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The 7th International Symposium on Measurement Techniques for Multiphase Flows

作者： Y.Y.Zhao G.Lucas T.Leeungculsatien T Zhang School of Computing and Engineering University of Huddersfield Huddersfield HD1 3DHUK Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

Electromagnetic flow meters based on the principles of Faraday's laws of induction have been used successfully in many *** order to achieve velocity profile measurements in single phase and multiphase flows with non-uniform velocity profiles,a novel Imaging Electromagnetic Flow meter(IEF) has been developed which is described in this *** novel electromagnetic flow meter uses a microcontroller as the processing core to achieve the function of driving the uniform magnetic field,acquiring voltage signals with electronic system,matrix inversion calculation and result *** work undertaken in the paper demonstrates that an imaging electromagnetic flow meter for liquid velocity profile measurement is an instrument that is highly suited for control via a microcontroller.

关键词： electromagnetic flow meter induced voltage weight value microcontroller

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A Tighter Reachable Set Bound for Linear Systems Subject to both Discrete and Distributed Delays

A Tighter Reachable Set Bound for Linear Systems Subject to ...

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IEEE Annual Conference on Decision and control

作者： Zhiqiang Zuo Youhua Fu Yijing Wang Chanying Li Michael Z. Q. Chen Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Academy of Mathematics and Systems Science Chines Academy of Sciences Department of Mechanical Engineering The University of Hong Kong

ISBN: (纸本)9781467320658

The problem of reachable set bounding for a class of linear systems subject to both discrete and distributed delays is addressed in this paper. First, a new criterion is derived to give an ellipsoid which bounds all the states starting from the origin by inputs with peak-values. The constraint with a special structure that appeared in our previous result is removed by combining the Jensen integral inequality and the reciprocally convex approach. In addition, the obtained condition brings a tighter reachable set estimation with lower computational complexity. We also extend the above result to systems with polytopic uncertainties. Finally, an example is presented to illustrate the merit of our proposed method.

关键词： delay distribution Linear system discrete element Ellipsoid complexity classes Bound Set (Psychology)

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Production Planning Simulating System for Tire Vulcanization Based on Heuristic Algorithm

Production Planning Simulating System for Tire Vulcanization...

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The 24th Chinese control and Decision Conference (第24届中国控制与决策学术年会 2012 CCDC)

作者： Shengping Yu Diancai Yang Kehui Zhu State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University) She Mesnac Co. Ltd National Tire Technology and Control Engineering Technology Research Center Qingda

In the process of tire production, vulcanization process is the last process and core process in the total production. The vulcanization process becomes the main bottleneck of the whole tire production process because of the process’s long manufacture time, manufacture centralizing, energy sources large consume. Its plan quality is the key function of improving the utilization of vulcanization equipments and reducing the production cost. Production planning simulating system for vulcanization process based on heuristic algorithm was developed on the basis of studying planning strategy. The system integrates production planning, adjusting production starting time, adjusting the number of devices, inserting orders and withdrawing orders. The software system was tested by online data. Results show that the planning method can quickly workout the optimal production planning of vulcanization. The method will lay the firm groundwork for application to production process in the future.

关键词： Tire vulcanization Heuristic algorithm Production planning plan adjustment

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Camera self-calibration based on single rectangle

Camera self-calibration based on single rectangle

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International Conference on Intelligent control and Information processing (ICICIP)

作者： Jie Dong Zhen Qin Jie Dong is with School of Automation & Electrical Engineering University of Science and Technology Beijing and Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) Beijing China Zhen Qin was with School of Automation & Electrical Engineering University of Science and Technology Beijing Beijing China

The main difference between visual servo control and computer vision is the requirement of real-time control, which is often higher for the former. Considering the image-based visual control system, camera is included in the closed loop, so the precision is not sensitive to the error of camera parameters. A camera self-calibration method based on a single rectangle is proposed in the paper according to the fact that visual servo system emphasizes real-time property over accuracy for camera models. The image information of the four rectangular vertexes is obtained by the method based on the corner detection in curvature scale space, according to the geometric relationship constructing constraint equations to calibrate camera intrinsic parameters. The advantages of this method are its linear calculation and simple calibrating procedure, avoiding the complex problems of non-linear optimization. The feasibility of this method is shown through simulation and practicality experiments. Regardless of the lower robustness of the proposed method comparing to traditional calibration methods, it is more adaptable to visual servo control system due to its excellent real-time property.

关键词： Cameras Calibration Transmission line matrix methods Visualization Mathematical model Equations Real-time systems

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Design and Implementation of nonlinear neural network controller based on simulator model in Damavand Tokamak

Design and Implementation of nonlinear neural network contro...

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第24届中国控制与决策会议

作者： H. Tolouei A. Kouhi H. Rasouli C. Rasouli Advanced Process Automation & Control Laboratory (APAC) faculty of Electrical Engineering Control department K.N. Toosi University of TechnologyTehran Iran Plasma Physics and nuclear fusion institute Institute of nuclear science and technology (AEOI)Tehran Iran.

In this study, nonlinear neural network controller will be developed to control plasma radial motion in Damavand Tokamak. It is essential to have a good model in order to design a proper controller for plasma radial motion. To achieve this goal, actuator circuits are simulated and in consequence based on simulator model and simulated actuator circuits nonlinear neural network controller will be designed in Damavand Tokamak. Comparison between neural network controller output and PD controller output shows the efficiency of proposed approach.

关键词： Tokamak, Actuator circuits, nonlinear neural network controller, Gradient descent algorithm, Momentum algorithm.

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A Non-canonical Example to Support P Is Not Equal to NP

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Transactions of Tianjin University 2011年第6期17卷 446-449页

作者：杨正瓴 School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control

The more unambiguous statement of the P versus NP problem and the judgement of its hardness, are the key ways to find the full proof of the P versus NP problem. There are two sub-problems in the P versus NP problem. The first is the classifications of different mathematical problems (languages), and the second is the distinction between a non-deterministic Turing machine (NTM) and a deterministic Turing machine (DTM). The process of an NTM can be a power set of the corresponding DTM, which proves that the states of an NTM can be a power set of the corresponding DTM. If combining this viewpoint with Cantor's theorem, it is shown that an NTM is not equipotent to a DTM. This means that "generating the power set P(A) of a set A" is a non-canonical example to support that P is not equal to NP.

关键词： P versus NP computational complexity theory Cantor＇s theorem power set continuum hypothesis

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Output regulation for switched linear systems with different coordinate transformations

Output regulation for switched linear systems with different...

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UKACC International Conference on control (control)

作者： Xiao Xiao Dong Xi Ming Sun Jun Zhao Georgi M. Dimirovski State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China School of Control Science and Engineering Dalian University of Technology Dalian China School FEEIT SS Cyril and Methodius University Skopje Macedonia School of Engineering Dogus University Istanbul Turkey

This paper addresses the output regulation problem for switched linear systems. When each regulation equation has their own solution, we give a sufficient condition for the output regulation problem to be solvable. Firstly, we give the regulation equations of switched linear systems and the relation of the transformed states between two consecutive switching times. Secondly, the existence of a minimal average dwell-time for every switching sequence is assumed, and by virtue of an appropriate Lyapunov analysis, the output regulation is achieved. Our result is of much less conservativeness.

关键词： Switches Linear systems Switched systems Equations Lyapunov methods Educational institutions

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Guaranteed cost control for a class of switched systems via multiple Lyapunov function method

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ICIC Express Letters, Part B: Applications 2012年第1期3卷 153-158页

作者： Yi, Likui Liu, Quanli Du, Shengli Ma, Ruicheng State Key Laboratory of Synthetical Automation for Process Industries Northeastern University No. 3-11 Wenhua Road Heping District Shenyang 110819 China School of Control Science and Engineering Dalian University of Technology No. 2 Linggong Road Ganjingzi District Dalian 116024 China

This paper deals with the problem of guaranteed cost control for a class of switched systems with affine vector fields by using multiple Lyapunov function method. The multiple Lyapunov function (MLF) is constructed from a set of auxiliary function having quadratic and linear terms for each subsystem of the switched systems. By using such an MLF, a switching rule is determined to enforce the state of the switched systems to a desired equilibrium point and make a guaranteed cost performance hold. Sufficient conditions for the existence of such a switching rule are also given in form of linear matrix inequalities (LMIs). Finally,the method is applied to a boost converter. © 2012 ISSN 2185-2766.

关键词： Linear matrix inequalities

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Output feedback control of hypersonic vehicles based on neural network and high gain observer

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Science China(Information Sciences) 2011年第3期54卷 429-447页

作者： LI XinDong,XIAN Bin,DIAO Chen,YU YanPing,YANG KaiYan & ZHANG Yao The Tianjin Key laboratory of process Measurement and control,School of Electrical engineering and automation,Tianjin University,Tianjin 300072,China 1. The Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

In this paper,the output feedback control problem for a genetic hypersonic vehicle is considered under the restriction that only the vehicle’s velocity and altitude are measurable. High gain observers (HGO) are utilized to provide estimation signals for unmeasurable derivatives of the vehicle’s velocity and altitude. Neural network based feedforward function is designed to compensate for model uncertainties. The proposed control design require less knowledge of the hypersonic vehicle’s dynamic model. A comprehensive stability analysis of the closed loop system under the output feedback control is carried to prove that the proposed control law yields semiglobal uniformly ultimately bounded tracking while keeping all the closed loop signals bounded. Numerical simulation results are presented to validate the proposed control design.

关键词： hypersonic vehicle nonlinear output feedback control neural network high gain observer

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Emission model structures for an implementation on engine control units

Emission model structures for an implementation on engine co...

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作者： Sequenz, Heiko Isermann, Rolf Institute of Automatic Control Laboratory of Control Engineering and Process Automation Technical University Darmstadt Germany

ISBN: (纸本)9783902661937

The number of model-based approaches in modern engine control units (ECUs) increases permanently with the increase of engine complexity. Therefore the efficient storage and the fast computation of these models is a challenging task. Due to their fast computation properties most ECUs utilize 2-dimensional grid map structures. Higher dimensional relations need then to be mapped with nested structures of several 2-dimensional grid maps. The determination of suited structures is a time-consuming task and the number of utilized 2-dimensional grid maps may be large for higher dimensional relations. Therefore in the following a grid map structure, a LOLIMOT structure, a Kernel method and an adaptive polynomial approach are compared with respect to model accuracy, computation time and required memory. Conclusions about the implementation on state of the art ECUs are given. As model output the NOx emissions of a DTH Z19 Opel CR-Diesel engine with VGT-turbocharger and exhaust gas recirculation are regarded. Model structures are presented for a global model approach comprising the engine operation point as input, and for a global-local approach predicting the output by weighting local models. © 2011 IFAC.

关键词： Exhaust gas recirculation

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