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American control Conference

作者： Yanyan Yin Peng Shi Fei Liu Hamid Reza Karimi Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi Jiangsu 214122 P. R. China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL United Kingdom Department of Engineering Faculty of Engineering and Science University of Agder N-4898 Grimstad Norway

ISBN: (纸本)9781457710957

In this paper, we propose a method for designing continuous gain-scheduled robust H_∞ observer on a class of extended stochastic nonlinear systems subject to time delay and actuator saturation. Initially, gradient linearization procedure is applied to describe such extended nonlinear systems into several model-based linear systems. Next, a robust linear H_∞ observer is designed to such linear stochastic models. Subsequently, a convex hull set is investigated and sufficient condition is derived in terms of feedback observer to determine whether a given initial condition belongs to an ellipsoid invariant set. Finally, continuous gain-scheduled approach is employed to design continuous nonlinear observers on the entire extended nonlinear jump system. A simulation example is given to illustrate the effectiveness of developed techniques.

关键词： Nonlinear stochastic system time delay Observers actuators system clock INITIAL CONDITIONS Nonlinear systems

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Industrial product design theory and method based on the advanced virtual design concept

Industrial product design theory and method based on the adv...

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2011 International Conference on Electric Information and control engineering, ICEICE 2011

作者： Wu, Xiaodong Jiang, Yinping Xu, Jie School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin China

ISBN: (纸本)9781424480395

This paper introduces the development situation of the industrial design through the application of virtual reality technology to realize the innovation of industrial product design. We learn the virtual reality technology in design of industrial products with cerebrovascular therapeutic and realize the important role of industrial product design. © 2011 IEEE.

关键词： Product design

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Three-dimensional simulation study of liquid turbine flow sensor

Three-dimensional simulation study of liquid turbine flow se...

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2nd Annual Conference on Electrical and control engineering, ICECE 2011

作者： Yang, Wenliang Sun, Lijun Zhang, Tao Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

ISBN: (纸本)9781424481637

With the turbine flow sensor applications increasingly widespread, the requirements of the turbine flow sensor accuracy are also higher. In this paper, the simulation model was built in strict accordance with the experimental 15mm diameter turbine flow sensor's geometric structure with careful grid resolutions. Five kinds of turbulence models, including standard k-, SST k-, RNG k-, Realizable k- and RSM, were used in three-dimensional simulation of 15mm diameter liquid turbine flow sensor and compared with the experimental data. The results showed that the relative error of the average meter factor between simulation and experimental results can reach 2.6% level. RNG k- and RSM model can more exactly predict the sensor's linearity. Standard k- can be more exact for the prediction of the meter factor of the sensor. The friction torque between the shaft and bearings obtained by theoretical formula has little effect on the turbine flow sensor simulation accuracy. © 2011 IEEE.

关键词： Turbulence models

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Research of magnetic suspension technology for the reformation of turbine flow meter

Research of magnetic suspension technology for the reformati...

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2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011

作者： Jiang, Yinping Zhang, Haili Liu, Shan Wang, Lei School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin China

ISBN: (纸本)9781612844572

This paper introduces a new-type turbine flow meter. The concept is to apply magnetic suspension bearing to reform turbine flow meter. Beginning with the structure and working principle of magnetic suspension bearing, the magnet suspension bearing is compared with the common bearing in their differences and characteristics. To draw a conclusion from the comparison that the turbine flow meter based on magnetic suspension bearings superiors to the one with common bearings, and the problems in the application of magnetic suspension bearing are introduced at the same time. Numerous experiments show that the range of measurement can be largely widened and the working life span of turbine flow meters also can be extended with magnetic suspension bearings. © 2011 IEEE.

关键词： Magnetism

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Improved Correlation for the Volume of Bubble Formed in Air-Water System

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Chinese Journal of Chemical engineering 2011年第3期19卷 529-532页

作者：王红一董峰卞聿晨谭超 Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

In order to address the bubble formation and movement in air-water two-phase flow,single bubble rising in stagnant water is experimentally studied by digital image *** are released individually from the submerged orifices with different diameters(1.81 mm,2.07 mm,2.98 mm,3.92 mm)at different detachment *** are recorded by a high-speed video camera and processed by digital image processing technique. The factors impacting the formed volume of bubble are *** experimental results showed that a threshold of gas flow rate(400 mm 3 ·s- 1)divides the bubble formation into two regimes:the constant volume regime and the growing volume *** for the growing volume regime,the surface tension is taken into *** bubble volume is consisted of two parts:the surface tension impacting part and the gas volume flow rate impacting *** improved correlation for bubble volume prediction is developed for the two regimes and better coincidence with the experiment data than the previous models is obtained.

关键词： high-speed image bubble formed volume gas volume flow rate gas orifice diameter

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Research on automatic calibration facility of mechanical pointer type flowmeter

Research on automatic calibration facility of mechanical poi...

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2nd Annual Conference on Electrical and control engineering, ICECE 2011

作者： Fang, Yan Sun, Lijun Qi, Lei Zhang, Yating Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

ISBN: (纸本)9781424481637

In order to solve the problem that mechanical pointer type flowmeter cannot be calibrated automatically, based on the photoelectric conversion principle, a non-contact meter pointer automatic identification sensor was designed. The signal acquisition hardware and software of the pointer identification sensor were designed also. Two flowmeters can be calibrated at the same time. It was shown by the result of experiments that automatic recognition of meter pointer, automatic signal acquisition and processing were achieved. It meets the industrial field demand of mechanical pointer type flowmeter automatic calibration. © 2011 IEEE.

关键词： Flow measurement

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Design and implement of water-flow calibration facilities

Design and implement of water-flow calibration facilities

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2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011

作者： Lei, Qi Lijun, Sun Tao, Zhang Shengjie, Li Yi, Liu School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin 300072 China

ISBN: (纸本)9781612844572

In this paper, a design of water-flow calibration facilities was proposed which was based on static mass method, static volume method and master meter method. Taking the water-flow calibration facility of Tianjin University Flow laboratory for an example, this paper specified the experiment pipeline design, buoyancy and density correction, control system design, and other key issues. At last an uncertainty analysis of the facility was provided, and the experiment data showed the combined standard uncertainty of this facility was 0.0243% used static mass method and 0.0559% used master meter method. © 2011 IEEE.

关键词： Calibration

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Comparison study on flow fields in vortex flow sensors with circular cylinder and trapezoidal cylinder bluff bodies

Comparison study on flow fields in vortex flow sensors with ...

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2011 International Conference on Machine Learning and Cybernetics, ICMLC 2011

作者： Zheng, Dan-Dan Zhang, Tao Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9781457703065

The flow fields in vortex flow sensors with circular cylinder and trapezoidal cylinder bluff bodies are investigated respectively. Then the characteristics of two flow fields are compared by numerical simulations while the mechanism of vortex shedding is analyzed in detail. Finally, the reason, which leads to different vortex shedding frequency and effects the relationship between Reynolds number and Strouhal number, has been specified as the size of wake flow region behind bluff body where the vortex generated. © 2011 IEEE.

关键词： Circular cylinders

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Bounded Synchronization of Switched Dynamical Networks with Non-identical Nodes

Bounded Synchronization of Switched Dynamical Networks with ...

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2012 International Conference on Modelling,Identification and control(建模、辨别与控制国际会议 ICMIC 2012)

作者： Liming Du Fengying Wang Feng Qiao State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityMinist Faculty of Information & Control Engineering Shenyang Jianzhu UniversityShenyang 110168China Faculty of Information & Control Engineering Shenyang Jianzhu UniversityShenyang 110168China

ISBN: (纸本)9781467315241

This paper investigates the synchronization problem of a complex dynamical network with non-identical nodes and switching *** an equilibrium for each node nor a synchronization manifold is assumed to *** select average state trajectory as the target of synchronization and establish the error dynamical *** single Lyapunov function method and the bounded synchronization theory, the switching law design method presented which guarantee the bounded synchronization of switched dynamical networks with non-identical *** results verify the validity of the results.

关键词： Complex dynamical networks Switching topology Synchronization Non-identical noses

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Online data-driven modeling for strip thickness based on subtractive clustering

Beijing Keji Daxue Xuebao/Journal of University of Science a...

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Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing 2012年第11期34卷 1338-1345页

作者： Liang, Hui Tong, Chao-Nan School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of the Ministry of Education for Advanced Control of Iron and Steel Process University of Science and Technology Beijing Beijing 100083 China

In hot rolling, actual production data were not used to improve the thickness quality of products. For this phenomenon, an online data-driven modeling algorithm was proposed for strip thickness control based on subtractive clustering. Firstly, the input space is divided into several clusters by subtractive clustering, in each cluster a sub-model is built by a least square support vector machine (LS-SVM), and an offline model is obtained by weighting the outputs of these sub-models. Then, when the online data constantly increase, the clustering subsets are adjusted on-line by a subtractive clustering algorithm, and the parameters of the sub-models are determined using the recursive algorithm of the least squares support vector machine. The predictive outputs of the sub-models are the final outputs. Experimental results demonstrate that the method has good prediction accuracy and online learning ability.

关键词： Least squares approximations

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