检索结果-内蒙古大学图书馆

control of a grinding mill circuit using fractional order controllers

JOURNAL OF PROCESS control 2017年 53卷 80-94页

作者： Aguila-Camacho, Norelys Le Roux, Johan D. Duarte-Mermoud, Manuel A. Orchard, Marcos E. Univ Chile Dept Elect Engn Fac Math & Phys Sci Av Tupper 2007 Santiago Chile Adv Min Technol Ctr Av Tupper 2007 Santiago Chile Univ Pretoria Dept Elect Elect & Comp Engn Pretoria South Africa

This paper presents the design and application of fractional single-input-single-output (SISO) controllers to a grinding mill circuit, which is a multiple-input-multiple-output (MIMO) process. Two kinds of controllers are presented: fractional order proportional-integral (FOPI) controllers, and a combination of FOPI and fractional order model reference adaptive controllers (FOMRAC). The parameters of the controller are tuned using off-line particle swarm optimization. In the presence of disturbances and process noise, the SISO fractional controllers achieve similar or better performance compared to linear model predictive control (LMPC). (C) 2017 Elsevier Ltd. All rights reserved.

关键词： Fractional order controllers model reference adaptive control Grinding mill circuit Particle swarm optimization Process control Comminution

来源：评论

学校读者我要写书评

暂无评论

Finite-Time Fault-Tolerant Spacecraft Attitude control with Torque Saturation

引用

JOURNAL OF GUIDANCE control AND DYNAMICS 2017年第10期40卷 2524-2537页

作者： Hu, Qinglei Tan, Xiao Akella, Maruthi R. Beihang Univ Sch Automat Sci & Elect Engn Beijing 100191 Peoples R China Univ Texas Austin Dept Aerosp Engn & Engn Mech Engn Austin TX 78712 USA

A smooth attitude-stabilizing controller is proposed for rigid spacecraft actuated by thrusters that achieves finite-time stability in the presence of external disturbance, input saturation, and inertia uncertainty. More specifically, a novel time-varying fast terminal sliding-mode surface is first developed in conjunction with a judiciously designed control signal that rigorously obeys a known maximum-torque constraint. The controller can be viewed as a continuous analog to a variable structure approach, with the smoothness of the control permitted to vary with time according to a set of user-defined parameters. The second major contribution is that the control algorithm is extended to accommodate actuator faults while making use of the remaining active actuating capabilities. A Lyapunov-based analysis of the proposed formulation is provided, and finite-time stability of the closed-loop system is guaranteed. Numerical simulation studies are presented to help illustrate the desirable properties of the controller whenever certain design parameters are selected appropriately, and guidelines for selecting those parameters are provided in depth.

关键词： Spacecraft Attitude model reference adaptive control Actuators Numerical Simulation control Algorithm Rigid Spacecraft Attitude control System Fault Detection and Diagnosis Mathematical models Spacecraft control

来源：评论

学校读者我要写书评

暂无评论

Dynamic Rig for Validation of control Algorithms at High Angles of Attack

引用

JOURNAL OF AIRCRAFT 2017年第5期54卷 1760-1771页

作者： Ignatyev, Dmitry I. Sidoryuk, Maria E. Kolinko, Konstantin A. Khrabrov, Alexander N. TsAGI Flight Dynam & Control Syst Dept 1 Zhukovsky St Moskovskaya Oblast 140180 Russia TsAGI Unsteady Aerodynam Div Dynam & Control Syst Dept 1 Zhukovsky St Moskovskaya Oblast 140180 Russia

The dynamics of a modern aircraft at high angles of attack is complicated, with hazardous phenomena such as wing rock, stall, and spin. The paper presents a technique for cost-effective and safe studying of conventional and critical flight regimes and control validation using an autonomous scaled aircraft model mounted in a three-degree-of-freedom gimbal in a wind tunnel. The similarity of the dynamics at high angles of attack of the wind-tunnel model and the free-flying model is demonstrated. To suppress the wing rock and to prevent the stall, two control laws are designed using linear matrix inequalities and model reference adaptive control techniques. The controllers are tested in a semifree flight of the autonomous scaled model in the wind tunnel. Wing rock suppression and stall and spin prevention are demonstrated.

关键词： HIGH ANGLES High angle of attack Wind Aircraft models scale models dynamics wing rock model reference adaptive control Computer algorithms ANGLE OF ATTACK

来源：评论

学校读者我要写书评

暂无评论

A Novel Direct model reference Fuzzy control Approach Based on Observer and Its Applications

引用

IFAC-PapersOnLine 2016年第13期49卷 318-323页

作者： Khanesar, Mojtaba Ahmadieh Faculty of Electrical and Computer Engineering Semnan University Semnan Iran

This paper aims to introduce a novel direct model reference fuzzy control approach based on observer for nonlinear systems, expressed in the form of a Takagi Sugeno (TS) fuzzy model. Based on this model, a direct model reference fuzzy controller based on adaptive observer is developed to deal with external disturbances. Compared with the adaptive observer based on TS fuzzy control model, the proposed method is robust in the existence of bounded external disturbances and it is capable of tracking a reference signal rather than just regulation. In addition the proposed algorithm does not necessitate the existence of plant parameter estimator any more. The proposed method is then validated on the control of Chua's circuit and it is shown that it is capable of controlling this chaotic system with high performance. © 2016

关键词： model reference adaptive control Chaotic systems Fuzzy control adaptive Approximation adaptive control adaptive observer External disturbances Observers reference signals T S fuzzy control Takagi sugeno fuzzy models

来源：评论

学校读者我要写书评

暂无评论

Task space consensus in networks of heterogeneous and uncertain robotic systems with variable time-delays

引用

INTERNATIONAL JOURNAL OF adaptive control AND SIGNAL PROCESSING 2017年第6期31卷 917-937页

作者： Nuno, Emmanuel Aldana, Carlos I. Basanez, Luis Univ Guadalajara UdG Dept Comp Sci DCC Guadalajara Jalisco Mexico Tech Univ Catalonia UPC Inst Ind & Control Engn IOC Barcelona Spain

This work deals with the leader-follower and the leaderless consensus problems in networks of multiple robot manipulators. The robots are non-identical, kinematically different (heterogeneous), and their physical parameters are uncertain. The main contribution of this work is a novel controller that solves the two consensus problems, in the task space, with the following features: it estimates the kinematic and the dynamic physical parameters;it is robust to interconnecting variable-time delays;it employs the singularity-free unit-quaternions to represent the orientation;and, using energy-like functions, the controller synthesis follows a constructive procedure. Simulations using a network with four heterogeneous manipulators illustrate the performance of the proposed controller. Copyright (c) 2016 John Wiley & Sons, Ltd.

关键词： adaptive control model reference adaptive control time-delays multi-agent systems

来源：评论

学校读者我要写书评

暂无评论

adaptive Decoupling of Nonideal Machine and Sensor Properties for Extraction of Fine Details When Using the Motor Drive as a Diagnostic Sensor

引用

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 2017年第3期53卷 2925-2935页

作者： Secrest, Caleb W. Lorenz, Robert D. Gen Motors Global Prop Syst Pontiac MI 48340 USA Univ Wisconsin Dept Mech Engn Madison WI 53706 USA

This paper presents methods to enhance the quality of spatial information that can be extracted when using the motor drive as a diagnostic sensor. When using the state-of-the-art motor drive-based techniques for extracting spatial information related to the state of wear in a gear train driven by an ac machine, position sensor-induced periodic position measurement errors and machine-induced spatial harmonic torque ripple can degrade the quality and the detail of the information that can be extracted. In this work, this degradation of information is displayed experimentally, and it is demonstrated that the quality of the spatial information extracted can be significantly improved through implementation of existing model reference adaptive system (MRAS)based nonideal sensor property decoupling techniques and newly developed MRAS-based spatial harmonic torque ripple decoupling techniques. Furthermore, it is identified and demonstrated in this work that by removing the gear mesh harmonic component from the gear wear information extracted using the state-of-the-art techniques, and then calculating the spatial rate of change of this new information, a new signal is generated that strongly correlates to local gear tooth defects in a gear train driven by an ac machine.

关键词： AC motor drives fault diagnosis gears kinematics model reference adaptive control position measurement torque control

来源：评论

学校读者我要写书评

暂无评论

model reference adaptive control with Inverse Compensation Applied to a pH Plant

Model Reference Adaptive Control with Inverse Compensation A...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Vale, Marcelo R. B. G. Fonseca, Daniel G. V. Pereira, Kalinne R. C. Maitelli, Andre L. Araujo, Fabio M. U. Casillo, Danielle S. S. Univ Fed Rio Grande do Norte Dept Comp Eng & Automat Automat Lab Oil BR-59072970 Natal RN Brazil Rural Fed Univ Semi Arid Dept Exact Sci & Nat Mossoro RN Brazil

ISBN: (纸本)9781424463916

In this paper, the model reference adaptive control (MRAC) with dead-zone compensation is proposed to improve two MRAC variations: MRAC with fixed adaptive gain (gamma) and MRAC with variable gamma based on eta-adaptive optimization algorithm. The proposed MRAC is often used to compensate the dead-zone effect on valve that is not taken into consideration in the usual MRAC. It was also implemented a compensation in inverse dynamic on dead-zone. The nonlinearity inverse model is estimated by method of Recursive Least Squares (RLS). All comparisons and validations were made based on results collected from a simulation and developed in accordance with two models: a simplified Hammerstein model and a phenomenological model of Wiener. To verify the proposed controllers with inverse compensation performance we applied to a pH neutralization process. Simulations have been presented to confirm the effectiveness of the technique.

关键词： Î·-adaptive optimization Hammerstein model dead-zone compensation inverse compensation least squares approximations model reference adaptive control model reference adaptive control systems optimisation pH pH neutralization process pH plant recursive least squares

来源：评论

学校读者我要写书评

暂无评论

Lyapunov based two-stage robust model reference adaptive controller for linear plants with time varying bounded uncertainties

引用

IFAC-PapersOnLine 2016年第1期49卷 213-218页

作者： Chakrabarty, Adhish Kr. Bhattacharya, Samar Dept. of Applied Electronics and Instrumentation Engineering Guru Nanak Institute of Technology Kolkata-114 India Electrical Engineering Department Jadavpur University Kolkata-32 India

A robust model reference adaptive controller (MRAC) is developed for linear plants with bounded structured uncertainties. The control rule is implemented in two stages to achieve robustness and state tracking and output tracking. In the first stage, state tracking is achieved and after that, in the second stage, output tracking is achieved. Output error identification is used to estimate the bounded uncertainties associated with state matrix, input matrix and output matrix. The control rules are based on these estimates of uncertainties. All the states are assumed to be available for measurement and the estimates of the uncertainties are proved to converge to their actual values. Lyapunov's method is used to achieve bounded signals. Simulation results for a plant with different types of structured uncertainty show the effectiveness of the present method. © 2016, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： model reference adaptive control controllers Linear systems Lyapunov methods Matrix algebra Robustness (control systems) Uncertainty analysis Bounded uncertainty Lyapunov's methods Output error identification Output tracking Robust model reference adaptive controllers State tracking Structured uncertainties Uncertainty

来源：评论

学校读者我要写书评

暂无评论

Distributed adaptive switching consensus control of heterogeneous multi-agent systems with switched leader dynamics

引用

NONLINEAR ANALYSIS-HYBRID SYSTEMS 2017年 26卷 274-283页

作者： Yuan, Chengzhi Univ Rhode Isl Dept Mech Ind & Syst Engn Kingston RI 02881 USA

In this paper, the leader-following distributed consensus control problem is addressed for general linear multi-agent systems with heterogeneous uncertain agent dynamics and switched leader dynamics. Different from most existing results with a single linear timeinvariant (LTI) leader dynamics, the leader dynamics under consideration is composed by a family of LTI models and a switching logic governing the switches among them, which is capable of generating more diverse and sophisticated reference signals to accommodate more complicated consensus control design tasks. A novel distributed adaptive switching consensus protocol is developed by incorporating the model reference adaptive control mechanism and arbitrary switching control technique, which can be synthesized by following a two-layer hierarchical design scheme. A numerical example has been used to demonstrate the effectiveness of the proposed approach. (C) 2017 Elsevier Ltd. All rights reserved.

关键词： Multi-agent systems model reference adaptive control Switched systems

来源：评论

学校读者我要写书评

暂无评论

Design, analysis and modelling of a hybrid controller for serial robotic manipulators

引用

ROBOTICA 2017年第9期35卷 1888-1905页

作者： Zhang, Dan Wei, Bin York Univ Dept Mech Engn 4700 Keele St Toronto ON M3J 1P3 Canada Univ Ontario Inst Technol Fac Engn & Appl Sci 2000 Simcoe St North Oshawa ON L1H 7K4 Canada

When the end-effector of a robotic arm grasps different payload masses, the output of joint motion will vary. By using a model reference adaptive control approach, the payload variation effect can be solved. This paper describes the design for a hybrid controller for serial robotic manipulators by combining a PID controller and a model reference adaptive controller (MRAC) in order to further improve the accuracy and joint convergence speed performance. The convergence performance of the PID controller, the MRAC and the PID+MRAC hybrid controller for 1-DOF, 2-DOF and subsequently 3-DOF manipulators is compared. The comparison results show that the convergence speed and its performance for the MRAC and the PID+MRAC controllers is better than that of the PID controller, and the convergence performance for the hybrid control is better than that of the MRAC control.

关键词： Robotic manipulator model reference adaptive control Hybrid control Convergence performance

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：