检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： Zhixin Liu Jing Han Xiaoming Hu Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy and Sciences Beijing China Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781424438716

In order to have a self-organized multi-agent system exhibit some expected collective behavior, it is necessary that some agents (called leaders) are informed about the expected behavior and able to intervene. Then a fundamental question is: how many such leaders are needed? Naturally the answer depends on the model used. In this paper the model proposed by Vicsek et al. is used for the analysis. By analyzing the system dynamics and estimating the characteristics of the initial neighbor graph, a lower bound on the ratio of leaders is provided that guarantees the expected consensus being reached almost surely.

关键词： Multiagent systems control systems Content addressable storage Biological system modeling Biological systems Marine animals Educational institutions Laboratories Mathematics Intelligent agent

来源：评论

学校读者我要写书评

暂无评论

Minimum dwell time for stability and stabilization of switched linear systems

Minimum dwell time for stability and stabilization of switch...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Wei Ni Daizhan Cheng Xiaoming Hu Laboratory of Systems and Control Academy of Mathematics and Systems Science슠Chinese Academy of Sciences Beijing China Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

In this paper, the problem of minimum dwell time for the stability and stabilization of switched linear systems is considered. First, using the method of multiple Lyapunov functions, we obtain an estimate for the minimum dwell time(MDT), which assures the exponential stability of switched linear systems. Using the stability result obtained for free system, we then investigate the problem of MDT for stabilization of switched linear control system subject to input constraints. Under certain conditions the exponential stabilization can be achieved by using controls with restricted amplitudes as long as the switching laws satisfy the MDT time requirement. An illustrative example is presented to show the validity of the results.

关键词： Switches control systems Asymptotic stability Linear systems Switched systems Lyapunov method Stability analysis

来源：评论

学校读者我要写书评

暂无评论

From infinite to finite programs: Explicit error bounds with applications to approximate dynamic programming

arXiv

引用

arXiv 2017年

作者： Esfahani, Peyman Mohajerin Sutter, Tobias Kuhn, Daniel Lygeros, John Delft Center for Systems and Control TU Delft Netherlands Automatic Control Laboratory ETH Zurich Switzerland Risk Analytics and Optimization Chair EPFL Switzerland

We consider linear programming (LP) problems in infinite dimensional spaces that are in general computationally intractable. Under suitable assumptions, we develop an approximation bridge from the infinite-dimensional LP to tractable finite convex programs in which the performance of the approximation is quantified explicitly. To this end, we adopt the recent developments in two areas of randomized optimization and first order methods, leading to a priori as well as a posteriori performance guarantees. We illustrate the generality and implications of our theoretical results in the special case of the long-run average cost and discounted cost optimal control problems for Markov decision processes on Borel spaces. The applicability of the theoretical results is demonstrated through a constrained linear quadratic optimal control problem and a fisheries management problem.90C39, 90C34, 93E20 Copyright © 2017, The Authors. All rights reserved.

关键词： Markov processes

来源：评论

学校读者我要写书评

暂无评论

Robust Fundamental Lemma for Data-driven control

arXiv

引用

arXiv 2022年

作者： Coulson, Jeremy Van Waarde, Henk Dörfler, Florian Automatic Control Laboratory Eth Zürich ZH 8006 Switzerland Systems Control and Optimization Group University of Groningen Groningen9747 AG Netherlands

The fundamental lemma by Willems and coauthors facilitates a parameterization of all trajectories of a linear time-invariant system in terms of a single, measured one. This result plays an important role in data-driven simulation and control. Under the hood, the fundamental lemma works by applying a persistently exciting input to the system. This ensures that the Hankel matrix of resulting input/output data has the "right" rank, meaning that its columns span the entire subspace of trajectories. However, such binary rank conditions are known to be fragile in the sense that a small additive noise could already cause the Hankel matrix to have full rank. Therefore, in this extended abstract we present a robust version of the fundamental lemma. The idea behind the approach is to guarantee certain lower bounds on the singular values of the data Hankel matrix, rather than mere rank conditions. This is achieved by designing the inputs of the experiment such that the minimum singular value of a deeper input Hankel matrix is sufficiently large. This inspires a new quantitative and robust notion of persistency of excitation. The relevance of the result for data-driven control will also be highlighted through comparing the predictive control performance for varying degrees of persistently exciting data. Copyright © 2022, The Authors. All rights reserved.

关键词： Matrix algebra

来源：评论

学校读者我要写书评

暂无评论

Efficient Topology Assessment for Integrated Transmission and Distribution Network with 10,000+ Inverter-based Resources

Efficient Topology Assessment for Integrated Transmission an...

引用

2022 IEEE Power and Energy Society General Meeting, PESGM 2022

作者： Fu, Tao Wang, Dexin Fan, Xiaoyuan Ren, Huiying Ogle, Jim Chen, Yousu Pacific Northwest National Laboratory Earth System Predictability & Resiliency Group RichlandWA United States Pacific Northwest National Laboratory Optimization & Control Group RichlandWA United States Pacific Northwest National Laboratory Electricity Security Group RichlandWA United States Pacific Northwest National Laboratory Distributed Systems Group RichlandWA United States

ISBN: (数字)9781665408233

ISBN: (纸本)9781665408233

The renewable energy proliferation calls upon the grid operators and planners to systematically evaluate the potential impacts of distributed energy resources (DERs). Consid-ering the significant differences between various inverter-based resources (IBRs), especially the different capabilities between grid-forming inverters and grid-following inverters, it is crucial to develop an efficient and effective assessment procedure besides available co-simulation framework with high computation bur-dens. This paper presents a streamlined graph-based topology assessment for the integrated power system transmission and distribution networks. Graph analyses were performed based on the integrated graph of modified miniWECC grid model and IEEE 8500-node test feeder model, high performance computing platform with 40 nodes and total 2400 CPUs has been utilized to process this integrated graph, which has 100,000+ nodes and 10,000+ IBRs. The node ranking results not only verified the applicability of the proposed method, but also revealed the potential of distributed grid forming (GFM) and grid following (GFL) inverters interacting with the centralized power plants. © 2022 IEEE.

关键词： Topology

来源：评论

学校读者我要写书评

暂无评论

MPA EEG Model-based Vigilance Level Estimation by Artificial Neural Network

MPA EEG Model-based Vigilance Level Estimation by Artificial...

引用

2011 4th International Conference on Biomedical Engineering and Informatics(第四届生物医学工程与信息学国际会议 BMEI 2011)

作者： Bei Wang Jiesen Wang Xingyu Wang Masatoshi Nakamura Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationSc Research Institute of Systems Control Institute for Advanced Research and Education Saga University

In this paper, the vigilance levels during day time short nap sleep were estimated on the basis of Markov Process Amplitude (MPA) EEG model. The ultimate purpose was to adopt the MPA model to discriminate three levels of vigilance through a simple neural network. A set of parameters were firstly calculated based on MPA EEG model. Secondly, correlation analysis was adopted to extract effective parameters to ensure a small amount of inputs of the artificial neural network. The outputs of artificial neural network were the classified three levels: wakeful, drowsy and sleep. The obtained estimation result showed that the accuracy of wakeful was about 90.0％, drowsy 80.0％, and sleep 93.3％.

关键词： MPA EEG model correlation analysis artificial neural network power spectrum

来源：评论

学校读者我要写书评

暂无评论

ℋ∞ Consensus control of Multi-agent systems with Round-robin Protocol and Missing Measurements: The Finite-horizon Case

ℋ∞ Consensus Control of Multi-agent Systems with Round-rob...

引用

Chinese control and Decision Conference, CCDC

作者： Mengmeng Sun Dongyan Chen Heilongjiang Provincial Key Laboratory of Optimization Control and Intelligent Analysis for Complex Systems Harbin University of Science and Technology Harbin China

The ℋ ∞ consensus control problem is handled for a class of discrete time-varying multi-agent systems with round-robin protocol and missing measurements. The round-robin protocol is considered, which allows only one agent can send its measurement data at each transmission step in order to prevent the data collisions. And the missing measurements phenomenon is described by a sequence of Bernoulli distributed random variables with known probabilities. We focus on designing the controller parameters to guarantee that the closed-loop multi-agent systems with missing measurements satisfy the ℋ ∞ consensus performance. On this basis, some sufficient and necessary conditions are obtained by solving coupled backward recursive Riccati difference equations, where the existence and feasibility of the control scheme can be obtained with the help of the completing squares method and the stochastic analysis technique. At last, a numerical example is given to illustrate the effectiveness of the developed controller design scheme.

关键词： Protocols Multi-agent systems Time-varying systems Difference equations Random variables Output feedback

来源：评论

学校读者我要写书评

暂无评论

H/sub /spl infin// control with preview and delay

H/sub /spl infin// control with preview and delay

引用

American control Conference (ACC)

作者： Y. Kuroiwa H. Kimura Biological Control Systems Laboratory Bio-mimetic Control Centre RIKEN Institute of Physical and Chemical Research Nagoya Japan The Division of Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

An H/sub /spl infin// control problem with simultaneous consideration of preview and delay is solved, where past signals and future signals are essential to describe behaviors of the control system. Solvability conditions and complete controller parameterization are derived in the frequency domain within the scope of finite dimensional computations, that is, infinite dimensional aspects attributed to preview and delay are transformed to equivalent finite dimensional problems. The two-degree-of-freedom version is also considered.

关键词： Transfer functions control systems Delay effects Adaptive control Signal design Frequency domain analysis Chemical technology Biological control systems Feedback loop control theory

来源：评论

学校读者我要写书评

暂无评论

Distributed relative attitude formation control of multiple rigid-body agents with switching topologies

Distributed relative attitude formation control of multiple ...

引用

Chinese control Conference (CCC)

作者： Wenjun Song Yiguang Hong Xiaoming Hu Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing Beijing CN Optimization and Systems Theory Royal Institute of Technology Stockholm SE

This paper formulates and investigates the relative attitude formation problem of a group of rigid-body agents with directed and switching sensing topologies. Each agent can only measure the attitudes of its neighbors from the body-fixed frame of the agent. Based on the axis-angle representation of the error attitude, we present a distributed protocol and then show how to achieve the desired relative attitude formation, provided that the inter-agent topology graph is jointly connected and each relative attitude between agents initially is contained within a geodesic ball of radius less than 2p/3 centered at its desired relative attitude. A numerical example is provided to show the effectiveness of the proposed angular velocity control scheme.

关键词： Switches Attitude control Vectors Topology Synchronization Closed loop systems Angular velocity

来源：评论

学校读者我要写书评

暂无评论

A bisection algorithm for the mixed /spl mu/ upper bound and its supremum

A bisection algorithm for the mixed /spl mu/ upper bound and...

引用

American control Conference (ACC)

作者： C.-M. Fransson M.A. Saunders Control and Automation Laboratory Department of Signals and Systems Chalmers University of Technology Goteborg Sweden Systems Optimization Laboratory Department of Management Science and Engineering University of Stanford Stanford CA USA

A new approach to computing the mixed /spl mu/ upper bound (v) is presented. The method exploits the fact that a positive definite matrix V(/spl alpha/) becomes singular when the scalar parameter a decreases to a critical value for a given frequency. A two-level optimization strategy is used with a bisection algorithm branching on the definiteness of V in an outer loop, and a semi-definite programming (SDP) problem is formulated in an inner loop. Three different formulations are posed for the inner loop. The first uses a feasibility formulation (no objective function) with a constraint V/spl ges/0, which tends to make V singular if possible. The second introduces an additional variable that makes the SDP feasible at all times. In the third formulation, the trace of V is minimized with the constraint V /spl ges/0, which tends to minimize the rank of V and hence make V singular. The method is applied to a distillation column benchmark problem. Although it is computationally more expensive than existing methods when computing v for a single frequency, it is a conceptually simple method that can be efficient when computing the supremum of v with respect to frequency.

关键词： Upper bound Frequency Robust control Laboratories Uncertainty Mathematical model Constraint optimization Automatic control Automation Engineering management

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：