检索结果-内蒙古大学图书馆

The 2011 International Conference on key Engineering Materials and Computer Science(KEMCS 2011)

作者： Hua Li Zhicheng Xu Shuqing Wang Changzhou Institute of Mechatronic Technology National Laboratory of Industrial Control Technology Institute of Advanced Process ControlZhejiang University

Aiming at a kind of uncertainties of models in complex industry processes, a novel method for selecting robust parameters is stated in the paperBased on the analysis, parameters selecting for robust control is reduced to be an object optimization problem, and the particle swarm optimization(PSO) is used for solving the problem, and the corresponding robust parameters are obtainedSimulation results show that the robust parameters designed by this method have good robustness and satisfactory performance.

关键词： particle swarm optimization(PSO),robust control,LQR

来源：评论

学校读者我要写书评

暂无评论

On parameter identifiability of linear multivariable systems with communication access constraints

On parameter identifiability of linear multivariable systems...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Lijuan Wang Hui Zhang National Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Institute of Industrial Process Control University of Zhejiang Hangzhou Zhejiang China

The problem of on-line parameter identification was discussed for linear multivariable discrete time stochastic systems with communication access constraints. Based on the concept of parameter estimability defined with mutual information, a condition for identifiability was proved under the assumption that the time-varying parameter can be modeled as a Gauss-Markov process, and the sensors access status is described by binary-value function. Analytical analysis and simulation results show that, there is a proper communication strategy which preserving the identifiability of the system under access constraints.

关键词： Mutual information MIMO Kalman filters Stochastic systems Laboratories Simulation industrial control

来源：评论

学校读者我要写书评

暂无评论

Improving Monitoring Performance of On-Line process Based on PCA Method

Improving Monitoring Performance of On-Line Process Based on...

引用

The 22nd China control and Decision Conference(2010年中国控制与决策会议)

作者： Kunlin Zhou Gang Rong School of Mechanical and Electrical Engineering Shandong University at Weihai Weihai 264209 State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejia

Principal component analysis (PCA) is very suitable for complex process monitoring and diagnosis, but it suffers many limitations such as great calculation load, poor real-time performance and lacking of on-line monitoring. Here, this paper presents a new method for multi-variable statistical process monitoring. Based on this new method, the principal component monitoring model can be generated in the principal component subspace, and the error monitoring model can be set up in the residual subspace. The method provides a human-machine monitoring interface and related fault-diagnosis interface for integrating Principal/Error/Multi-variable. This will change the real-time data of the multi-variable into the monitoring information of an integrated process, and present them effectively to the operators. With this method, on-line monitoring system was designed for the distillation process as an example, and the effectiveness of this method was illustrated.

关键词： process monitoring PCA on-line monitoring human-machine monitoring interface

来源：评论

学校读者我要写书评

暂无评论

Study of supply chain monitoring system based on IDEF method

Study of supply chain monitoring system based on IDEF method

引用

International Conference on Logistics Systems and Intelligent Management (ICLSIM)

作者： Kunlin Zhou Gang Rong School of Mechanical and Electrical Engineering Shandong University Weihai China State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control University of Zhejiang Hangzhou China

ISBN: (纸本)9781424473311

Aiming at the business competition in the global market, how to real-timely monitor the dynamic trends of supply chain in the market has been a difficulty of supply chain management. By putting into several levels of monitoring process of the supply chain, we developed a method for the information system of supply chain monitoring on the basis of the IDEF model. With this method, one would expect to detect unexpected variations at an early stage and to give early-warnings for potential risks. The enterprises would have enough time to respond to unwanted situations, to take preventive decisions and to meet efficiently the market demands.

关键词： Supply chains Monitoring Supply chain management Production process control Logistics Procurement Environmental management Laboratories industrial control

来源：评论

学校读者我要写书评

暂无评论

Sparse representation based on projection method in online least squares support vector machines

引用

控制理论与应用（英文版） 2009年第2期7卷 163-168页

作者： Lijuan LI Hongye SU Jian CHU State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou Zhejiang 310027 China College of Automation Nanjing University of Technology Nanjing Jiangsu 210009 China

A sparse approximation algorithm based on projection is presented in this paper in order to overcome the limitation of the non-sparsity of least squares support vector machines （LS-SVM）. The new inputs are projected into the subspace spanned by previous basis vectors （BV） and those inputs whose squared distance from the subspace is higher than a threshold are added in the BV set, while others are rejected. This consequently results in the sparse approximation. In addition, a recursive approach to deleting an exiting vector in the BV set is proposed. Then the online LS-SVM, sparse approximation and BV removal are combined to produce the sparse online LS-SVM algorithm that can control the size of memory irrespective of the processed data size. The suggested algorithm is applied in the online modeling of a pH neutralizing process and the isomerization plant of a refinery, respectively. The detailed comparison of computing time and precision is also given between the suggested algorithm and the nonsparse one. The results show that the proposed algorithm greatly improves the sparsity just with little cost of precision.

关键词： Least squares support vector machines Projection Sparsity pH neutralizing process Isomerization

来源：评论

学校读者我要写书评

暂无评论

Performance assessment of run-to-run control in semiconductor manufacturing based on IMC framework

引用

International Journal of Production Research 2009年第15期47卷 4173-4199页

作者： Chen, Liang Ma, Mingda Jang, Shi-Shang Wang, David Shan-Hill Wang, Shuqing State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Hangzhou China Center for Control and Guidance Technology Harbin Institute of Technology Harbin China Department of Chemical Engineering National Tsing-Hua University Hsin-Chu Taiwan

The objective of this paper is to propose a universal methodology for performance assessment of run-to-run control in semiconductor manufacturing. The slope of the linear semiconductor process model is assumed to be known or subjected to mild plant/model mismatch. Based on an internal model control framework, analytical expressions of minimum variance performance (MVP) and best achievable performance (BAP) for a series of run-to-run control schemes are derived. In the methodology, closed-loop identification is utilised as the first step to estimate the noise dynamics via routine operating data, and numerical optimisation is employed as a second step to calculate the best achievable performance bounds of the run-to-run control loops. The validity of the methodology is justified by examples of performance assessment for EWMA control, double EWMA control and RLS-LT control, even under circumstances where the processes encounter model mismatch, metrology delay and more sophisticated noises. Several essential characteristics of run-to-run control are discovered by performance assessment, and valuable advice is offered to process engineers for improving the run-to-run control performance. Furthermore, a useful application example for online performance monitoring and optimal tuning of run-to-run controller demonstrates the advantage of the methodology.

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Kinetic model for hydroisomerization reaction of C_(8)-aromatics

引用

Frontiers of Chemical Science and Engineering 2008年第1期2卷 10-16页

作者： Ouguan XU Hongye SU Xiaoming JIN Jian CHU Zhijiang College Zhejiang University of TechnologyHangzhou 310024China National Key Laboratory of Industrial Control Technology Institute of Advanced Process ControlZhejiang UniversityHangzhou 310027China

Based on the reported reaction networks,a novel six-component hydroisomerization reaction net-work with a new lumped species including C_(8)-naphthenes and C_(8)-paraffins is proposed and a kinetic model for a commercial unit is also *** empirical catalyst deactivation function is incorporated into the model accounting for the loss in activity because of coke forma-tion on the catalyst surface during the long-term *** Runge-Kutta method is used to solve the ordinary differential equations of the *** reaction kinetic parameters are benchmarked with several sets of balanced plant data and estimated by the differential vari-able metric optimization method(BFGS).The kinetic model is validated by an industrial unit with sets of plant data under different operating conditions and simulation results show a good agreement between the model predic-tions and the plant observations.

关键词： C_(8)-aromatics hydroisomerization reaction network kinetic model catalyst deactivation function parameter estimation

来源：评论

学校读者我要写书评

暂无评论

Robust Stabilization for Linear Time-varying Uncertain Periodic Descriptor Systems

引用

自动化学报 2008年第9期34卷 1219-1220页

作者： JI Xiao-Fu YANG Ze-Bin SUN Yu-Kun SU Hong-Ye School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 P.R. China National Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou 310027 P.R. China

这个问题赶出为线性变化时间的不明确的周期的描述符系统的稳定被重游。为线性变化时间的不明确的周期的描述符系统基于柔韧的稳定性的概念，为柔韧的稳定性的一个必要、足够的条件被提出。柔韧的稳定问题也被学习，相应必要、足够的条... 详细信息

这个问题赶出为线性变化时间的不明确的周期的描述符系统的稳定被重游。为线性变化时间的不明确的周期的描述符系统基于柔韧的稳定性的概念，为柔韧的稳定性的一个必要、足够的条件被提出。柔韧的稳定问题也被学习，相应必要、足够的条件用双系统的符号被给。获得的矩阵不平等条件能被转变到与一些免费矩阵的介绍的线性矩阵不平等一，它使分析和设计过程简单、可靠。

关键词：稳定性自动化系统周期控制系统

来源：评论

学校读者我要写书评

暂无评论

process Automation Development in China

引用

IFAC Proceedings Volumes 2008年第2期41卷 10614-10616页

作者： Shuqing Wang Jian Chu Hongye Su Gang Rong Yong Gu Xiaoming Jin Quanling Zhang Lei Xie Institute of Advanced Process Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China

A short historical view of process automation in China is provided. The development of essential aspects of process automation, including Distributed control System (DCS), advanced process control (APC) and Manufacturing Execution System (MES), are discussed in detail. The contribution of local process automation companies, i.e. SUPCON, and HOLLYSYS are highlighted.

关键词： advanced process control Model Predictive control (MPC) Manufacturing Execution System(MES) Petrochemical Industry Chemical Industry Oil Refinery Industry

来源：评论

学校读者我要写书评

暂无评论

A process control Platform for Education in the Virtual Factory laboratory System

引用

IFAC Proceedings Volumes 2008年第2期41卷 9773-9778页

作者： Jishuai Wang Gang Rong Haijie Gu Qiang Wang Yiping Feng State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou 310027 P. R. China

This paper describes an experimental platform which is useful for graduate and undergraduate education in control engineering. It contains a six-tank liquid level regulation system and a pilot distillation column, which can be used as stand-alone apparatus. Some extensions of the apparatus are made to increase the function of the platform. The compositions of distillate can be estimated by adding soft sensors to the distillation column. Integrating with liquid level regulation system makes the inlet and outlet flow of the distillation column controllable which provides a realistic engineering experimental environment. It is possible to describe the impacts of unloading from upstream and charging to downstream as in process industry. The platform has been used for graduate courses such as system identification, soft sensor designing and advanced control system.

关键词：

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：