is the first fully continuous hot strip mill in the world. To satisfy customer demands for the improvement of product qualities, the mill has the following features: (1) A high skid button was installed in reheating furnace to remove skid marks. (2) High speed proc.ssing, hydraulic edgers and long side guides were introduced in rougher mill. (3) A pair cross mill, a hydraulic screw down, an AC motor-drive and a low inertia looper were installed in finisher mill. (4) Subdivided control valves were installed in water cooling zone. These arrangements are controlled precisely and thus, improved product accuracy in strip gauge, crown and width and the quality of the material.

关键词： Strip mills

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