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

作者： Ma, Chao Wu, Jing Li, Ning Li, Shaoyuan Li, Kang Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai China School of Electronics Electrical Engineering and Computer Science Queen's University Belfast United Kingdom

ISBN: (纸本)9783902823625

As one of key technologies in photovoltaic converter control, Maximum Power Point Tracking (MPPT) methods can keep the power conversion efficiency as high as nearly 99% under the uniform solar irradiance condition. However, these methods may fail when shading conditions occur and the power loss can over as much as 70% due to the multiple maxima in I-P curve in shading conditions v.s. single maximum point in uniformly solar irradiance. In this paper, a Real Maximum Power Point Tracking (RMPPT) strategy under Partially Shaded Conditions (PSCs) is introduced to deal with this kind of problems. An optimization problem, based on a predictive model which will change adaptively with environment, is developed to tracking the global maxima and corresponding adaptive control strategy is presented. No additional circuits are required to obtain the environment uncertainties. Finally, simulations show the effectiveness of proposed method. © IFAC.

关键词： Adaptive control systems

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Fuzzy Approach to H∞ Filtering for Delayed Nonlinear Stochastic Systems

Fuzzy Approach to H∞ Filtering for Delayed Nonlinear Stocha...

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第三十三届中国控制会议

作者： Ming Gao Li Sheng Weihai Zhang College of Electrical Engineering and Automation Shandong University of Science and Technology College of Information and Control Engineering China University of Petroleum (East China)

This paper is concerned with the infinite horizon H∞ filtering problem for nonlinear stochastic systems with timedelay. For general delayed nonlinear stochastic systems, the conditions of H∞ filtering are usually given in terms of HamiltonJacobi inequalities(HJIs), which are difficult to solve. In this paper, the delayed nonlinear stochastic systems are modeled based on the T-S fuzzy model. The exponential mean square H∞ filter of delayed nonlinear stochastic systems is proposed via solving a set of linear matrix inequalities(LMIs) instead of HJIs. A numerical example is presented to show the effectiveness of the proposed method.

关键词： H∞ filtering,nonlinear stochastic systems,time-delay,T-S fuzzy model,linear matrix inequalities.

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Design,Model and Attitude control of a Model-Scaled Gyroplane

Design,Model and Attitude Control of a Model-Scaled Gyroplan...

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2014中国制导、导航与控制学术会议

作者： Qing Lin ZhiHao Cai YingXun Wang School of Automation Science and Electrical Engineering and with Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing100191 China School of Automation Science and Electrical Engineering and with the Science and Technology on Aircraft Control LaboratoryBeihang UniversityBeijing100191 China UAV and advanced flight control

ISBN: (纸本)9781479946983

Autogyro or gyroplane as the first rotorcraft and a type of classical V/STOL aerial vehicle has become a hot point in academia and *** have been achieved in many research areas such as aerodynamics,structure,flight dynamics,modeling *** a sparse contemporary research on autogyro emphasizes the control of autogyro/*** motivation is to design an autopilot for an unmanned ***,the unmanned gyroplane was designed based on an advanced radio-controlled gyroplane and the PX4 open-source flight management ***,dynamics model was obtained through the CFD and aerodynamic estimation method.A fly-to-trim method was used to trim the aircraft and stability characteristics were analyzed at different ***,the attitude controller was designed with incremental nonlinear dynamic inversion method.

关键词： aerodynamics aircraft control attitude control autonomous aerial vehicles computational fluid dynamics control system synthesis helicopters nonlinear dynamical systems stability vehicle dynamics CFD PX4 open-source flight management unit V/STOL aerial vehicle advanced radio-controlled gyroplane aerodynamic estimation method attitude controller autogyro autopilot design dynamics model fly-to-trim method incremental nonlinear dynamic inversion method model-scaled gyroplane rotorcraft stability characteristics unmanned gyroplane vertical/short takeoff and landing aircraft Aerodynamics Aerospace electronics Atmospheric modeling Rotors Stability analysis Vectors Vehicle dynamics

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From Linear to Nonlinear Model Predictive control of a Building

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IFAC Proceedings Volumes 2014年第3期47卷 587-592页

作者： Matej Pčolka Eva Žáčeková Rush Robinett Sergej Čelikovský Michael Sebek Department of Control Engineering Faculty of Electrical Engineering of Czech Technical University in Prague Czech Republic Mechanical Engineering-Engineering Mechanics Michigan Technological University United States Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Czech Republic

In the building climate control area, the linear model predictive control (LMPC)—nowadays considered a mature technique—benefits from the fact that the resulting optimization task is convex (thus easily and quickly solvable). On the other hand, while nonlinear model predictive control (NMPC) using a more detailed nonlinear model of a building takes advantage of its more accurate predictions and the fact that it attacks the optimization task more directly, it requires more involved ways of solving the non-convex optimization problem. In this paper, the gap between LMPC and NMPC is bridged by introducing several variants of linear time-varying model predictive controller (LTVMPC). Making use of linear time-varying model of the controlled building, LTVMPC obtains predictions which are closer to reality than those of linear time invariant model while still keeping the optimization task convex and less computationally demanding than in the case of NMPC. The concept of LTVMPC is verified on a set of numerical experiments performed using a high fidelity model created in a building simulation environment and compared to the previously mentioned alternatives (LMPC and NMPC) looking at both the control performance and the computational requirements.

关键词： Predictive control adaptive control recursive identification

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Development of PLC based Process Loop control for Bottle Washer Machine

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Procedia Technology 2014年 14卷 365-371页

作者： Jaykumar Patel Alpeshkumar Patel Raviprakash Singh Scholar of M.Tech. Control & AutomationI&C Section Electrical Enginnering Department IT Nirma University Assistant Professor Instrumentiona and Control engineering Electrical Engineering Department IT Nirma University Assistant Manager KHS Machinary Private Limited Ahmedabad Gujarat India

In this paper we are presenting a process loop that can be used in bottle washer machine. It is a holistic approach. Because wherever a control of liquid is required, it can be used. It can be used in chemical and oil industries also. Water is used for washing purpose in bottle washer machine. Total three parameters are controlled ***, *** and *** etc. There is a very strong interaction in between these parameters. Pressure and flow are required to control for better washing. The aim is to maintain above listed variable by using programmable Logic controller (PLC). It increases efficiency and response time both. By modifying hardware this loop can use for bottle filler also. For that a valve is required at output side. Almost industry requirement is an output with safety. So, safety aspects are also considered in it. Different sensors and valves are used with PLC. They are controlled by a program. According to the program PLC generates different signals and valve is controlled. This way pressure, level and flow can control. As an extra feature a Human Machine Interface (HMI) is also connected. So, that user can change the set values directly.

关键词： Process Loop Pressure control Bottle Washer Flow control Level control Loop Safety Bottle Filler

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Hierarchical fuzzy control of multivariable systems via semi-tensor product method

Hierarchical fuzzy control of multivariable systems via semi...

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Chinese control Conference (CCC)

作者： Aidong Ge Yuzhen Wang Zhenbin Liu Ping Jiang School of Electrical Engineering and Automation Qilu University of Technology Jinan China School of Control Science and Engineering Shandong University Jinan Shandong CN

A new kind of scheme is proposed to obtain hierarchical fuzzy control of multivariable systems. It is based on algebraic fuzzy reasoning equations of fuzzy system using semi-tensor product framework recently described. First, the bi-decomposition of multivariable fuzzy systems is considered, and some new results are obtained. Using these results, the algorithm of hierarchical fuzzy systems realization is developed such that one can easily design the middle layers of the hierarchical structure. The resulting hierarchical system is totally equivalent to the conventional single layer fuzzy logic system. At last, an example is given to demonstrate that the algorithm is effective and feasible.

关键词： Equations Fuzzy control Mathematical model Fuzzy logic Input variables Matrix decomposition

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Finite-time stability and stabilization of It stochastic time-varying systems

Finite-time stability and stabilization of It stochastic t...

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第三十三届中国控制会议

作者： YAN Zhiguo ZHANG Weihai LIN Zhongwei School of Electrical Engineering and Automation Qilu University of Technology College of Electrical Engineering and Automation Shandong University of Science and Technology State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer EngineeringNorth China Electric Power University

This paper deals with the finite-time stability and stabilization for continuous-time linear stochastic time-varying systems. Several necessary and sufficient conditions and a sufficient condition for finite-time stability are derived. Moreover,a sufficient condition for the existence of state feedback controller is given. Such results involve the feasibility problems of differential linear matrix inequalities with terminal constraint.

关键词： Stochastic systems,time-varying systems,finite-time stability

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Transmission-mode ultrasonic measurement for gas bubble detection

Transmission-mode ultrasonic measurement for gas bubble dete...

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International Conference on Mechatronics and control (ICMC)

作者： Cong Xu Chao Tan Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin Tianjin CN Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin P.R. China

ISBN: (纸本)9781479925391

Non-invasive ultrasonic tomography is a practical solution of extracting cross-section information regarding the process of two-phase flow. For gas/water two-phase flow, the ultrasonic energy would be reflected about 99.94% at the gas/water interface due to the great differences between the acoustic impedance of water and gas. In this paper, the relations between pressure or voltage loss and bubble diameter has been studied by simulation results and experimental results, respectively by the ultrasonic transmission method. Both results showed that the transmission-mode measurement method has good resolution on the bubble diameter.

关键词： Acoustics Ultrasonic variables measurement Tomography Attenuation Impedance Real-time systems Acoustic measurements

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A NOVEL PIEZOELECTRIC IMMUNOSENSOR FOR EARLY CERVICAL CANCER DETECTION

A NOVEL PIEZOELECTRIC IMMUNOSENSOR FOR EARLY CERVICAL CANCER...

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2014年全国压电和声波理论及器件应用研讨会

作者： Li YANG Xianhe HUANGa Frequency Control Laboratory School of Automation & EngineeringUniversity of Electronic Science and Technology of China College of Electrical & Information Engineering Southwest University for Nationalities

Background,Motivation and Objective The quartz crystal microbalance(QCM)commonly configure with electrodes on both sides of a thin disk AT-cut *** study showed that the AT-cut quartz crystal could be electrically exci... 详细信息

关键词： Piezoelectric motor Single vibrator Bidirectional rotation Ultrasonic motor

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A discrete time-varying internal model-based approach for high precision tracking of a multi-axis servo gantry

A discrete time-varying internal model-based approach for hi...

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作者： Zhang, Zhen Yan, Peng Jiang, Huan Ye, Peiqing Department of Mechanical Engineering Tsinghua University Beijing100084 China Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment and Control Tsinghua University 100084 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Key Laboratory of High-efficiency and Clean Mechanical Manufacturing School of Mechanical Engineering Shandong University Jinan Shandong250061 China

In this paper, we consider the discrete time-varying internal model-based control design for high precision tracking of complicated reference trajectories generated by time-varying systems. Based on a novel parallel time-varying internal model structure, asymptotic tracking conditions for the design of internal model units are developed, and a low order robust time-varying stabilizer is further synthesized. In a discrete time setting, the high precision tracking control architecture is deployed on a Voice Coil Motor (VCM) actuated servo gantry system, where numerical simulations and real time experimental results are provided, achieving the tracking errors around 3.5‰ for frequency-varying signals. © 2014 ISA. Published by Elsevier Ltd. All rights reserved.

关键词： Position control

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