检索结果-内蒙古大学图书馆

SEAISI Quarterly (South East Asia Iron and Steel Institute) 2012年第3期41卷 59-63页

作者： Koizumi, Shigeto Kobayashi, Masanori Morimoto, Yoshio Murakami, Akira Sano, Kenichi Process Engineering Development Section Kakogawa Works KOBE STEEL Ltd. Kakogawa Japan Control Technology Research Section Technical Development Group KOBE STEEL Ltd. Kobe Japan Cold Rolling Division Kakogawa Works KOBE STEEL Ltd. Kakogawa Japan

The combined pickling and tandem cold mill (PTCM) is the main cold rolling plant of Kakogawa Works. Because gauge accuracy is one of the most important subjects, the multi valuable automatic gauge control system (MV-AGC) has been installed. As MV-AGC is a very effective system to keep gauge accuracy in longitudinal direction of the coil, the more the applied ratio of MV-AGC is, the shorter the off gauge length is. For applying MV-AGC widely, the tension reference pattern, that is the target value of the tension of MV-AGC at acceleration and deceleration stage, is optimized by numerical method. Through the actual operation, it is shown that applying the MV-AGC with the proper tension reference pattern has reduced the gauge deviation and the off gauge length at head to tail of the cold rolled strip.

关键词： Gages

来源：评论

学校读者我要写书评

暂无评论

Takagi-Sugeno control of the Elevation Channel of A Twin-Rotor System Using Closed-Loop Empirical Data

Takagi-Sugeno Control of the Elevation Channel of A Twin-Rot...

引用

American control Conference

作者： Hamidreza Azimian Alireza Fatehi Babak N. Araabi Department of Mechanical and Materials Engineering The University of Western Ontario (UWO) London ON Canada Advanced Process Automation and Control (APAC) Research Group Industrial Control Center of Excellence Faculty of Electrical and Computer engineering K. N. Toosi University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781457710957

In this paper, design of Takagi-Sugeno controllers for a twin-rotor system from empirical data is addressed. First, identification of linear models using Prediction Error Method in the presence of nonlinear distortions and in feedback systems is revisited, and it is demonstrated that feedback nonlinear systems with an integral action can be locally represented by linear models rather than affine models. Moreover, it is demonstrated that how the consistency and unbiasedness of the identified models can be improved by proper design of the experiments. In order to ensure that the unmodeled contributions in the resulting piecewise linear model are sufficiently small, a criterion is proposed based on the small-gain theorem that can be used for unfalsification of the piecewise linear model. Finally, by taking advantage of the separation principle, design of fuzzy Takag-Sugeno state feedback and observer is formulated in terms of Linear Matrix Inequalities (LMIs). The implementation results on the actual system demonstrate significant improvements with respect to the initial controller and previous work on similar systems.

关键词： Nonlinear systems Closed loop systems Observers Uncertainty Data models Predictive models

来源：评论

学校读者我要写书评

暂无评论

Tuning of Dynamic Matrix controller for FOPDT Models Using Analysis of Variance

引用

IFAC Proceedings Volumes 2011年第1期44卷 12319-12324页

作者： Peyman Bagheri Ali Khaki-Sedigh Advanced Process Automation & Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran

Abstract Dynamic Matrix control (DMC) is well known in the MPC family and has been implemented in many industrial processes. In all the MPC methods, tuning of controller parameters is a key step in successful control system performance. An analytical tuning expression for DMC is derived using the analysis of variance (ANOVA) methodology and nonlinear regression. It is assumed that the plants under consideration can be modeled by a First Order plus Dead Time (FOPDT) linear model. This facilitates the derivation of a closed form formulae for the tuning procedure. The proposed method is tested via simulations and experimental work. The plant chosen for practical implementation of the proposed tuning strategy is a nonlinear laboratory scale pH plant. Also, comparison results are provided to show the effectiveness of this method.

关键词： Dynamic Matrix control Analysis of Variance Nonlinear Regression Tuning industrial processes pH process

来源：评论

学校读者我要写书评

暂无评论

Multiple Model Predictive control of Multivariable pH process Using Adaptive Weighting Matrices

引用

IFAC Proceedings Volumes 2011年第1期44卷 12366-12371页

作者： Peyman Bagheri Vahid Mardanlou Alireza Fatehi Advanced Process Automation & Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran

Abstract Extreme nonlinearity and exhibition of severe interaction effects of multivariable pH processes makes it an appropriate test bed for evaluation of advanced controllers. This paper studies different multiple model methods for Generalized Predictive control using Independent Model approach (GPCI) with adaptive weighting matrices. New method for adaptive determination of weighting matrices, proposed in this paper. Simulation results via typical multivariable pH process demonstrate the effectiveness and validity of the method. Different multiple model methods using adaptive weighting matrices compared with each other.

关键词： Generalized Predictive control Weighting Matrices pH processes Multivariable control Multiple Model Independent Model

来源：评论

学校读者我要写书评

暂无评论

Novel Tuning Strategy for Two-Degree-of-Freedom PI controllers

引用

IFAC Proceedings Volumes 2011年第1期44卷 6757-6762页

作者： Peyman Bagheri Hossein Nemati Advanced Process Automation & Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran Department of Electrical Engineering Sistan and Baluchestan University Iran

Abstract In this paper, a new tuning procedure for PI controllers in Two-Degree-of-Freedom (2DOF) structure is proposed. In design procedure, First Order plus Dead Time (FOPDT) model is used. The aim is to have good set point tracking and disturbance rejection and also maximum robustness to model uncertainties. The tuning strategy is based on using analytical rules and some conceptual rules about closed loop poles and also an exhaustive search. Simulation results demonstrate the effectiveness and validity of proposed method in coping with conflicting design objectives for a wide variety of processes including minimum phase and non-minimum phase and also integrating processes.

关键词： 2DOF PI controller FOPDT model Optimization Robustness

来源：评论

学校读者我要写书评

暂无评论

Design intent utilization for lithography compliance check and layout refinement to improve manufacturability

Design intent utilization for lithography compliance check a...

引用

IEEE International Symposium on Semiconductor Manufacturing

作者： Sachiko Kobayashi Atsuhiko Ikeuchi Kazunari Kimura Toshiya Kotani Satoshi Tanaka Suigen Kyoh Shimon Maeda Soichi Inoue Advanced Lithography Process Technology Department Device Process Development Center Corporate Research & Development Center Toshiba Corporation Japan Design Methodology Development Group Design Technology Development Department Analog & Imaging Ic Division Toshiba Corporation Semiconductor Company Japan

A collection of slides from the authors conference presentation about the design intent utilization for lithography compliance check and layout refinement to improve manufacturability is presented.

关键词： Lithography Timing Data mining Loss measurement Wires Design methodology

来源：评论

学校读者我要写书评

暂无评论

Robust porous SiOCH (k=2.5) for 28nm and beyond technology node

Robust porous SiOCH (k=2.5) for 28nm and beyond technology n...

引用

IEEE International Conference on Interconnect Technology

作者： Janghee Lee Sang Hoon Ahn Insun Jung Kyu-Hee Han Gyeonghee Kim Sang-Don Nam Woo Sung Jeon Byeong Hee Kim Gil Heyun Choi Siyoung Choi Ho-Kyu Kang Chilhee Chung Process Development Team Semiconductor Research and Development Center Samsung Electronics Company Limited Hwasung Gyeonggi South Korea AE Center Analytical Engineering Group Samsung Advanced Institute of Technology Yongin si Gyeonggi South Korea

Robust p-SiOCH was deposited in a PECVD reactor using Si precursor with Si-C-C-Si bond structure. It achieved its elastic modulus of 8.4GPa at k=2.55, comparable to the reference silica-based p-SiOCH that has been widely evaluated among the major chipmakers. However, its post-integration k increase was ~0.1 on a 100nm-pitched single damascene line and negligible on a 90nm-pitched trench first metal hardmask dual damascene line. Its superb performance in plasma damage resistance without the sacrifice in its mechanical strength can be attributed to the presence of bridged carbon(s) between Si atoms in addition to the methyl functional group. According to 29 Si and 13 C nuclear magnetic resonance (NMR) spectra, bridged carbon and carbon in the methyl group exist approximately in 1:1 ratio in the robust p-SiOCH.

关键词： Robustness Carbon Plasmas Nuclear magnetic resonance Silicon Atomic measurements Resistance

来源：评论

学校读者我要写书评

暂无评论

Damage detection of composite structures by life-cycle strain mapping using FBG sensors

Damage detection of composite structures by life-cycle strai...

引用

SAMPE Tech 2011 Conference and Exhibition: Developing Scalable Materials and processes for Our Future

作者： Takahashi, Ichiya Sekine, Kazushi Kume, Masami Takeya, Hajime Iwahori, Yutaka Shu, Minakuchi Takeda, Nobuo Enomoto, Kiyoshi Advanced Technology R and D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-Hommachi Amagasaki Hyogo 661-8661 Japan Advanced Composite Group Aerospace Research and Development Japan Aerospace Exploration Agency 6-13-1 Osawa Mitaka Tokyo 181-0015 Japan Graduate School of Frontier Sciences University of Tokyo 5-1-5 Kashiwanoha Kashiwa Chiba 277-8561 Japan Materials Process Technology Center 3-5-8 Shibakoen Minato-ku Tokyo 105-0011 Japan

ISBN: (纸本)9781934551103

We propose structural health monitoring (SHM) technology based on the strain mapping of composite airframe structures through their life cycles including the stages of molding, machining, assembling, operation and maintenance. Our SHM system detects damages and deformation harmful to the structures by strain mapping using fiber Bragg grating (FBG) sensors. FBG sensors are suitable for life-cycle strain monitoring because reflection spectra of FBG sensors correspond to the strain applied to FBGs, which enables us to measure the strain change since the sensors were installed in structures. In this report, we conducted strain monitoring test of skin-stringer panel specimens with debondings which had different sizes and were inserted in different locations of specimens. It was confirmed that strain distribution varied with debonding size and inserted locations. In addition, we conducted strain monitoring test of open-hole CFRP panel under cyclic loading. We observed damages around the open holes of the specimen with pulse thermography. As a result, strain changed according to the initiation and propagation of delaminations. These two results demonstrate that FBG sensors can detect stringer debondings and delaminations at bolt holes which arise in composite airframe structures due to operational load in flight.

关键词： Debonding

来源：评论

学校读者我要写书评

暂无评论

Coupling Dynamic Model of Chatter for Cold Rolling

引用

Journal of Iron and Steel research International 2010年第12期17卷 30-34页

作者： YANG Xu TONG Chao-nan YUE Guang-feng MENG Jian-ji School of Information Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology- Beijing Beijing 100083 China Central Research Institute of Building and Construction Co Ltd MCC Group Beijing 100088 China

In order to build high accuracy integral dynamic models of cold rolling mill system, by analyzing the vibration process of cold rolling, the dynamic model of 4-h mill, including the rolling process model, the mill roll stand structure model and the hydraulic servo system model is built. These three models are coupled and linearized, then the multiple input and multiple output （MIMO） linear transfer function model of single stand 4-h cold mill system is obtained. The model with the proposed data proves its validity, meanwhile the effects of different working conditions on the stability of cold rolling mill system have been discussed. Simulation resulsts show that the model accords with former models and has its own advancement. It contributes to the further study and supression of coupling vibraiton.

关键词： cold rolling chatter dynamic modeling coupling simulation

来源：评论

学校读者我要写书评

暂无评论

应用小波的PV振荡周期多分辨率检测

引用

应用科学学报 2010年第1期28卷 60-64页

作者：徐占洋 Charles ZHAN 张顺颐南京邮电大学江苏省信息网络研究中心南京信息工程大学计算机与软件学院 Advanced Process Control Research and Development Group Honeywell Process SolutionsPhoenixAZ85027USA

该文提出了一种新的使用小波技术检测PV数据信号振荡周期的方法.首先使用小波技术对PV数据进行降噪;然后在不同分辨率上,应用冗余二进制离散小波变换(DDWT)来分解PV振荡信号,并检测该信号的小波系数极值,重构PV信号,避免降噪后的PV信号... 详细信息

该文提出了一种新的使用小波技术检测PV数据信号振荡周期的方法.首先使用小波技术对PV数据进行降噪;然后在不同分辨率上,应用冗余二进制离散小波变换(DDWT)来分解PV振荡信号,并检测该信号的小波系数极值,重构PV信号,避免降噪后的PV信号失真;最后基于本文提出的新算法,计算获得PV振荡信号的周期.

关键词：周期检测 PV振荡信号二进制离散小波变换小波系数极值

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：