检索结果-内蒙古大学图书馆

Multi-model approach to nonlinear system identification with unknown time delay

IFAC Proceedings Volumes 2014年第3期47卷 9388-9393页

作者： Lei Chen Biao Huang Fei Liu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 P.R. China Department of Chemical and Materials Engineering University of Alberta Edmonton AB T6G 2G6 Canada

This paper is concerned with identification of nonlinear systems with a noisy scheduling variable, and the measurement of the system has an unknown time delay. Auto regressive exogenous (ARX) models are selected as the local models, and multiple local models are identified along the process operating points. The dynamics of a nonlinear system are represented by associating a normalized exponential function with each of the ARX models; therein, the normalized exponential function is acted as the probability density function. The parameters of the ARX models and the exponential functions as well as the unknown time delay are estimated simultaneously under the expectation maximization (EM) algorithm using the retarded input-output data. A CSTR example is given to verify the proposed identification approach.

关键词： Nonlinear system identification Expectation maximization algorithm Multiple models Time delay

来源：评论

学校读者我要写书评

暂无评论

Sufficient and Necessary Condition of Admissibility for Fractional-order Singular System

引用

自动化学报 2013年第12期39卷 2160-2164页

作者： YU Yao JIAO Zhuang SUN Chang-Yin School of Automation Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing 100083 China Beijing Institute of Elec- tronic System Engineering Beijing 100854 China

这份报纸与顺序为部分顺序的单个系统集中于考虑条件吗？(0， 1 ) 。整齐的定义，没有推动并且考虑被给第一，然后，为部分顺序的单个系统的考虑的一个足够、必要的条件被建立。一个数字例子被包括说明建议条件。

关键词：奇异系统分数阶充要条件可容许充分必要条件

来源：评论

学校读者我要写书评

暂无评论

A New Pricing Scheme for controlling Energy Storage Devices in Smart Grid

A New Pricing Scheme for Controlling Energy Storage Devices ...

引用

American control Conference

作者： Jingwei Zhu Michael Z. Q. Chen Zhiqiang Zuo Baozhu Du Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign Champaign IL 61820 USA. Department of Mechanical Engineering The University of Hong Kong Hong Kong and HKU Shenzhen Institute of Research and Innovation Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 P.R.China. School of Automation Nanjing University of Science and Technology Nanjing P.R.China.

ISBN: (纸本)9781479932757

Improvement of the overall efficiency of energy infrastructure is one of the main anticipated benefits of the deployment of smart grid technology. Advancement in energy storage technology and two-way communication in the electric network are indispensable components to achieve such a vision, while efficient pricing schemes and appropriate storage management are also essential. In this paper, we propose a novel pricing scheme which permits one to indirectly control the energy storage devices in the grid to achieve a more desirable aggregate demand profile that meets a particular target of the grid operator such as energy generation cost minimization and carbon emission reduction. Such a pricing scheme can potentially be applied to control the behavior of energy storage devices installed for integration of intermittent renewable energy sources that have permission to grid connection and will have broader applications as an increasing number of novel and low-cost energy storage technologies emerge.

关键词： Pricing Scheme controlling Energy Storage Devices Smart Grid Smart grids Energy storage devices Pricing Renewable energy renewable energy sources bidirection communication Store management

来源：评论

学校读者我要写书评

暂无评论

A robust real-time tracking method of fast video object based on gaussian kernel and random projection

A robust real-time tracking method of fast video object base...

引用

4th International Conference on Intelligence Science and Big Data engineering, IScIDE 2013

作者： Feng, Yajuan Wang, Lina Qin, Shiyin School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing Aerospace Automatic Control Institute Beijing 100854 China

ISBN: (纸本)9783642420566

It is a challenging topic how to achieve the real-time tracking of fast video object under complex environment. In this paper, a scheme and its corresponding implementing algorithms of real-time tracking of fast video object are designed and perfected, which are characterized with high performances of real-time tracking and robustness. At first, a kind of scheme is designed for the real-time tracking of fast video object and corresponding implementing strategies for some key modules are proposed. Then the particle filter is employed to predict the pose state of fast video object and the motion object is discriminated from its background by Gaussian kernel and random projection. Moreover, an adaptive feature selection method is used to enhance the robustness and tracking efficiency. A series of experiment results demonstrate that the scheme and algorithms proposed in this paper outperform the current existing algorithms in the tracking efficiency, accuracy and robustness. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Efficiency

来源：评论

学校读者我要写书评

暂无评论

Multi-Parametric Toolbox 3.0

Multi-Parametric Toolbox 3.0

引用

European control Conference (ECC)

作者： Martin Herceg Michal Kvasnica Colin N. Jones Manfred Morari ETH Zurich Automatic Control Laboratory Switzerland Automation and Mathematics Institute of Information Engineering Slovakia EPF Lausanne Automatic Control Laboratory Switzerland

The Multi-Parametric Toolbox is a collection of algorithms for modeling, control, analysis, and deployment of constrained optimal controllers developed under Matlab. It features a powerful geometric library that extends the application of the toolbox beyond optimal control to various problems arising in computational geometry. The new version 3.0 is a complete rewrite of the original toolbox with a more flexible structure that offers faster integration of new algorithms. The numerical side of the toolbox has been improved by adding interfaces to state of the art solvers and by incorporation of a new parametric solver that relies on solving linear-complementarity problems. The toolbox provides algorithms for design and implementation of real-time model predictive controllers that have been extensively tested.

关键词： Libraries Optimization Computational geometry Silicon Computational modeling MATLAB Engines

来源：评论

学校读者我要写书评

暂无评论

Setpoints Compensation in Industrial processes via Multirate Output Feedback control

Setpoints Compensation in Industrial Processes via Multirate...

引用

9th Asian control Conference (ASCC)

作者： Yin, Shen Liu, Fangzhou Gao, Huijun Qiu, Jianbin Chai, Tianyou Fan, Jialu Karimi, Hamid Reza Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150080 China State Key Laboratory for Synthetical Automation of Process Industries Northeastern University Shenyang 110004 China Department of Engineering University of Agder Grimstad N-4898 Norway

ISBN: (纸本)9781467357692;9781467357678

This paper investigates the setpoints compensation for a class of complex industrial processes. Plants at the device layer are controlled by the local regulation controllers, and a multirate output feedback control approach for setpoint compensation is proposed such that the subsystems can reach the dynamically changed setpoints and the given economic objective can also be tracked via certain economic performance index (EPI). First, a sampled-data multivariable direct output feedback proportional integral (PI) controller is designed to regulate the performance of the subsystems. Second, the outputs and control inputs of the plants at the device layer are sampled at operation layer sampling time to form an EPI. Thus the multirate problem is solved by a lifting method. Third, static setpoints are generated by real time optimization (RTO) and the dynamic setpoints are calculated by the compensator according to the error between the EPI and objective at each operation layer step. Finally, a rougher flotation process model is employed to demonstrate the effectiveness of the proposed method.

关键词： PI control compensation complex networks control system synthesis feedback multivariable control systems optimisation process control sampled data systems

来源：评论

学校读者我要写书评

暂无评论

Outlier Analysis in Set-based Estimation for Nonlinear Systems Using Convex Relaxations

Outlier Analysis in Set-based Estimation for Nonlinear Syste...

引用

European control Conference

作者： Stefan Streif Matthias Karl Rolf Findeisen Laboratory for Systems Theory and Automatic Control Institute for Automation Engineering Otto-von-Guericke-University Magdeburg

ISBN: (纸本)9781479901890

Set-based estimation for nonlinear systems is a useful tool to handle sparse and uncertain data. The tool provides outer bounds on feasible parameter sets and reachable states, as well as provable inconsistency certificates for entire parameter regions. In case of errors in the data such as outliers or incorrect a priori assumptions on variable uncertainties, set-based approaches can, however, lead to poor estimates or even rejection of a consistent model. We present a set-based approach to systematically identify outliers or incorrect variable uncertainty assumptions. The basic idea is to detect outliers by quantifying the influence they have on the inconsistency of an underlying feasibility problem. The results build on a set-based estimation framework that employs convex relaxations. Specifically we derive model consistency measures and sensitivity measures that combine the sensitivity information stored in the Lagrange dual variables. An algorithm is developed that iteratively detects outliers that contribute most to inconsistency. The algorithm terminates once the data and model are no longer proved inconsistent. The approach is illustrated by an example.

关键词： Mathematical model Uncertainty Sensitivity Measurement uncertainty Estimation Data models Analytical models

来源：评论

学校读者我要写书评

暂无评论

Guaranteed Diagnosability of Parametric Faults in Nonlinear Systems

Guaranteed Diagnosability of Parametric Faults in Nonlinear ...

引用

IEEE Annual Conference on Decision and control

作者： Daniel Hast Stefan Streif Rolf Findeisen Laboratory for Systems Theory and Automatic Control Institute of Automation Engineering Otto-von-Guericke-University Magdeburg Germany

ISBN: (纸本)9781467357159

In this work we focus on unique diagnosability of parametric faults in the presence of measurement uncertainty and model mismatches. Specifically, we formulate a condition for diagnosability of parametric faults in a set-based framework that allows for direct consideration of uncertainty. Based on this condition we present an approach for the analysis and certification of diagnosability. Furthermore, we propose an approach for the redesign of initially given fault classifications in the parameter space. Specifically we compute diagnosable subsets of initially given parameter sets in polynomial discrete-time fault candidates by comparing pairs of fault candidates. Furthermore, we demonstrate the presented approach for a numerical example.

关键词： Parametric fault Parametric measurement uncertainty Redesign parameter space methods numerical example certification Fault class

来源：评论

学校读者我要写书评

暂无评论

O-glycan profiling of serum glycan for potential renal cancer biomarkers

引用

Science China(Life Sciences) 2013年第8期56卷 739-744页

作者： GAO Yi MA Fei ZHANG Wei ZHONG Fan TANG HaiLin XU DanFeng ZHAO Liang Department of Urology Changzheng Hospital of Second Military Medical University State Key Laboratory of Proteomics Beijing Proteome Research CenterBeijing Institute of Radiation Medicine Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and Technology Department of Automatic Control College of Mechatronics and AutomationNational University of Defense Technology Laboratory of Systems Biology Institutes of Biomedical SciencesFudan University

Serum was obtained from 25 male renal cell carcinoma(RCC) patients and 21 healthy males.O-glycans were released by a-elimination reaction and purified by graphitized carbon cartridge solid phase extraction,then profiled by matrix-assisted laser desorption/ionisation-time of flight mass *** noise removal and peak alignment,1372 peaks were extracted from 200000 data *** peaks were analyzed by calculation of differential sensitivity and *** combination of two feature peaks was chosen as a biomarker and could clearly differentiate RCC and normal samples in our study group.

关键词： mass spectrometry glycan renal cell carcinoma biomarkers

来源：评论

学校读者我要写书评

暂无评论

Design of Active Inputs for Set-Based Fault Diagnosis

Design of Active Inputs for Set-Based Fault Diagnosis

引用

American control Conference

作者： Joseph K. Scott Rolf Findeisen Richard D. Braatz Davide M. Raimondo Massachusetts Institute of Technology Institute for Automation Engineering Laboratory for Systems Theory and Automatic Control Otto-von-Guericke University Magdeburg Identification and Control of Dynamic Systems Laboratory University of Pavia

ISBN: (纸本)9781479901777

Effective fault diagnosis depends on the detectability of the faults in the measurements, which can be improved by a suitable input signal. This article presents a deterministic method for computing the set of inputs that guarantee fault diagnosis, referred to as separating inputs. The process of interest is described, under nominal and various faulty conditions, by linear discrete-time models subject to bounded process and measurement noise. It is shown that the set of separating inputs can be efficiently computed in terms of the complement of one or several zonotopes, depending on the number of fault models. In practice, it is essential to choose elements from this set that are minimally harmful with respect to other control objectives. It is shown that this can be done efficiently through the solution of a mixed-integer quadratic program. The method is demonstrated for a numerical example.

关键词： Set-Based Fault Diagnosis measurements guarantee fault diagnosis

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：