检索结果-内蒙古大学图书馆

An improved nonlinear robust control design for grid-side converter of VSC-HVDC connected to wind power generation system

引用

ELECTRICAL ENGINEERING 2018年第4期100卷 2309-2318页

作者： Lei, Bangjun Zhang, Tao Fei, Shumin Guizhou Inst Technol Sch Elect & Informat Engn Key Lab Power Dig Data Guizhou Prov Guiyang 550003 Peoples R China Qingdao Univ Sci & Technol Colledge Automat Elect Engn Qingdao 260061 Shandong Peoples R China Southeast Univ Sch Automat Minist Educ Key Lab Measurement & Control Complex Syst Engn Nanjing 210096 Jiangsu Peoples R China

This article proposes an improved nonlinear (IN) robust control strategy for the grid-side voltage-source converter (GSVSC) of a VSC-based high-voltage direct current (VSC-HVDC) transmission system connected to a large wind farm by the using Hamiltonian function method. With the help of variable transformation, the nonlinear model with parameter uncertainties and external disturbances of the GSVSC is changed into the port-controlled dissipative Hamiltonian (PCDH) system. Based on the PCDH system, an IN robust control law is established. In order to demonstrate the effectiveness and robustness of the IN robust control, the backstepping power control (BPC), which is developed by using the backstepping design procedure in the sense of Lyapunov stability theorem for the GSVSC to satisfy the control objectives of a stable HVDC bus and the grid connection with a unity power factor, is selected as a comparison object. Generally speaking, the system used by the backstepping method must have special strict feedback of the lower triangular structure, but the wind farm connected to the power grid with the VSC-HVDC is a multivariable structure and highly coupled nonlinear system. So, the BPC cannot effectively maintain and utilize the nonlinear characteristics of the VSC-HVDC system, while this nonlinear physical structure characteristics is very useful for the design of a nonlinear controller. The greatest advantage of the Hamilton function method is that it can effectively keep and utilize the nonlinear characteristics of the system. The simulation results indicate that the proposed IN control designed by using the Hamilton function method gains the advantage over the BPC under a variety of operating conditions.

关键词： VSC-HVDC PCDH system Hamiltonian function method nonlinear robust control Oscillations damping Transient stability

来源：评论

学校读者我要写书评

暂无评论

A brand new nonlinear robust control design of SSSC for transient stability and damping improvement of multi-machine power systems via pseudo-generalized Hamiltonian theory

引用

control ENGINEERING PRACTICE 2014年 29卷 147-157页

作者： Lei, Bangjun Fei, Shumin Southeast Univ Sch Automat Minist Educ Key Lab Measurement & Control Complex Syst Engn Nanjing 210096 Jiangsu Peoples R China Guizhou Inst Technol Elect Engn Coll Guiyang 550003 Peoples R China

nonlinear robust control of static synchronous series compensator (SSSC) is investigated in multi-machine multi-load power systems by using the pseudo-generalized Hamiltonian method. First, the uncertain nonlinear differential algebraic equation model is constructed for the power system. Then, the dissipative pseudo-generalized Hamiltonian realization of the system is established by means of variable transformation and prefeedback control. Finally, based on the obtained dissipative pseudo-generalized Hamiltonian realization, a brand new nonlinear robust controller is put forward. The proposed controller can effectively use the internal structure and the energy balance property of the power system. Simulation results demonstrate the effectiveness and robustness of the control scheme. (C) 2014 Elsevier Ltd. All rights reserved.

关键词： Pseudo-generalized Hamiltonian function method Uncertain nonlinear differential algebraic system Multi-machine power systems SSSC Pseudo-generalized Hamiltonian realization nonlinear robust control

来源：评论

学校读者我要写书评

暂无评论

Decentralized nonlinear robust control of UAVs in close formation

引用

INTERNATIONAL JOURNAL OF robust AND nonlinear control 2003年第11期13卷 1057-1078页

作者： Singh, SN Zhang, R Chandler, P Banda, S Univ Nevada Dept Elect & Comp Engn Las Vegas NV 89154 USA USAF Res Lab VACA Wright Patterson AFB OH 45433 USA

This paper treats the design of a decentralized nonlinear robust control system for formation flying of multiple unmanned aerial vehicles (UAVs). In close formation, it is assumed that vortex of any UAV affects the motion of all the UAVs behind it. The forces produced by these vortices are complex functions of relative position co-ordinates of the UAVs. In this paper, these forces are treated as unknown functions, which cannot be parameterized. Since the system is not invertible in the wind axes system, a simplified coordinate system obtained from the wind axes system for which the velocity roll (bank angle) is zero, is considered for the design of the control system. A nonlinear robust control system for the separation trajectory control of the wing aircraft in the simplified wind coordinate system is derived. Uncertain functions and unmeasured variables are estimated using a high-gain observer for the synthesis of the control system. Each wing UAV synthesizes its control law using its own state variables and the relative position of the preceding UAV with respect to the wing UAV. Thus the control system is decentralized since each UAV has to communicate (depending on sensors for position measurement) with at most one (preceding) UAV, and no data transmission from the remaining vehicles is required. Simulation results for two UAVs are presented which show precise separation trajectory control of each wing UAV in spite of the presence of unknown and unstructured vortex forces, while the lead aircraft maneuvers. Furthermore, these results confirm that when the wing aircraft is positioned properly in the vortex of the lead aircraft, it experiences reduction in its required flight power. Copyright (C) 2003 John Wiley Sons, Ltd.

关键词： control of UAVs formation flying nonlinear robust control decentralized control

来源：评论

学校读者我要写书评

暂无评论

nonlinear robust control of An Open-Channel Hydraulic System Based on An Infinite-Dimensional Model

引用

IFAC Proceedings Volumes 2000年第16期33卷 427-432页

作者： Mei-ling Chen Didier Georges Laboratoire d’Automatique de Grenoble Saint-Martin-d’Heres Cedex B.P.46-38402 France Tel.: +(33)04.76.82.62.37 fax: +(99)04.76.82.69.88.

A nonlinear robust controller is presented for the minimization of water level deviation in presence of disturbances in an one-reach open channel controlled by an underflow gate at the upstream end. To apply nonlinear robust control to this distributed parameter system, the original nonlinear partial differential equations (the Saint-Venant equations) were adopted without using neither linearization nor discretization. We have defined an infinite-dimensional Hamilton-Jacobi equation and modified an algorithm proposed for solving open loop constrained minimax problem to the infinite-dimensional case.

关键词： nonlinear robust control distributed parameter systems open-channel hydraulic systems

来源：评论

学校读者我要写书评

暂无评论

Study on nonlinear robust control for Permanent Magnet Linear Servo System

Study on Nonlinear Robust Control for Permanent Magnet Linea...

引用

International Conference on Manufacturing Science and Technology (ICMST 2011)

作者： Lan, Yipeng Lan, Hongxuan Zhao, Hui Shenyang Univ Technol Sch Elect Engn Shenyang Peoples R China

ISBN: (纸本)9783037852958

nonlinear robust controllers were proposed for permanent magnet linear servo system. In order to reach accurate track of the motor speed and current, an error system dynamic equation based on the motor nonlinear mathematical model was established. The track and disturbance suppression was summed up the design of nonlinear (H infinity) robust controllers. Two theories used in describing nonlinear (H infinity) robust controllers were obtained by defining proper storage function. The equations of nonlinear (H infinity) robust controllers which met disturbance suppression and asymptotical stability were proved. The results of simulation test indicate that the linear servo system with nonlinear (H infinity) robust controllers can guarantee disturbance suppression and the tracks of input signal.

关键词： linear motor servo system nonlinear robust control disturbance restraint asymptotical stability

来源：评论

学校读者我要写书评

暂无评论

New nonlinear robust control Method Based on the State Extending and Filtering Estimation 4

New Nonlinear Robust Control Method Based on the State Exten...

引用

4th International Conference on Information Science and control Engineering (ICISCE)

作者： Gu, Zhifeng Wang, Yutong Li, Baochen Wang, Huiyong Shijiazhuang Tiedao Univ Sch Elect & Elect Engn Shijiazhuang Hebei Peoples R China Mech Engn Coll Vehicle & Elect Dept Shijiazhuang Hebei Peoples R China Hebei Univ technol Informat Coll Shijiazhuang Hebei Peoples R China

ISBN: (纸本)9781538630136

In this paper, the state extending and filtering robust control (SEFERC) is proposed and investigated. In the SEFERC, the uncertain nonlinear part of the MIMO is extend to the new state parameter and estimated by the nonlinear tracking filter. With the estimated value, by the direct feedback linearization (DFL) method and He control method, the nonlinear system can be converted to the linear system and stabilized with the robust control theory. Taking the certain excitation and speed synthetic control system for example, simulation results show that the SEFERC can accelerate the convergence speed of the state variables and improve the excitation and speed control speed.

关键词： MIMO system Multi uncertain parameters State extending Tracking filter nonlinear robust control State parameter estimation

来源：评论

学校读者我要写书评

暂无评论

nonlinear robust control of a Levitation System with Hybrid Electromagnets

Nonlinear Robust Control of a Levitation System with Hybrid ...

引用

IEEE Annual Conference on Decision and control

作者： Beytullah Okur Erkan Zergeroglu Kadir Erkan Department of Electronics Engineering Gebze Institute of Technology 41400 Gebze Kocaeli Turkey Department of Computer Engineering Gebze Institute of Technology 41400 Gebze Kocaeli Turkey Department of Mechatronics Engineering Yildiz Technical University 34349 Besiktas Istanbul Turkey

ISBN: (纸本)9781479978878

In this study;we present a model based robust controller for a one degree-of-freedom magnetic levitation system with hybrid electromagnets. nonlinear equations of the magnetic force model have been used to develop the model based controller. The proposed controller can handle parametric uncertainties and only requires air gap and coil current measurements. The output of the controller is the voltage input of the coils and back-stepping procedure have been applied to reach the voltage dynamics over current dynamics. The stability and convergence of the closed loop system have been proved via Lyapunov-type arguments. Simulation results are presented to illustrate the performance of the proposed robust controller.

关键词： Magnetic levitation systems robust controllers Electromagnets nonlinear robust control controllers output controller Closed loop systems Magnetic force

来源：评论

学校读者我要写书评

暂无评论

Integrated nonlinear robust adaptive control for active front steering and direct yaw moment control systems with uncertainty observer

引用

TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND control 2020年第16期42卷 3267-3280页

作者： Zhang, Jiaxu Zhou, Shiying Li, Fengjun Zhao, Jian China FAW Grp Co Ltd Intelligent Network R&D Inst 1 Xinhongqi St Changchun 130022 Peoples R China Jilin Univ State Key Lab Automot Simulat & Control Changchun Peoples R China

This paper presents an integrated nonlinear robust adaptive controller with uncertainty observer for active front wheel steering system and direct yaw moment control system. First, an integrated vehicle chassis control model is established as the nominal model with the additive and multiplicative uncertainties of the system. Secondly, an integrated nonlinear robust adaptive control law with the additive uncertainty observer is designed via Lyapunov stability theory to calculate the corrective yaw moment, and an adaptive law is designed based on projection correction method to online estimate and compensate the multiplicative uncertainty of the system. Then, the constrained optimal allocation problem of the corrective yaw moment is transformed into the nonlinear optimization problem, and the sequential quadratic programming method is used to solve the nonlinear optimization problem to coordinate active front wheel steering system and direct yaw moment control system. Finally, the performance of the proposed integrated nonlinear robust adaptive controller is verified via vehicle dynamics simulation software.

关键词： Integrated vehicle chassis control nonlinear robust control uncertainty observer adaptive control constrained optimal allocation

来源：评论

学校读者我要写书评

暂无评论

Indirect nonlinear robust control of Robot Manipulators

Indirect Nonlinear Robust Control of Robot Manipulators

引用

American control Conference

作者： Hejia Pan Ming Xin Department of Electrical and Computer Engineering Mississippi State University Starkville MS 39762 Department of Mechanical and Aerospace Engineering University of Missouri Columbia MO 65211

ISBN: (纸本)9781479932757

In this paper, a new robust control strategy to accomplish the precise control of robot manipulators under load uncertainty is proposed using a nonlinear optimal control formulation and solution. This approach is based on the underlying relation between the robust stability and performance optimality. A class of robust control problems can be transformed to an equivalent optimal control problem by incorporating the uncertainty bounds into the cost functional. The θ-D optimal control method is utilized to find an approximate closed-form feedback solution to the resultant nonlinear optimal control problem via a perturbation process. Numerical simulations show that the proposed robust controller is able to control the robot manipulator precisely under large load variations.

关键词： Robot Manipulator nonlinear robust control nonlinear optimal control robust controllers accuracy control robust stability Optimal control robust control strategy

来源：评论

学校读者我要写书评

暂无评论

nonlinear adaptive robust control for thyristor controlled series compensation

Nonlinear adaptive robust control for thyristor controlled s...

引用

6th World Congress on Intelligent control and Automation

作者： Li, Wenlei Liu, Shirong Jiang, Gangyi Geogi M., Dimirovski Ningbo Univ Sch Informat Sci & Engn Ningbo 315211 Zhejiang Peoples R China Dogus Univ Acibadem Fac Engn TR-34722 Istanbul Turkey

ISBN: (纸本)1424403316

The backstepping design methodology of the nonlinear control theory is known to provide an efficient controller constructive tool for a wide range of systems engineering applications. Based on the nonlinear second-order model of single machine to infinite bus system employing thyristor controlled series compensation, a novel nonlinear adaptive robust controller is proposed by combining the backstepping method with Nussbaum gain function. The constant parameter uncertainty and the exogenous disturbances of the system are taken into consideration together in control design procedure, thus not only can the derived adaptive robust controller and parameter update law guarantee the closed-loop system globally uniformly ultimate bound, but also the desired performance can be achieved by an appropriate choice of design parameters. Simulation results demonstrate that the derived adaptive nonlinear controller owns superior robustness and adaptability.

关键词： power systems thyristor controlled series compensation nonlinear robust control parameter uncertainty external disturbances backstepping method Nussbaum gain

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：