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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Anderle, Milan Čelikovský, Sergej Czech Technical University in Prague Faculty of Electrical Engineering Department of Control Engineering Technická 2 Prague166 27 Czech Republic Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Pod Vodárenskou věží 4 Prague182 08 Czech Republic

ISBN: (纸本)9783902823625

Underactuated mechanical systems are systems with less actuators than degrees of freedom. Therefore, it is complicated to measure all states, i.e. angular positions or angular velocities, of the mechanical system. Alternative solution consists in an observer design such that unmeasurable states are estimated. For this purpose, a high gain observer for an Acrobot was introduced. By virtue of an Acrobot embedding into a 4-link model, the high gain observer was simply extended and applied to the 4-link model. The main aim of this paper consists in a coupling of a method of the Acrobot embedding into the 4-link model and the high gain observer design for the Acrobot. The coupling results in an observer for the 4-link model with the same structure as the already developed high gain observer for the Acrobot model. The control of the 4-link model using the embedding method is based on a definition of constraining functions for knees control whereas the remaining angle in the hip is controlled in the same way as it would be an Acrobot's angle. The ability of feedback tracking of the walking-like trajectory of the 4-link with observed geometry during a swing phase of a single step is demonstrated in simulations. © IFAC.

关键词： Mechanical actuators

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Three-dimensional Path Planning for Unmanned Aerial Vehicles Based on Fluid Flow

Three-dimensional Path Planning for Unmanned Aerial Vehicles...

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IEEE Aerospace Conference

作者： Xiao Liang Honglun Wang Dawei Li Chang Liu Science and Technology on Aircraft Control Laboratory Department of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781479916191

Using the principles of fluid mechanics for flow around objects, a three dimensional (3D) path planning method for unmanned aerial vehicles (UAVs) in complex environments is studied. As a potential field method, it theoretically guarantees to avoid local minima with smooth paths and the modeling of environment is simple. First, an analytical solution is derived to determine the steady 3D fluid flow acting on a single spherical obstacle. Subsequently, an interpolation function is introduced to multiple obstacles avoidance. Finally, the maneuverability constraints of the UAV are imposed and flight paths are obtained. Added the effect of human factors, a Generalized Fuzzy Competitive Neural Network (G-FCNN) is proposed to evaluate the flight paths. In simulation, the path is smoother and more reasonable. In terms of evaluation, G-FCNN could considerate multiple factors and the result is satisfied.

关键词： FLIGHT PATHS Unmanned Aerial Vehicle fluid flow Path planning drone honey bees vehicle Human factors fluid mechanics interpolation function field methods Flow around objects

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Regional Stabilization of Continuous-Time Systems with Saturated Quantizer and Packet Dropouts

Regional Stabilization of Continuous-Time Systems with Satur...

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第三十三届中国控制会议

作者： Zhiqiang Zuo Dianjie Ma Yijing Wang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479947249

This paper addresses the problem of regional stabilization of NCSs in continuous-time form subject to state constraints,saturated quantizer and packet dropouts. Different from the previous results based on quadratic stability, a state feedback uniform quantizer is designed via the non-quadratic Lyapunov functional approach. To achieve such an objective, the saturated quantizer is decomposed into two parts, a saturation function and a uniformly bounded disturbance. A polytopic representation of the saturation function is utilized, which builds the foundation on the construction of the non-quadratic Lyapunov functional. The designed controller is obtained through the solutions of some matrix inequalities. A numerical example is given to demonstrate the effectiveness of our results.

关键词： Regional stabilization,Saturated quantizer,Packet dropouts,Non-quadratic Lyapunov functional

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Analysis of the impact of translating cowl on hypersonic vehicle performance

Analysis of the impact of translating cowl on hypersonic veh...

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第26届中国控制与决策会议

作者： Liqian Dou Yuye Shen Ran Ji School of Electrical Engineering & Automation the Tianjin Key Laboratory of Process Measurement and ControlTianjin University

For the power plant of hypersonic vehicle – scramjet, this work mainly studies the effects of the translating cowl of inlet on the static and dynamic performance of the hypersonic vehicle. The results indicate that the effects of the cowl on lift and drag can be negligible, while the effects of the cowl on thrust and pitching moment are significant. The cowl makes thrust-drag ratio bigger and the accelerated conditions corresponding angle of attack range larger. The cowl increases the degree of flexible deformation, but in total this effects can be negligible. For the balance states, the elevator deflection angle needed becomes bigger to offset the additional pitching moment;a smaller angle of attack and stoichiometrically normalized fuel equivalence ratio(FER) needed generate enough thrust to reach a certain speed and height, thereby the flight left margin considering viscous is expanded. The article also analyzes the effects of a translating cowl on open-loop poles and zeros of the typical transfer function of the linear model, and found the RHP unstable zeros was away from the imaginary axis, the flight control system bandwidth limit can be slightly widened. This article provides the basis theoretical study for further controller design of the hypersonic vehicle.

关键词： translating cowl of inlet thrust-drag ratio structure flexible zero-pole point flying boundary

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Intra-plant reactive power-voltage control: Practices, drawbacks and challenges

Intra-plant reactive power-voltage control: Practices, drawb...

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IEEE General Meeting Power& Energy Society

作者： Jasna Dragosavac Žarko Janda Dušan Arnautović Selma Awadallah J. V. Milanović Automation and Control Dept. Electrical Engineering Institute “Nikola Tesla” Belgrade Serbia School of Electrical and Electronic Engineering The University of Manchester Manchester UK

The paper discusses reactive power-voltage (Q-V) control in a multi-machine steam power plant (SPP). After briefly introducing some of the basic characteristics of synchronous generator's voltage control through automatic voltage regulators, the practices of widely applied manual voltage references setting for Q-V control in SPP is illustrated through several examples of SPP response recorded at site. Further the case studies were developed with the emphasis on the drawbacks of manual intra-plant Q-V control by building a mathematical model of realistic SPP in Matlab-Simulink. Relying on noticed drawbacks the paper highlights the requirements for enhancing SPP reactive power response and voltage support to the power system by coordinated Q-V control at power plant level. Finally, the paper illustrates the achieved performances of coordinated Q-V controller in real SPP.

关键词： Reactive power Power generation Solids Power system stability Generators Automatic voltage control

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Generalized synchronization of nonlinear chaotic systems through natural bioinspired controlling strategy

Abstract and Applied Analysis

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Abstract and Applied Analysis 2015年第1期2015卷

作者： Li, Shih-Yu Chen, Shi-An Lin, Chin-Teng Ko, Li-Wei Yang, Cheng-Hsiung Chen, Heng-Hui Brain Research Center National Chiao Tung University Hsinchu Taiwan Department of Electrical and Computer Engineering National Chiao Tung University Hsinchu Taiwan Department of Biological Science and Technology National Chiao Tung University 1001 Ta Hsueh Road Hsinchu 300 Taiwan Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taipei Taiwan Department of Mechanical Engineering Hsiuping University of Science and Technology Taichung Taiwan

A novel bioinspired control strategy design is proposed for generalized synchronization of nonlinear chaotic systems, combining the bioinspired stability theory, fuzzy modeling, and a novel, simple-form Lyapunov control function design of derived high efficient, heuristic and bioinspired controllers. Three main contributions are concluded: (1) apply the bioinspired stability theory to further analyze the stability of fuzzy error systems;the high performance of controllers has been shown in previous study by Li and Ge 2009, (2) a new Lyapunov control function based on bioinspired stability theory is designed to achieve synchronization without using traditional LMI method, which is a simple linear homogeneous function of states and the process of designing controller to synchronize two fuzzy chaotic systems becomes much simpler, and (3) three different situations of synchronization are proposed;classical master and slave Lorenz systems, slave Chen's system, and Rossler's system as functional system are illustrated to further show the effectiveness and feasibility of our novel strategy. The simulation results show that our novel control strategy can be applied to different and complicated control situations with high effectiveness. © 2015 Shih-Yu Li et al.

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Online Contribution Rate Based Fault Diagnosis for Nonlinear Industrial Pro cesses

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自动化学报 2014年第3期40卷 423-430页

作者： PENG Kai-Xiang ZHANG Kai LI Gang Key Laboratory for Advanced Control of Iron and Steel Process School of Automation and Electrical Engineering University of Sci-ence and Technology Beijing Beijing 100083 China Depart-ment of Automation Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing 100084 China

在过去的十年，核主管部件分析(KPCA ) 在监视区域的数据驱动的过程相当流行地出现了。庞大的工作被做了显示出它的简洁，可行性，和有效性。然而，核诡计的介绍使直接为差错诊断采用传统的贡献阴谋不可能。在这份报纸，根据重游并且分... 详细信息

在过去的十年，核主管部件分析(KPCA ) 在监视区域的数据驱动的过程相当流行地出现了。庞大的工作被做了显示出它的简洁，可行性，和有效性。然而，核诡计的介绍使直接为差错诊断采用传统的贡献阴谋不可能。在这份报纸，根据重游并且分析存在， KPCA 相关的诊断来临，新贡献率基于方法被建议它能清楚地解释有缺点的变量。而且，为联机非线性的诊断的一个计划被建立。最后，连续搅动的坦克反应堆(CSTR ) 上的案例研究基准被使用存取新方法论的有效性，在有传统的线性方法的比较也被包含的地方。

关键词：故障诊断非线性搅拌釜式反应器工业费率核主成分分析 KPCA 数据驱动

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Drag-free control for cold air thrusters based on variable universe adaptive fuzzy PID

Drag-free control for cold air thrusters based on variable u...

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International Conference on Information and automation (ICIA)

作者： Xudong Wang Jun Long Qiao Zhu Jiarui Cui Institute of Beijing Control Engineering Beijing China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China

Cold air micro-thruster is a multi-variable, nonlinear, strong coupling system. The traditional control method is vulnerable to uncertain factors such as the satellite parameters change and load disturbance. It is difficult to obtain satisfactory control effect. This paper puts forward an adaptive variable universe fuzzy PID compound control strategy, control parameters is realized by using fuzzy control and variable region since the setting and control rules of self-adjustment. Apply it to the drag-free control of cold air thrusters based on the micro-thrust loop, the results show that the method has fast dynamic response, strong anti-interference ability and robustness, etc.

关键词： Satellites Valves PD control Error analysis Niobium Robustness

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Chaotic Artificial Bee Colony Optimization Approach to Aircraft Automatic Landing System

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IFAC Proceedings Volumes 2014年第3期47卷 876-881页

作者： Qinan Luo Haibin Duan Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University(BUAA) Beijing 100191 PR CHINA

This paper presents an aircraft Automatic Landing System (ALS) that uses Chaotic Artificial Bee Colony (CABC) optimization. Analysis of aircraft landing process and wind disturbance are provided. The couple behavior between the thrust and the elevator during automatic landing is also investigated. A vertical rate referenced guidance system and an angle of attack referenced Approach Power Compensation System (APCS) are developed and evaluated for use in automatic landing. CABC optimization techniques are applied to calculate a set of optimal filter parameters and control gains for the entire closed-loop control system. A series of comparative experimental results verified the feasibility and effectiveness of our proposed approach.

关键词： Automatic Landing System (ALS) Approach Power Compensation System (APCS) Wind disturbance Chaotic Artificial Bee Colony (CABC) Optimization

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A new pricing scheme for controlling energy storage devices in smart grid

A new pricing scheme for controlling energy storage devices ...

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2014 American control Conference, ACC 2014

作者： Zhu, Jingwei Chen, Michael Z. Q. Zuo, Zhiqiang Du, Baozhu Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign Champaign IL 61820 United States Department of Mechanical Engineering University of Hong Kong Hong Kong Hong Kong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China School of Automation Nanjing University of Science and Technology Nanjing China HKU Shenzhen Institute of Research and Innovation China

ISBN: (纸本)9781479932726

Improvement of the overall efficiency of energy infrastructure is one of the main anticipated benefits of the deployment of smart grid technology. Advancement in energy storage technology and two-way communication in the electric network are indispensable components to achieve such a vision, while efficient pricing schemes and appropriate storage management are also essential. In this paper, we propose a novel pricing scheme which permits one to indirectly control the energy storage devices in the grid to achieve a more desirable aggregate demand profile that meets a particular target of the grid operator such as energy generation cost minimization and carbon emission reduction. Such a pricing scheme can potentially be applied to control the behavior of energy storage devices installed for integration of intermittent renewable energy sources that have permission to grid connection and will have broader applications as an increasing number of novel and low-cost energy storage technologies emerge. © 2014 American Automatic control Council.

关键词： Smart power grids

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