检索结果-内蒙古大学图书馆

H ∞ Bounded Resilient state-feedback design for linear continuous-time systems – A robust control approach

IFAC Proceedings Volumes 2011年第1期44卷 9307-9312页

作者： C. Briat J.J. Martinez ACCESS Linnaeus Centre Division of Optimization and Systems Theory Royal Institute of Technology (KTH) 100 44 Stockholm Sweden GIPSA-Lab Domaine Universitaire – BP46 38402 Saint Martin d'Hères – Cedex FRANCE

Abstract The quadratic stabilization of LTI systems by bounded resilient state-feedback controllers is addressed. The controllers are guaranteed to be non-fragile with respect to either uniform or nonuniform maximal implementation errors. The design of resilient controller relies on an LMI problem while boundedness of the coefficients (a NP-Hard problem) can be guaranteed by solving a nonconvex problem involving a BMI. The latter problem is solved using proposed locally convergent iterative LMI algorithms. Finally, an example is considered in order to illustrate the effectiveness of the approach.

关键词： Fragility Bounded Controllers Linear systems Robust Control H ∞ control Relaxation

来源：评论

学校读者我要写书评

暂无评论

Distributed Positioning of Autonomous Mobile Sensors with Application to Coverage Control

Distributed Positioning of Autonomous Mobile Sensors with Ap...

引用

2011 American Control Conference (ACC)

作者： Hans-Bernd Durr Milos S. Stankovic Karl Henrik Johansson Institute for Systems Theory and Automatic Control University of Stuttgart Germany ACCESS Linnaeus Center School of Electrical Engineering Royal Institute of Technology Stockholm Sweden

We consider problems in multi-agent systems where a network of mobile sensors needs to self-organize such that some global objective function is maximized. To deal with the agents' lack of global information we approach the problem in a game-theoretic framework where agents/players are only able to access local measurements of their own local utility functions whose parameters and detailed analytical forms may be unknown. We then propose a distributed and adaptive algorithm, where each agent applies a local extremum seeking feedback adopted to its specific motion dynamics, and prove its global practical stability, implying that the agents asymptotically reach a configuration that is arbitrary close to the globally optimal one. For the stability analysis we introduce a novel methodology based on a Lie bracket trajectory approximation and combine it with a potential game approach. We apply the proposed algorithm to the sensor coverage problem and solve it in a distributed way where the agents do not need any a priori knowledge about the distribution of the events to be detected and about the detection probabilities of the individual agents. The proposed scheme is illustrated through simulations.

关键词： Sensors Games Asymptotic stability Trajectory Mathematical model Stability analysis Convergence

来源：评论

学校读者我要写书评

暂无评论

Observer-based tracking problem of leader-follower multi-agent systems

Observer-based tracking problem of leader-follower multi-age...

引用

作者： Wang, Jinhuan Hu, Xiaoming School of Sciences Hebei University of Technology Tianjin 300130 China Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Stockholm 100 44 Sweden

ISBN: (纸本)9787894631046

In this paper, we consider the tracking problem for leader-follower multi-agent systems moving in the plane. In our model, the system matrix of the leader can be of any form and the control input of the leader is not known to the followers even if they are connected to the leader. To track such a leader, an observer-based decentralized feedback controller is designed for each follower. We show that if the adjacent graph of the system is connected, with the proposed control law, all the followers can track the leader eventually. At last, we generalize the result to the higher dimension case for some special system matrix of the leader.

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

Observer-based tracking problem of leader-follower multi-agent systems

Observer-based tracking problem of leader-follower multi-age...

引用

Chinese Control Conference (CCC)

作者： Jinhuan Wang Xiaoming Hu Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Stockholm Sweden School of Sciences Hebei University of Technology Tianjin P. R. China

关键词： Lead Eigenvalues and eigenfunctions Observers Trajectory Multiagent systems Polynomials Symmetric matrices

来源：评论

学校读者我要写书评

暂无评论

Robust formation control for nonlinear mobile sensors in target tracking

Robust formation control for nonlinear mobile sensors in tar...

引用

2010第六届全国多智能体系统与控制学术年会

作者： Hu Jiangping Hong Yiguang Hu Xiaoming School of Automation Engineering University of Electronic Science and Technology of China 611731 Che Key Lab of Systems and Control Institute of Systems ScienceChinese Academy of SciencesBeijing 1001 0ptimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of TechnologySE-100 44 S

Collaborative signal processing and sensor deployment have been among the most important research tasks in target tracking using networked *** this paper,a convergent nonlinear filter is constructed to track a target using mobile nonlinear scalar range *** robust formation control is proposed for the mobile sensor network to achieve a desired deployment to guarantee the nonlinear convergent ***,a numerical example is given to illustrate the proposed tracking algorithm.

关键词： Target tracking convergent nonlinear observer-based filter formation control mobile sensors

来源：评论

学校读者我要写书评

暂无评论

Consensus of High Order Linear Multi-agent systems Using Output Error Feedback

Consensus of High Order Linear Multi-agent Systems Using Out...

引用

Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Jinhuan Wang Zhixin Liu Xiaoming Hu School of Sciences Hebei University of Technology Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

In this paper,we study the consensus problem of multi-agent systems in which each agent adopts the same linear model that can be of any *** consider the case where only the relative output error between the neighboring agents can be *** order to solve the consensus problem,two kinds of decentralized control laws are *** first show that a static output error feedback control can solve the consensus problem if some further constraints on the system model is *** we use an observer based approach to design a dynamic output error feedback consensus *** note that with the observer based approach,some information exchange between the agents is needed unless the associated adjacent graph is completely connected.

关键词： Consensus of High Order Linear Multi-agent systems Using Output Error Feedback agent

来源：评论

学校读者我要写书评

暂无评论

OPTIMAL TARGET TRAJECTORY ESTIMATION AND FILTERING USING NETWORKED SENSORS

引用

Journal of systems Science & Complexity 2008年第3期21卷 325-336页

作者： Jiangping HU Xiaoming HU Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Stockholm 10044 Sweden

Target tracking using distributed sensor network is in general a challenging problem because it always needs to deal with real-time processing of noisy information. In this paper the problem of using nonlinear sensors such as distance and direction sensors for estimating a moving target is studied. The problem is formulated as a prudent design of nonlinear filters for a linear system subject to noisy nonlinear measurements and partially unknown input, which is generated by an exogenous system. In the worst case where the input is completely unknown, the exogenous dynamics is reduced to the random walk model. It can be shown that the nonlinear filter will have optimal convergence if the number of the sensors are large enough and the convergence rate will be highly improved if the sensors are deployed appropriately. This actually raises an interesting issue on active sensing： how to optimally move the sensors if they are considered as mobile multi-agent systems？ Finally, a simulation example is given to illustrate and validate the construction of our filter.

关键词： Optimal filter sensor network target tracking

来源：评论

学校读者我要写书评

暂无评论

Constructive camera pose control for optimizing multiview distributed video coding

Constructive camera pose control for optimizing multiview di...

引用

IEEE Conference on Decision and Control

作者： Jianghua Zhong Xiaoming Hu W. Bastiaan Kleijn Ermin Kozica Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Stockholm Sweden Sound and Image Processing and ACCESS Linnaeus Center Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781424431236

In this paper camera pose control for optimizing multiview distributed video coding is considered. The scenario considered is that multiple agents with monocular cameras observe a common scene in a three dimensional world. To get a good video reconstruction under a transmission rate constraint, the camera closest to the center of the camera array is chosen as the reference camera. The poses of all other cameras are controlled and designed such that their images are maximally similar under a constraint on their separation. Based on the rigid motion allowed for the cameras, two cases are considered. For the case where the rigid motion only involves translation, translation control is designed. For the case where it involves both translation and rotation, both controls are constructed. Some simulated results are given to show the efficiency of the designed controllers.

关键词： Cameras Video coding Video compression Image reconstruction Decoding Layout Computational complexity Control systems Motion control Costs

来源：评论

学校读者我要写书评

暂无评论

On the number of leaders needed to ensure network connectivity

On the number of leaders needed to ensure network connectivi...

引用

IEEE Conference on Decision and Control

作者： Dimos V. Dimarogonas Tove Gustavi Magnus Egerstedt Xiaoming Hu KTH ACCESS Linnaeus Center School of Electrical Engineering Royal Institute of Technology Stockholm Sweden Optimization and Systems Theory and KTH ACCESS Linnaeus Center Royal Institute of Technology Stockholm Sweden School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

ISBN: (纸本)9781424431236

In this paper we examine the leader-to-follower ratio needed to maintain connectivity in a leader-follower multi-agent network with proximity based communication topology. In the scenario we consider, only the leaders are aware of the global mission, which is to converge to a known destination point. Thus, the objective of the leaders is to drag the team to the desired goal. In the paper we obtain bounds on the number of leaders needed to complete the task while guaranteeing that connectedness of the communication graph is maintained. The results are first established for an initially complete communication graph and then extended to the incomplete case. The results are illustrated by computer simulations.

关键词： Communication system control Control systems Network topology Computer simulation Application software Robot sensing systems Sensor systems and applications Encoding systems engineering and theory Costs

来源：评论

学校读者我要写书评

暂无评论

Framework for analysis of opportunistic schedulers: average sum rate vs. average fairness

Framework for analysis of opportunistic schedulers: average ...

引用

International Symposium on Modeling and optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)

作者： Eduard A. Jorswieck Aydin Sezgin Xi Zhang Chair of Communication Theory Communications Laboratory Dresden University of Technology Germany Information Systems Laboratory University of Stanford USA ACCESS Linnaeus Center KTH Signal Processing Laboratory Royal Institute of Technology Sweden

ISBN: (纸本)9781424431212

Channel aware and opportunistic scheduling algorithms exploit the channel knowledge and fading to increase the average throughput. The maximum throughput scheduler (MTS) transmits only to the best user at a time. It is unfair to users at the cell edge. Obviously, there is a tradeoff between average throughput and fairness in the system. In this work, we study four representative schedulers, namely the MTS, the proportional fair scheduler (PFS), the (relative) opportunistic round robin scheduler (ORS), and the round robin scheduler (RRS). We show that the average sum rate performance and the average worst-case delay depend strongly on the user distribution within the cell. MTS gains from asymmetrically distributed users whereas the other three schedulers suffer. On the other hand, the average fairness of MTS and PFS decreases with asymmetrical user distribution. The key contribution of this paper is to put these tradeoffs and observations on a solid theoretical basis. The scaling laws of the average sum rate with the number of users as well as of the average worst-case delay are derived. Both the PFS and the ORS provide a reasonable performance in terms of throughput and fairness. However, PFS outperforms ORS for symmetrical user distributions, whereas ORS outperforms PFS for asymmetrical user distributions.

关键词： Throughput Round robin Delay Laboratories Scheduling algorithm Information systems Signal processing algorithms Fading Solids Channel capacity

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：