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2010 International Conference on Intelligent control and Information processing, ICICIP 2010

作者： Liu, Dexin Li, Xiaoli Zhou, Xiang Yin, Yixin Chen, Xianzhong Hou, Qingwen Department of Automation Information and Engineering School University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education University of Science and Technology Beijing Beijing 10083 China

ISBN: (纸本)9781424470488

A kind of pattern recognition method with Fuzzy clustering is applied to identify the burden surface of blast furnace. According to the information of burden surface distribution, the target clustering analysis is used to set up a standard model database. Based on the character of distribution, each target burden surface is matched into different standard model database by using fuzzy pattern recognition method. Maximal minimal similarity method is adapted in the course of fuzzy pattern recognition. The simulation results show the effectiveness of the proposed method. © 2010 IEEE.

关键词： Blast furnaces

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A Comparison of Arithmetic Operations for Dynamic process Optimization Approach

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Chinese Journal of Chemical engineering 2010年第1期18卷 80-85页

作者：洪伟荣谭鹏程王树青 Pu Li Institute of Process Equipment Zhejiang University Hangzhou 310027 China Institute of Cyber-System and Control State Key Lab of Control Technology Zhejiang University Hangzhou310027 China Institute of Automation and Systems Engineering Ilmenau University of Technology Ilmenau 98684 Germany

A comparison of arithmetic operations of two dynamic process optimization approaches called quasi-sequential approach and reduced Sequential Quadratic Programming(rSQP)simultaneous approach with respect to equality constrained optimization problems is *** the detail comparison of arithmetic operations,it is concluded that the average iteration number within differential algebraic equations(DAEs)integration of quasi-sequential approach could be regarded as a *** formula is given to calculate the threshold value of average iteration *** the average iteration number is less than the threshold value,quasi-sequential approach takes advantage of rSQP simultaneous approach which is more suitable *** optimal control problems are given to demonstrate the usage of threshold *** optimal control problems whose objective is to stay near desired operating point,the iteration number is usually ***,quasi-sequential approach seems more suitable for such problems.

关键词： dynamic optimization arithmetic operation comparison quasi-sequential approach simultaneous approach

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Adaptive tracking control of underactuated quadrotor unmanned aerial vehicles via backstepping

Adaptive tracking control of underactuated quadrotor unmanne...

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作者： Huang, Mu Xian, Bin Diao, Chen Yang, Kaiyan Feng, Yu Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Chinese State Nuclear Power Technology Corporation LTD Beijing 100140 China

ISBN: (纸本)9781424474264

This paper considers about the control problem for an underactuated quadrotor UAV system with model parameter uncertainty. Backstepping based techniques are utilized to design a nonlinear adaptive controller which can compensate for the mass uncertainty of the vehicle. Lyapunov based stability analysis shows that the proposed control design yields asymptotic tracking for the UAV's motion in x, y, z direction and the yaw rotation, while keep the stability of the closed loop dynamics of the quadrotor UAV. Numerical simulation results are provided to show the good tracking performance of proposed control laws. © 2010 AACC.

关键词： Backstepping

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A nonlinear robust control design combined with neural network for a 3 degree of freedom (DOF) helicopter

A nonlinear robust control design combined with neural netwo...

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作者： Yang, Kaiyan Xian, Bin Li, Xindong Yu, Yanping Diao, Chen-Diao Feng, Yu Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Chinese State Nuclear Power Technology Corporation Ltd. Beijing 100140 China

ISBN: (纸本)9787894631046

In this paper, we proposed a nonlinear robust control design combined with neural network for a 3 degree of freedom (DOF) helicopter test-bed which may be subjected to unknown external disturbance and contains structure uncertainties. Regulation and tracking control design are proposed for the angles of elevation, pitch and travel axes. Numerical simulation results are provided to illustrate that the proposed controllers achieve good performance and the closed loop systems obtain good robustness with respect to system uncertainties and disturbances.

关键词： Robust control

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Single Source Current Drive Patterns for Electrical Impedance Tomography

Single Source Current Drive Patterns for Electrical Impedanc...

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IEEE Instrumentation & Measurement Technology Conference

作者： Lifeng Zhang Huaxiang Wang Department of Automation North China Electric Power University Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation TianjinUniversity

ISBN: (纸本)9781424428328;9781424428335

Electrical impedance tomography (EIT) is a technique for reconstructing conductivity of an inhomogeneous medium by injecting currents at the boundary of an object and measuring the resulting changes in voltage. The SNR of acquisitive data and the reconstructed image quality of EIT system are directly determined by current drive patterns. In this paper, eight current drive patterns with the same boundary voltage measurement strategy have been studied. The isopotential lines, the number of independent measurements, measured voltage dynamic range, voltage change with conductivity change and reconstructed image quality of these patterns are compared, through which an optimal current drive pattern was obtained.

关键词： Electrical impedance tomography Current drive pattern Finite element method Image reconstruction

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Stochastic stabilization of Markovian jump systems in the presence of partial unknown transition probabilities and actuator saturation

Stochastic stabilization of Markovian jump systems in the pr...

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Chinese control Conference (CCC)

作者： Yijing Wang Zhiqiang Zuo Yulong Cui Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University 300072 China

This paper deals with the controller design problem for Markovian jump systems subject to partial unknown transition probabilities and actuator saturation. Different from the previous results where complete knowledge on the transition probabilities is available, a new controller synthesis scheme is proposed as well as an estimate of the domain of attraction in mean square sense. A sufficient condition is first established to guarantee the stochastic stability of the closed-loop system. An optimization problem with LMI constraints is then formulated to determine the largest contractively invariant set in mean square sense. Finally, a numerical example is provided to show the effectiveness of our method.

关键词： Actuators Silicon Bismuth Markov processes Robustness Stability analysis

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A Harmonic Signal Generator Based on DDS and SOPC

A Harmonic Signal Generator Based on DDS and SOPC

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The 22nd China control and Decision Conference(2010年中国控制与决策会议)

作者： Zhiqiang Zhang Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering & Automation Tianjin University Tianjin 300072

A harmonic signal generator with adjustable frequency, phase and harmonic proportion is designed in this paper. The design of this harmonic signal generator is based on direct digital frequency synthesis (DDS) technology and the idea of System on a Programmable Chip (SOPC). The classic structure of DDS is introduced and a kind of compression ROM is designed. Then, the DDS core with compression ROM is compiled using Quartus II by VHDL language. As a kind of processor which is supplied by Atera Inc., the soft core, Nois II is embedded on FPGA chip. Using Nois II and other modules, a system is designed on one single FPGA chip. The performances such as integration, expansibility are very much improved. The principle of DDS is discussed particularly;the optimized structure of DDS core and the design SOPC on single FPGA are presented in this paper.

关键词： DDS SOPC harmonic signal generator Noise

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Cross correlation velocity of oil-water two-phase flow by a Dual-plane Electrical Resistance Tomography system

Cross correlation velocity of oil-water two-phase flow by a ...

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IEEE Instrumentation and Measurement Technology Conference

作者： Chao Tan Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

ISBN: (纸本)9781424428328;9781424428335

Oil-water two-phase flow is commonly encountered in industrial processes of petroleum and chemical engineering. The process parameters, such as velocity and phase concentration of the mixture are of great importance in both scientific and engineering field. Cross correlation technique is one of the methods of calculating the flow velocity by deriving the transit time of the fluid flowing through a pair of parallel mounted sensors on the target pipelines. The physical meaning of the cross correlation velocity is still an open discussion in the field of multi-phase flow measurement. In this research, a Dual-plane Electrical Resistance Tomography (ERT) is adopted to cross correlate the sensing data from two electrode planes. A method of dynamically seeking suitable signal segment for cross-correlating measured signals from two-phase flow is proposed. The results show that the cross correlation velocity is a structural velocity within two-phase flow, and the relationship of cross correlation velocity and mixture velocity is affected by the water flowrate within the two-phase flow.

关键词： Electric resistance Tomography Electrical resistance measurement Fluid flow measurement Chemical industry Petroleum industry Chemical engineering Pipelines Velocity measurement Electrodes

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A measurement method of slug flow velocity of gas-liquid two-phase flow in horizontal pipe

A measurement method of slug flow velocity of gas-liquid two...

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IEEE Instrumentation and Measurement Technology Conference

作者： Fusheng Zhang Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

ISBN: (纸本)9781424428328

Slug flow is an important flow regime of gas/liquid two-phase flow. The parameters measurements of slug flow are of great importance in scientific and engineering field. Local cross-correlation method is put forward in this paper to make the mixed velocity measurement of slug flow. Different from normal cross-correlation method, this local cross-correlation make direct use of electrode voltage data and gives detail velocity information of the cross-section. According to the electrode distribution in the pipe cross-section, the excitation manners have been sorted into 3 kinds and measured electrodes have been cut into 9 sorts. A static experiment is carried out to testify and concretely analyze the sensitivity difference of different excitation manners and different located measuring electrodes. Results of static experiment verify the above sorting manner and show that different excitation manner and different measured area has its own apparent data feature and. In this local cross correlation method, only selected electrode pairs instead of all electrodes as normal data process participate in excitation process. So the system efficiency has improved, and as a consequence the velocity resolution of cross correlation is improved. The dynamic experiment result shows the efficiency of this local cross-correlation method and the experiment error is within 10%.

关键词： Fluid flow measurement Velocity measurement Electrodes Chemical industry Petroleum industry Ultrasonic variables measurement Fluid flow Voltage Position measurement Gas industry

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Mobile Robot Gas Source Localization via Top-Down Visual Attention Mechanism and Shape Analysis

Mobile Robot Gas Source Localization via Top-Down Visual Att...

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The 8th World Congress on Intelligent control and automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Ping Jiang Qing-Hao Meng Ming Zeng Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

A novel mobile robot based gas source localization method in which the top-down visual attention mechanism (TDVAM) is combined with shape analysis is proposed. At each location, three different images which cover the scene in front of the robot are captured via changing the horizontal angle of an onboard pan/tilt camera. In each image, three salient regions are computed using TDVAM model, and maximal one plausible gas source from three salient regions is identified by using the shape analysis. The positions of recognized plausible gas sources are determined with a laser range scanner. The robot is navigated to the plausible gas sources one by one and gas concentration information is used to judge if the plausible sources are real ones. Experimental results in a complex indoor airflow environment in which valves are used to simulate gas sources demonstrate the feasibility and high efficiency of the proposed gas source localization approach.

关键词： Shape Visualization Mobile robots Robot sensing systems Computational modeling Feature extraction Pixel

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