检索结果-内蒙古大学图书馆

Identification of FIR Systems with Quantized Inputs and Observations

IFAC-PapersOnLine 2015年第28期48卷 674-679页

作者： Guo, Jin Wang, Le Yi Yin, George Zhao, Yanlong Zhang, Ji-Feng School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China Department of Electrical and Computer Engineering Wayne State University DetroitMI48202 United States Department of Mathematics Wayne State University DetroitMI48202 United States Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China

This paper introduces identification algorithms for finite impulse response systems under quantized output observations and general quantized inputs. While asymptotically efficient algorithms for quantized identification under periodic inputs are available, their counterpart under general inputs has encountered technical difficulties and evaded satisfactory resolutions. Under quantized inputs, this paper resolves this issue with constructive solutions. A two-step algorithm is developed, which demonstrates desired convergence properties including strong convergence, mean-square convergence, convergence rates, asymptotic normality, and asymptotical efficiency in terms of the Cramér-Rao lower bound. Some essential conditions on input excitation are derived that ensure identifiability and convergence. It is shown that by a suitable selection of the algorithm's weighting matrix, the estimates become asymptotically efficient. The strong and mean-square convergence rates are explicitly obtained. Optimal input design is discussed. Numerical examples are included to illustrate the main results of this paper © 2015

关键词： FIR filters Efficiency Identification (control systems) Impulse response Asymptotic efficiency Asymptotically efficient Finite impulse response system Identification algorithms Input design Mean square convergences non periodic input quantization

来源：评论

学校读者我要写书评

暂无评论

controller Verification and Parametrization Subject to Quantitative and Qualitative Requirements

引用

IFAC-PapersOnLine 2015年第8期48卷 1174-1179页

作者： Petar Andonov Anton Savchenko Philipp Rumschinski Stefan Streif Rolf Findeisen Laboratory for Systems Theory and Automatic Control Otto-von-Guericke University Magdeburg Germany Department of Computer Science and Automation Technical University of Ilmenau Ilmenau Germany

Verifying if a process controller achieves a desired goal regarding safety specifications or performance is an important task in practice. This work presents a method for controller verification and parametrization of uncertain polynomial discrete-time systems with closed-loop requirements. Apart from quantitative constraints, also qualitative requirements, which are not directly linked to a specific time or amplitude, are considered. For formalizing these constraints, we employ linear temporal logic formulas and polynomial inequalities. Uncertainties can be considered in the input, the output, the initial conditions and the model parameters to account e.g. for model plant mismatch and noise, described as unknown-but-bounded variables. We combine the requirements and the system dynamics into a nonlinear feasibility problem to verify the controller and determine admissible controller parametrization. This problem is solved by relaxing it to a mixed-integer linear program. The relaxation procedure guarantees that the derived set of possible parametrization fulfill the quantitative and qualitative requirements of the closed-loop behavior despite the present uncertainties. The proposed method is illustrated by verifying and parametrizing a controller for a two tank system.

关键词： set-based method controller tuning inner approximation uncertain systems qualitative and quantitative requirements

来源：评论

学校读者我要写书评

暂无评论

A Two-Layer Transformation for Characterizing the Zeros of a Network Input-Output Dynamics

A Two-Layer Transformation for Characterizing the Zeros of a...

引用

IEEE Annual Conference on Decision and control

作者： Jackeline Abad Torres Sandip Roy Department of Control and Industrial Automation at Escuela Politecnica Nacional School of Electrical Engineering and Computer Science at Washington State University

ISBN: (纸本)9781479978878

Many networks can be modeled as collections of subsystems with complex internal dynamics, which are dynamically coupled according to a weighted digraph. This article characterizes the input-output behavior of a network of coupled homogeneous single-input single-output subsystems, in the case where external actuation and measurement are each applied at a single (but possibly different) component. Precisely, a two-layer transformation of the network's dynamics is undertaken, which makes explicit the roles of 1) the local subsystem model, 2) the network's global interconnections (graph), and 3) the input and output locations, in determining the zeros of the input-output model. The analysis of the zeros via this special-coordinate-basis decomposition shows a parallel with the spectral analysis of the coupled-subsystem model, and directly gives insight into the network's input-output dynamics and its feedback control.

关键词： INPUT-OUTPUT Zero SUB-SYSTEM Network dynamics feedback control Spectrum Analysis

来源：评论

学校读者我要写书评

暂无评论

Dominant Eigenvalue Minimization with Trace Preserving Diagonal Perturbation: Subset Design Problem

Dominant Eigenvalue Minimization with Trace Preserving Diago...

引用

IEEE Annual Conference on Decision and control

ISBN: (纸本)9781479978878

We study the problem of minimizing the dominant eigenvalue of an essentially-nonnegative matrix with respect to a trace-preserving or fixed-trace diagonal perturbation, in the case where only a subset of the diagonal entries can be perturbed. The spectrum of the perturbed matrix at the optimum is characterized. A constructive algorithm for computing the optimal diagonal trace-preserving perturbation is developed, using the spectral result together with line-sum-symmetrization arguments. A number of graph-theoretic results are developed on the optimal perturbation and how it changes if further entries are contrained, in part using properties of the Perron complement of nonnegative matrices.

关键词： Eigenvalues and eigenfunctions Symmetric matrices Mathematical model Optimization Algorithm design and analysis Topology Sensitivity

来源：评论

学校读者我要写书评

暂无评论

Results of a real world trial with a mobile social service robot for older adults 16

Results of a real world trial with a mobile social service r...

引用

ACM/IEEE International Conference on Human-Robot Interaction (HRI)

作者： Jürgen Pripfl Tobias Körtner Daliah Batko-Klein Denise Hebesberger Markus Weninger Christoph Gisinger Susanne Frennert Hakan Eftring Margarita Antona Ilia Adami Astrid Weiss Markus Bajones Markus Vincze Akademie für Altersforschung am Haus der Barmherzigkeit Vienna Austria Zentrum für Geriatrische Medizin und Geriatrische Pflege Donau Universität Krems Krems Austria Department of Design Sciences Lund University Lund Sweden Institute of Computer Science (ICS) Foundation for Research and Technology - Hellas (FORTH) Heraklion Greece Automation and Control Institute (ACIN) Vienna University of Technology Vienna Austria

ISBN: (纸本)9781467383707

Robots are an increasingly discussed solution for assistance of seniors. Importance of testing natural interaction therefore becomes crucial. This paper presents first results of a study with an autonomous mobile social service robot prototype that was deployed in 18 private households of senior adults aged 75 years and older for a total of 371 days. Findings show that utility met the users' expectations. However, the robot was rather seen as a toy instead of being supportive for independent living. Furthermore, despite of an emergency function of the robot, perceived safety did not increase. Reasons for this might be the good health conditions of our users, a lack of technological robustness and slow performance of the prototype. However, users believed that a market ready version of the robot would be vital for supporting people who are more fragile and more socially isolated.

关键词： Prototypes Safety Service robots Mobile communication Usability Aging

来源：评论

学校读者我要写书评

暂无评论

Distributed closed-loop control formation for technological line of iron ore raw materials beneficiation

引用

Metallurgical and Mining Industry 2015年第7期7卷 16-19页

作者： Morkun, Vladimir Morkun, Natalia Tron, Vitaliy Computer Science Automation and Control Systems Department Kryvyi Rih National University Ukraine Economic Cybernetics and Project Management Department Kryvyi Rih National University Ukraine

A method of distributed closed-loop control formation for the ore beneficiation technological processes within the ore-dressing factory technological line is proposed.

关键词： Concentration (process)

来源：评论

学校读者我要写书评

暂无评论

Distributed control of ore beneficiation interrelated processes under parametric uncertainty

引用

Metallurgical and Mining Industry 2015年第8期7卷 18-21页

作者： Morkun, Vladimir Morkun, Natalia Tron, Vitaliy Computer Science Automation and Control Systems department Kryvyi Rih National University Ukraine Economic Cybernetics and Project Management Department Kryvyi Rih National University Ukraine

A method of distributed control forming of ore beneficiation interrelated processes under parametric uncertainty using robust control techniques is proposed.

关键词： Concentration (process)

来源：评论

学校读者我要写书评

暂无评论

Identifiability and Parameter Estimation of Linear Continuous-time Systems under Irregular and Random Sampling

引用

IFAC-PapersOnLine 2015年第28期48卷 332-337页

作者： Mu, Biqiang Guo, Jin Wang, Le Yi Yin, George Xu, Lijian Zheng, Wei Xing Key Laboratory of Systems and Control Chinese Academy of Sciences Beijing100190 China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China Department of Electrical and Computer Engineering Wayne State University DetroitMI48202 United States Department of Mathematics Wayne State University DetroitMI48202 United States Department of Electrical and Computer Engineering Technology Farmingdale State College State University of New York FarmingdaleNY11735 United States School of Computing Engineering and Mathematics University of Western Sydney PenrithNSW2751 Australia

This paper considers the problem of identifiability and parameter estimation of single-input-single-output, linear, time-invariant, stable, continuous-time systems under irregular and random sampling schemes. Conditions for system identifiability are established under inputs of exponential polynomial types and a tight bound on sampling density. Identification algorithms of Gauss-Newton iterative types are developed to generate convergent estimate sequences. When the sampled output is corrupted by observation noises, input design, sampling times, and convergent algorithms are intertwined. Persistent excitation (PE) conditions for strongly convergent algorithms are derived. Unlike the traditional identification, the PE conditions under irregular and random sampling involve both sampling times and input values. Under the given PE conditions, iterative and recursive algorithms are developed to estimate the original continuous-time system parameters. The corresponding convergence results are obtained. Several simulation examples are displayed to verify the theoretical results. © 2015

关键词： Continuous time systems Iterative methods Lyapunov methods Nonlinear control systems Parameter estimation Sampling convergence and asymptotical normality Estimation algorithm Identifiability Irregular sampling Linear continuous time system Non linear least squares

来源：评论

学校读者我要写书评

暂无评论

Photoluminescence spectroscopy investigation of epitaxial Si/GaSb nanocrystals/Si heterostructure

引用

AIP Conference Proceedings 2017年第1期1874卷

作者： Dmitry L. Goroshko Alexander V. Shevlyagin Evgeniy A. Chusovitin Sergey A. Dotsenko Anton K. Gutakovskii M. Iinuma Y. Terai Evgeniy Yu. Subbotin Nikolay G. Galkin 1Institute of Automation and Control Processes FEB RAS 5 Radio St. 690041 Vladivostok Russia 2Far Eastern Federal University 8 Sukhanova St. 690950 Vladivostok Russia 3Rzhanov Institute of Semiconductor Physics SB RAS Lavrentieva Ave.13 Novosibirsk Russia 4Kyushu Institute of Technology Department of Computer Science and Electronics 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan

Two-layer heterostructure with GaSb nanocrystals formed by solid phase epitaxy and embedded into the silicon was investigated using low-temperature (10-140 K) photoluminescence and time-resolved photoluminescence spectroscopies. Two characteristic luminescence bands with a maximum of about 0.82 and 0.87 eV were observed. It was found that low-energy peak is associated with D1 dislocation-related luminescence in silicon. Analysis of the decay components together with temperature and power dependencies of the photoluminescence for the high-energy maximum revealed that emission is more likely originated from the combined D2 dislocation centers in silicon and radiative recombination in type–II band alignment Si/GaSb nanocrystals/Si heterostructure. A nonradiative recombination dominates in all temperature range studied.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Active fault diagnosis in sampled-data systems 9

Active fault diagnosis in sampled-data systems

引用

9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2015

作者： Niemann, Henrik Poulsen, Niels Kjølstad Department of Electrical Engineering Automation and Control Technical University of Denmark Building 326 Kgs. LyngbyDK-2800 Denmark Dept. of Applied Mathematics and Computer Science Section for Dynamical Systems Technical University of Denmark Kgs. LyngbyDK-2800 Denmark

The focus in this paper is on active fault diagnosis (AFD) in closed-loop sampleddata systems. Applying the same AFD architecture as for continuous-time systems does not directly result in the same set of closed-loop matrix transfer functions. For continuous-time systems, the LFT (linear fractional transformation) structure in the connection between the parametric faults and the matrix transfer function (also known as the fault signature matrix) applied for AFD is not directly preserved for sampled-data system. As a consequence of this, the AFD methods cannot directly be applied for sampled-data systems. Two methods are considered in this paper to handle the fault signature matrix for sampled-data systems such that standard AFD methods can be applied. The first method is based on a discretization of the system such that the LFT structure is preserved resulting in the same LFT structure in the fault signature matrix as obtained for continuous-time systems. The other method is an approximation method, where the same structure is obtained for small parametric faults. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Continuous time systems

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：