检索结果-内蒙古大学图书馆

The ${\cal H}_{2} $ control Problem for Quadratically Invariant systems With Delays

IEEE Transactions on automatic control 2015年第7期60卷 1945-1950页

作者： Andrew Lamperski John C. Doyle Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN USA Control and Dynamical Systems California Institute of Technology Pasadena CA USA

This technical note gives a new solution to the output feedback H 2 problem for quadratically invariant communication delay patterns. A characterization of all stabilizing controllers satisfying the delay constraints is given and the decentralized H 2 problem is cast as a convex model matching problem. The main result shows that the model matching problem can be reduced to a finite-dimensional quadratic program. A recursive state-space method for computing the optimal controller based on vectorization is given.

关键词： Delays Computational modeling Finite impulse response filters Matrix decomposition Optimal control Regulators Dynamic programming

来源：评论

学校读者我要写书评

暂无评论

Generalization of optimal motion trajectories for bipedal walking

Generalization of optimal motion trajectories for bipedal wa...

引用

IEEE/RSJ International Conference on Intelligent Robots and systems

作者： A. Werner D. Trautmann Dongheui Lee R. Lampariello German Aerospace Center (DLR) Institute of Robotics and Mechatronics Chair of Automatic Control Engineering Department of Electrical and Computer Engineering Technische Universität München (TUM)

control of robot locomotion profits from the use of pre-planned trajectories. This paper presents a way to generalize globally optimal and dynamically consistent trajectories for cyclic bipedal walking. A small task-space consisting of stride-length and step time is mapped to spline parameters which fully define the optimal joint space motion. The paper presents the impact of different machine learning algorithms for velocity and torque optimal trajectories with respect to optimality and feasibility. To demonstrate the usefulness of the trajectories, a control approach is presented that allows general walking including transitions between points in the task-space.

关键词： Trajectory Legged locomotion Machine learning algorithms Cost function Splines (mathematics)

来源：评论

学校读者我要写书评

暂无评论

ANFIS Data Driven Modeling and Real-Time Fuzzy Logic controller Test for a Two Tanks Hydraulic System

ANFIS Data Driven Modeling and Real-Time Fuzzy Logic Control...

引用

IEEE International Conference on Evolving and Adaptive Intelligent systems

作者： L. A. Torres-Salomao J. Anzurez-Marin J. M. Orozco-Sixtos S. Ramirez-Zavala Automatic Control and Systems Engineering Department The University of Sheffield Division de Estudios de Postgrado Facultad de Ingenieria Electrica UMSNH

ISBN: (纸本)9781467366991

This paper presents a non-linear, data driven Adaptive Network based Fuzzy Inference System (ANFIS) modeling of a Two Tanks Hydraulic System (TTHS). The paper also addresses the design of a Type 1 Fuzzy Logic controller optimized with Genetic Algorithms (GA). The controller was designed and tested in simulation with the obtained ANFIS model and validated in real-time with the actual TTHS. Obtained model shows an accurate and adequate description of the real system, useful for many applications that require a non-linear functioning representation of the TTHS. The designed controller also demonstrates excellent performance by being able to follow diverse shaped references. This work successfully demonstrates the utility of soft-computing techniques in their application to real world industrial complex systems.

关键词： Modeling control Neural networks Fuzzy inference system Heuristics Real-time Complex systems Non-linear fuzzy inference system Complex systems Heuristics Neural network Modeling fuzzy logic controller data driven Hydraulic system Real time Standing Orders Tanks Tanks

来源：评论

学校读者我要写书评

暂无评论

Optimal Placement of the Distribution Substations to Improve Reliability Under Load Growth

Optimal Placement of the Distribution Substations to Improve...

引用

IEEE Power and Energy Society General Meeting

作者： M. R. Haghifam M. Esmaeeli A. Kazemi H. Shayanfar Faculty of Electrical and Computer Engineering Tarbiat Modares University Center of Excellence for Power Systems Control and Operation Department of Electrical Engineering Iran University of Science and Technology

ISBN: (纸本)9781467380416

In this paper, an approach is proposed for planning distribution networks in which the placement of distribution transformer is optimally planned. The size, number, and placement of distribution transformers are optimally determined in order to improve system reliability and to minimize the losses under load growth. An objective function is constituted, composed of the investment cost, maintenance cost, loss cost, and reliability cost. The reliability worth is not usually considered in the optimization of the distribution substation placement. However, it may be effective on the planning problem. The proposed approach is applied to a test system consisting of 42 electric load points. It is observed that the considering reliability in the planning approach reduces the total cost of the distribution transformer placement. However, the associated investment cost is increased but the reliability cost is more decreased.

关键词： Distribution Planning Load Growth Mixed Integer Nonlinear Programming (MINLP) Reliability Transformer

来源：评论

学校读者我要写书评

暂无评论

Event-triggered control for Vehicle Platooning

Event-triggered Control for Vehicle Platooning

引用

American control Conference

作者： Steffen Linsenmayer Dimos V. Dimarogonas Institute for Systems Theory and Automatic Control University of Stuttgart Germany ACCESS Linnaeus Centre School of Electrical Engineering KTH Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781479917730

This paper presents a method to control vehicular platoons in an event-triggered fashion. Therefore, every vehicle broadcasts its position and velocity information only at discrete event times. These events are determined by a trigger rule only depending on the agents state and on time. Two control architectures are considered. The first one, called symmetric bidirectional, uses information of the front and back neighbor in the control law. The architecture is analyzed with a linear controller and it is shown that the state error converges to an adjustable region around the origin. In earlier work it is suggested to use a nonlinear controller if solely information from the front neighbor is available. Thus, a nonlinear event-triggered predecessor-following control is developed and analyzed additionally. Not only bounds are given for the state of each vehicle, but it is also shown that the converging input converging state property holds. In both cases we guarantee the existence of a lower bound on the inter-event times. The benefits of both strategies are verified in numerical simulations.

关键词： Integrated circuits

来源：评论

学校读者我要写书评

暂无评论

A Bayesian compressed sensing Kalman filter for direction of arrival estimation

A Bayesian compressed sensing Kalman filter for direction of...

引用

International Conference on Information Fusion

作者： Matthew Hawes Lyudmila Mihaylova Francois Septier Simon Godsill Department of Automatic Control and Systems Engineering University of Sheffield UK CRIStAL UMR CNRS 9189 Institute Mines Telecom/Telecom Lille France Department of Engineering Cambridge University UK

ISBN: (纸本)9781479974047

In this paper, we look to address the problem of estimating the dynamic direction of arrival (DOA) of a narrowband signal impinging on a sensor array from the far field. The initial estimate is made using a Bayesian compressive sensing (BCS) framework and then tracked using a Bayesian compressed sensing Kalman filter (BCSKF). The BCS framework splits the angular region into N potential DOAs and enforces a belief that only a few of the DOAs will have a non-zero valued signal present. A BCSKF can then be used to track the change in the DOA using the same framework. There can be an issue when the DOA approaches the endfire of the array. In this angular region current methods can struggle to accurately estimate and track changes in the DOAs. To tackle this problem, we propose changing the traditional sparse belief associated with BCS to a belief that the estimated signals will match the predicted signals given a known DOA change. This is done by modelling the difference between the expected sparse received signals and the estimated sparse received signals as a Gaussian distribution. Example test scenarios are provided and comparisons made with the traditional BCS based estimation method. They show that an improvement in estimation accuracy is possible without a significant increase in computational complexity.

关键词： Direction-of-arrival estimation Arrays Estimation Bayes methods Kalman filters Compressed sensing Noise

来源：评论

学校读者我要写书评

暂无评论

Model Selection to Enhance Prediction Performance in the Presence of Missing Data

Model Selection to Enhance Prediction Performance in the Pre...

引用

International Conference on Methods and Models in Automation and Robotics

作者： Faraj Bashir Hua-Liang Wei Abdollha Benomair University of Sheffield Department of Automatic Control and Systems Engineering Mapping Street Sheffield S1 3JD UK

ISBN: (纸本)9781479987023

Most nonlinear modelling approaches focus on solving a model selection problem with complete data, and in many cases original data are pre-processed with some nonlinear transforms such as Box-Tidwell and fractional polynomial transformation. Often these approaches can lead to models that are better than traditional models (for example, logistic model and quadratic model). However, in the case of missing data, it is not easy to predict the relationship between the predictor and dependent variables;traditional nonlinear models in some cases of missing data analysis give poor results. This paper explains nonlinear model selection techniques for missing data. It includes an overview of nonlinear model selection with complete data, and provides accessible descriptions of Box-Tidwell and fractional polynomial methods for model selection. In particular, this paper focuses on a fractional polynomial method for nonlinear modelling in cases of missing data and presents analysis examples to illustrate performance of the method.

关键词： Model Selection Presence complete data

来源：评论

学校读者我要写书评

暂无评论

A Solvability Condition for Reactive Power Flow

A Solvability Condition for Reactive Power Flow

引用

IEEE Annual Conference on Decision and control

作者： John W. Simpson-Porco Florian Dorfler Francesco Bullo Department of Mechanical Engineering and the Center for Control Dynamical Systems and Computation University of California Santa Barbara Automatic Control Laboratory ETH Zurich 8092 Zurich Switzerland

ISBN: (纸本)9781479978878

A central question in the analysis and operation of power networks is the feasibility of a unique high-voltage solution to the power flow equations satisfying operational constraints. For planning, monitoring, and contingency analysis in transmission networks, the high-voltage solution of these nonlinear equations can be constructed only numerically or roughly approximated using a linear DC power flow. In this work we analytically study the solvability of the nonlinear decoupled reactive power flow equations, and present a solvability condition relating the existence of a unique high-voltage solution to the spatial distribution of loading and the effective impedances between load buses. We validate the accuracy and applicability of our results through standard power network test cases.

关键词： Reactive power Mathematical model Generators Load modeling Power system stability Loading Numerical stability

来源：评论

学校读者我要写书评

暂无评论

On moment matching of transfer functions and their derivatives

On moment matching of transfer functions and their derivativ...

引用

European control Conference (ECC)

作者： T. C. Ionescu Orest V. Iftime Department of Automatic Control and Systems Engineering Univ. of Sheffield Sheffield UK Faculty of Economics and Business University of Groningen Groningen The Netherlands

In this paper we study the problem of computing the (family of) reduced order model(s) that satisfy the following properties the systems match the moments of the given to be reduced system and the same property holds for the first order derivatives of the corresponding transfer functions. We prove that such a model exists and compute it. We also study the problem of moment matching for the state-space representations of the first order derivatives of rational transfer functions. Finally, we show that the model that matches the moment of both the given system and its first order derivative is a member of the family of reduced order models whose first order derivatives achieve moment matching.

关键词： Transfer functions Interpolation Mathematical model Reduced order systems Linear systems Computational modeling Time-domain analysis

来源：评论

学校读者我要写书评

暂无评论

Fault isolation and reconfiguration in a three-zone system

Fault isolation and reconfiguration in a three-zone system

引用

IEEE Electric Ship Technologies Symposium, ESTS

作者： Mark W. Rose Robert M. Cuzner Systems Engineering DRS Power and Control Technologies Milwaukee WI Department of Electrical Engineering University of Wisconsin - Mil waukee Milwaukee WI

This paper provides experimental verification of a fault isolation sequence in a DC Zonal electrical System. Three electrical zones consisting of phase controlled rectifier interfaces to medium voltage AC distribution, two DC distribution buses and downstream converters, inverters feeding loads are energized and bolted faults are applied to various locations. The Fault Isolation and Reconfiguration approach utilizes no load switches for fault isolation aided by de-energization of the affected buses. Three electromechanical no load switches in a single assembly are utilized at the interface between electrical zones. The instantaneous peak fault currents were captured at each switch and sent to adjacent modules over a Ethernet-based Local Area Network in order to locate and isolate the fault to the nearest bus segment. Experimental results show that in most cases full output capacity was restored autonomously. Loss of communications scenarios are tested showing limited power restoration.

关键词： Assembly Finite impulse response filters Circuit faults Ports (Computers) Local area networks Power generation Fault currents

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：