检索结果-内蒙古大学图书馆

Vehicle density estimation of freeway traffic with unknown boundary demand-supply: an interacting multiple model approach

引用

IET CONTROL THEORY AND APPLICATIONS 2015年第13期9卷 1989-1995页

作者： Zhang, Liguo Mao, Xuerong Beijing Univ Technol Sch Elect & Control Engn Beijing 100124 Peoples R China Key Lab Computat Intelligence & Intelligent Syst Beijing 100124 Peoples R China Univ Strathclyde Dept Math & Stat Glasgow G1 1XH Lanark Scotland

As distributed parameter systems, dynamics of freeway traffic are dominated by the current traffic parameter and boundary fluxes from upstream/downstream sections or on/off ramps. The difference between traffic demand-supply and boundary fluxes actually reflects the congestion level of freeway travel. This study investigates simultaneous traffic density and boundary flux estimation with data extracted from on-road detectors. The existing studies for traffic estimation mainly focus on the traffic parameters (density, velocity etc.) of mainline traffic and ignore flux fluctuations at boundary sections of the freeway. The authors propose a stochastic hybrid traffic flow model by extending the cell transmission model with Markovian multi-mode switching. A novel interacting multiple model filtering for simultaneous input and state estimation is developed for discrete-time Markovian switching systems with unknown input. A freeway segment of Interstate 80 East (I-80E) in Berkeley, Northern California, is chosen to investigate the performance of the developed approach. Traffic data is obtained from the performance measurement system.

关键词： distributed parameter systems road traffic control Markov processes state estimation discrete time systems switching systems (control) road vehicles distributed parameter system freeway traffic dynamics boundary flux traffic parameter estimation traffic demand-supply stochastic hybrid traffic flow model cell transmission model Markovian multimode switching interacting multiple model filtering state estimation discrete-time Markovian switching systems performance measurement system vehicle density estimation

来源：评论

学校读者我要写书评

暂无评论

Boundary control for flexible mechanical systems with input dead-zone

引用

NONLINEAR DYNAMICS 2015年第4期82卷 1763-1774页

作者： Zhang, Shuang He, Wei Nie, Shuangxi Liu, Chang Univ Elect & Technol China Sch Aeronaut & Astronaut Chengdu 611731 Peoples R China Univ Sci & Technol Beijing Sch Automat & Elect Engn Beijing 100083 Peoples R China Univ Elect Sci & Technol China Sch Automat Engn Chengdu 611731 Peoples R China

In this paper, the control problem for flexible mechanical systems with input dead-zone nonlinearity is investigated. We employ the boundary control technique aiming at regulating the deformation of flexible mechanical systems (including both the string and the Euler-Bernoulli beam) in the presence of various external disturbances. With the proposed control method, we prove that all the states of the closed-loop flexible mechanical systems are uniformly ultimately bounded, and the input dead-zone nonlinearity and boundary external disturbance are handled. Numerical simulation studies are carried out to verify the effectiveness of the developed boundary control.

关键词： distributed parameter system Flexible mechanical system Vibration control Input dead-zone Boundary control

来源：评论

学校读者我要写书评

暂无评论

Vibration Control of a Nonuniform Wind Turbine Tower via Disturbance Observer

引用

IEEE-ASME TRANSACTIONS ON MECHATRONICS 2015年第1期20卷 237-244页

作者： He, Wei Ge, Shuzhi Sam Univ Elect Sci & Technol China Sch Automat Engn Chengdu 611731 Peoples R China Natl Univ Singapore Dept Elect & Comp Engn Singapore 117576 Singapore Univ Elect Sci & Technol China Sch Comp Sci & Engn Inst Robot Chengdu 611813 Peoples R China

In this paper, the vibration control problem is studied for a wind turbine tower subjected to random wind loads. The tower is modeled as a nonuniform Euler-Bernoulli beam system with distributed parameters by using the Hamilton's principle. The control force is applied at the top boundary of the tower to suppress the vibrations of the tower. Disturbance observer is designed to attenuate the disturbance at the top of the tower. The stability of the whole system is rigorously proved via the Lyapunov analysis and the satisfactory control performance is guaranteed under the proper choice of the design parameters. Numerical results are provided to illustrate that the designed controller is effective in dissipating the vibrations of the tower.

关键词： distributed parameter system disturbance observer modeling vibration control

来源：评论

学校读者我要写书评

暂无评论

Stochastic gradient algorithm for distributed parameter systems

Stochastic gradient algorithm for distributed parameter syst...

引用

第26届中国过程控制会议（CPCC2015）

作者： CHEN Jing ZOU Hongfen Wuxi Professional College of Science and Technology School of Internet of Things Engineering Jiangnan University

This paper proposes an identification method for distributed parameter *** using the difference algorithm,the distributed parameter system is simplified as a lumped parameter *** a stochastic gradient algorithm and a forgetting factor stochastic gradient algorithm are proposed to estimate the parameters of the lumped parameter ***,the parameters of the distributed parameter system can be *** simulation results indicate that the proposed method is effective.

关键词： parameter estimation distributed parameter system Stochastic gradient Difference algorithm Forgetting factor

来源：评论

学校读者我要写书评

暂无评论

Closed-loop P-type Iterative Learning Control of Uncertain Linear distributed parameter systems

引用

IEEE/CAA Journal of Automatica Sinica 2014年第3期1卷 267-273页

作者： Xisheng Dai Senping Tian Yunjian Peng Wenguang Luo the School of Electrical and Information Engineering Guangxi University of Science and Technology the School of Information and Electrical Engineering Shandong University of Science and Technology the School of Automation Science and Engineering South China University of Technology

An iterative learning control problem for a class of uncertain linear parabolic distributed parameter systems is discussed,which covers many processes such as heat and mass transfer,convection diffusion and *** condition of allowing system state initially to have error in the iterative process a closed-loop P-type iterative learning algorithm is presented,and the sufficient condition of tracking error convergence in L2 norm is ***,the convergence of the tracking error in L2 and W1,2 space is proved by using Gronwall-Bellman inequality and Sobolev *** the end,a numerical example is given to illustrate the effectiveness of the proposed method.

关键词： Algorithm design and analysis Closed loop systems Iterative methods Learning (artificial intelligence) Uncertainty Iterative learning control closed-loop P-type learning algorithm distributed parameter system Plant uncertain distributed parameter systems Algorithm design and analysis Iterative learning control follow error Uncertainty Closed loop systems iterative methods

来源：评论

学校读者我要写书评

暂无评论

Order reduction and control of hyperbolic, countercurrent distributed parameter systems using method of characteristics

引用

CHEMICAL ENGINEERING SCIENCE 2014年 110卷 153-163页

作者： Munusamy, Sudhakar Narasimhan, Sridharakumar Kaisare, Niket S. Indian Inst Technol Dept Chem Engn Madras 600036 Tamil Nadu India ABB Corp Res Ctr Bangalore 560048 Karnataka India

The aim of this paper is to develop a model reduction technique based on method of characteristics (MOC) for control of counter-current distributed parameter systems that are modeled by semi-linear hyperbolic partial differential equations (ROES). In our previous work, MOC was shown to be a suitable model reduction technique tot a class of hyperbolic PDEs. This concept is extended to counter-current systems, wherein the so-called characteristic lines have slopes with opposite signs. Two different approximations are proposed that allow the use of MOC as a model reduction technique. The open-loop results from MOC are compared with a large dimensional model, based on the method of lines. The MOC-based models are used for closed loop simulations within the approximate dynamic programming (ADP) framework. Two case studies are considered: a non-adiabatic plug flow reactor (having characteristics with two different slopes) and a non-adiabatic fixed bed reactor (having characteristics with three different slopes). We demonstrate that using the MOC-based model in an ADP controller results in a significant improvement in computational time, along with a slight improvement in controller performance. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： distributed parameter system Method of characteristics Hyperbolic PDE Counter current systems Approximate dynamic programming Model order reduction

来源：评论

学校读者我要写书评

暂无评论

Vibration Control of a Nuclear Fuel Rod Maneuvering Under Water 15

Vibration Control of a Nuclear Fuel Rod Maneuvering Under Wa...

引用

15th International Conference on Control, Automation and systems (ICCAS)

作者： Shah, Umer Hameed Piao, Mingxu Kim, Gyoung-Hahn Hong, Keum-Shik Pusan Natl Univ Sch Mech Engn Busan 609735 South Korea

ISBN: (纸本)9788993215090

This paper addresses the vibration control problem of a fuel transport system (FTS) in a nuclear power plant. The FTS transports the fuel rods in the nuclear reactor to desired locations within the fuel building. The fuel rods must be transported under water to avoid radiation leaks into the environment. It has been observed that a quick maneuver of the trolley can cause vibrations that can damage the structure of the fuel rods, due to the hydrodynamic force exerted by the surrounding fluid. In this study, a distributed parameter model of the FTS, using the extended Hamilton's principle, is developed. The developed model is verified with experiments. A velocity command is designed, as an open-loop control, to transport the fuel rods in quick time to the target locations with minimal vibrations. The residual vibrations of the fuel rod are controlled while considering the effects of the hydrodynamic force imposed by the surrounding water. Simulation and experimental results show that the proposed velocity command transports the fuel rods to the target location quickly resulting in a significant decrease in the rod's vibrations.

关键词： Vibration control distributed parameter system nuclear power plant fuel transport system

来源：评论

学校读者我要写书评

暂无评论

Stabilization of an Inhomogeneous Heat Equation Subject to Constraint 15

Stabilization of an Inhomogeneous Heat Equation Subject to C...

引用

15th International Conference on Control, Automation and systems (ICCAS)

作者： Zhang, Shuang Yang, Chuan Nie, Shuangxi He, Wei Univ Sci & Technol Beijing Sch Automat & Elect Engn Beijing 100083 Peoples R China Univ Elect & Technol China Sch Aeronaut & Astronaut Chengdu 611731 Peoples R China Univ Elect & Technol China Sch Automat Engn Chengdu 611731 Peoples R China

ISBN: (纸本)9788993215090

In this paper, the constrained problem is investigated for an inhomogeneous heat equation with distributed load. The control objectives are to develop the control law so that the temperature can track a desired reference signal, and ensure that the temperature remains in a constrained space. We show that, with the proposed sliding-mode control method, the tracking error is bounded stable without violation of the constraint. Extensive simulations are provided to illustrate the performance of the control system.

关键词： distributed parameter system Sliding-mode control Heat equation Infinite dimensional system Constraint

来源：评论

学校读者我要写书评

暂无评论

Nonlinear parameters estimation via Zakai filtering in deposition process control

Nonlinear parameters estimation via Zakai filtering in depos...

引用

17th IFAC Symposium on system Identification (SYSID 2015)

作者： Tenno, R. Aalto Univ Sch Elect Engn POB 15600 Aalto Finland

A stochastic evolutionary process inspired by electrodeposition is considered in single dimension. The process is fixed on one boundary and is observed-controlled on other boundary where the process in addition is influenced by the umnodelled side reactions;their effect on the boundary is considered as a random noise that disturbs the control and measurements. The process is given by a finite diffusion process model which main parameters are unknown: the diffusivity of species and thickness of the diffusion layer are unknown, also the throwing power of electrolyte is unknown and, in addition, the systematic effect of the side reactions is unknown. Even so the paper demonstrates in certain additional condition that the deposition process can be We 11 controlled using feed-forward boundary controls adapted with the estimated parameters in the course of Zakai filtering. The consistency of estimates is exposed in simulation as Well as the stabilising property of the adaptive control. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Nonlinear filtering boundary control distributed parameter system electrodeposition

来源：评论

学校读者我要写书评

暂无评论

Mobile sensor networks for sampled-data control of a class of distributed parameter systems

Mobile sensor networks for sampled-data control of a class o...

引用

26th Chinese Control and Decision Conference (CCDC)

作者： Qian, Xueming Cui, Baotong Jiangnan Univ Minist Educ Key Lab Adv Proc Control Light Ind Wuxi 214122 Peoples R China

ISBN: (纸本)9781479937066

This paper develop the sampled-data control problem of a class of distributed parameter systems. A novel sampled-data control scheme is presented using mobile sensor networks. By utilizing a Lyapunov functional which depend on spatial parameter, a controller combine to decentralized static output feedback control scheme and the point measurement of the mobile sensor is designed to derive several sufficient criteria ensuring the distributed parameter systems to be globally asymptotically stable. The criteria are given in the form of linear operator inequalities and the velocity law of each mobile sensor. It is also shown that static sampled-data control of distributed parameter systems is just a special case of our main results. A numerical simulations illustrate the effectiveness of the proposed control scheme in enhancing system performance.

关键词： distributed parameter system Sampled-data control Mobile sensor networks

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：