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

ISBN: (纸本)9783902661937

Due to more and more stringent emission regulations the optimisation of transient engine operation becomes necessary for future Diesel engine developments. Exemplary for the transient operation a step in acceleration pedal is investigated and optimised with respect to the engine emissions. This gives insights about the emission formation at transient driving and a benchmark for the design of open and closed-loop controls. A model structure to simulate the engine emissions and the engine torque is presented. It consists of a dynamical mean value air path model and a stationary combustion model. Thus the relevant outputs NOx, soot and torque are simulated with respect to the engine actuators. For optimisation the calibrated emission values for steady state are regarded. The actuators of the air path and the crank angle of the main injection are optimised such that the emissions follow a desired trajectory. The results are compared to a non-optimised step in acceleration and to a nonlinear closed loop control of the air path. © 2011 IFAC.

关键词： Diesel engines

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Adaptive generalized predictive decoupling control for a class of MIMO nonlinear systems based on unmodeled dynamic compensation

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Kongzhi Lilun Yu Yingyong/control Theory and Applications 2012年第2期29卷 157-166页

作者： Zhang, Ya-Jun Chai, Tian-You Wang, Hong Niu, Hong The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang Liaoning 110004 China Research Center of Automation Northeastern University Shenyang Liaoning 110004 China The Control Systems Centre School of Electrical and Electronic Engineering University of Manchester M60 1QD United Kingdom Institute of System Science Northeastern University Shenyang Liaoning 110004 China

For a class of uncertain multi-input-multi-output (MIMO) discrete-time nonlinear systems with strong coupling and unstable zero-dynamics, an adaptive generalized predictive decoupling switching control method based on unmodeled dynamic compensation is proposed. It is only required that the higher order nonlinear terms of the system to satisfy a linear growth condition, rather than the global boundedness condition widely used. The analysis of stability and convergence of the adaptive control method are performed. Moreover, in designing the nonlinear generalized predictive decoupling controller, we combine the adaptive-network-based fuzzy inference system (ANFIS) training with the "one-toone mapping" technique to adaptively estimate the unmodeled dynamics, so that the universal approximation property of ANFIS can be guaranteed. Finally, simulation results demonstrate the superiority of the proposed method and validate the theoretical analysis.

关键词： Nonlinear systems

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Digital imaging and piezo-dispenser actuator in automatic flocculation control

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Sensors and Transducers 2012年第1期136卷 83-95页

作者： Tomperi, Jani Honkanen, Markus Kallio, Pasi Leiviskä, Kauko Saarenrinne, Pentti Joensuu, Iiris Piironen, Marjatta Control Engineering Laboratory Department of Process and Environmental Engineering University of Oulu P. O Box 4300 FIN-90014 Finland Tampere University of Technology Department of Energy and Process Engineering P. O. Box 589 FIN-33101 Tampere Finland Tampere University of Technology Department of Automation Science and Engineering P. O. Box 692 FIN-33101 Tampere Finland Kemira Oyj Espoo R and D Center P. O. Box 44 FIN-02271 Espoo Finland

This study presents an image-based on-line control system for a coiled pipe flocculator. A digital imaging technique developed previously is utilized to measure the characteristic floc size and a high-pressure piezo-dispenser is introduced for accurate dosing and rapid mixing of the flocculant. The controller is a conventional PI controller. Step change experiments on feed water quality, flow rate and desired floc size have been carried out for controller tuning and testing. The paper shows that the piezo-dispenser provides better flocculation results than a conventional dosing pump, and the flocculation result can be automatically controlled even when the feed water quality rapidly changes. The proposed flocculator is a simple, inexpensive and practical system for long-term laboratory tests to investigate the functionality of flocculants on varying feed *** © 2012 IFSA.

关键词： Water treatment

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Predictive control of convex polyhedron LPV systems with Markov jumping parameters

Predictive control of convex polyhedron LPV systems with Mar...

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Chinese control and Decision Conference, CCDC

作者： Yanyan Yin Fei Liu Peng Shi Hamid Reza Karimi Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 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

The problem of receding horizon predictive control of stochastic linear parameter varying systems is discussed. First, constant coefficient matrices are obtained at each vertex in the interior of linear parameter varying system, and then, by considering semi-definite programming constraints, weight coefficients between each vertex are calculated, and the equal coefficients matrices for the time variable system are obtained. Second, in the given receding horizon, for each mode sequence of the stochastic convex polyhedron linear parameter varying systems, the optimal control input sequences are designed in order to make the states into a terminal invariant set. Outside of the receding horizon, stability of the system is guaranteed by searching a state feedback control law. Finally, receding horizon predictive controller is designed in terms of linear matrix inequality for such system. Simulation example shows the validity of this method.

关键词： Markov processes Predictive control Equations Educational institutions Programming Symmetric matrices

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Electric eddy current pick-up of turbine flow sensor and CPLD nonlinearity correction

Electric eddy current pick-up of turbine flow sensor and CPL...

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

作者： Zhai, Wei-Qiang Sun, Li-Jun Liu, Xi-Bao Zhang, Tao School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control China

ISBN: (纸本)9781424480395

The force due to electromagnetic pick-up can affect the performance of small pipeline turbine flow sensor. Based on electric eddy current, a new pick-up was designed for eliminating the effect of reluctance torque in traditional pick-up. The range ability of DN4mm, DN6mm and DN10mm turbine flow sensor were expanded to 101. The reliability of nonlinearity correction by software is not fully guaranteed as it was applied in bad work condition. In order to solve the problem, a method of nonlinearity correction by hardware, is that Complex Programmable Logic Device (CPLD), was put forward. It was shown by turbine flow sensor prototype experiment with electric eddy current pick-up combining CPLD hardware nonlinearity correction. DN4mm, DN6mm and DN10mm turbine flow sensor obtain the linearity 0.32%, 0.26%and 0.32% respectively in the range ability of 101. © 2011 IEEE.

关键词： Logic devices

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Experimental research of averaging pitot tube flow sensors with Flow Conditioning Wing

Experimental research of averaging pitot tube flow sensors w...

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

作者： Zhang, Limin Sun, Lijun Qi, Lixiao School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin China

ISBN: (纸本)9781424480395

Cross-section shape of Averaging Pitot Tube (APT) flow sensor probe is a determinant factor in meter performance. In order to improve the performance of APT flow sensor, the experimental research of APT flow sensor with Flow Conditioning Wing (FCW) was carried out at the water flow standard facility in Tianjin University, and compared with the cross-sections of circle, diamond and Delta Bar. Shown by the experimental data, the linearity error, the meter factor and the repeatability error of FCW cross-section are close to 0.5%, 0.55 and 0.1% respectively, which are better than the other cross-section shapes. The measuring precision is improved. © 2011 IEEE.

关键词： Flow of water

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Simulation of sensing field for electromagnetic tomography system

Simulation of sensing field for electromagnetic tomography s...

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

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

ISBN: (纸本)9781424480395

Electromagnetic tomography has potential value in process measurement. The frontier of electromagnetic tomography system is the sensor array. Owing to the excited signal acting on the sensor array directly, the excited strategy and the frequency and amplitude of the signal affect the quality of the information that the detected coil acquired from the object space. Furthermore, it would affect the accuracy of the information post extracted from the object field. To improve the sensitivity of the sensor array on the changes of the object field distribution, upgrade the sensitivity and accuracy of the system and guarantee high precision and high stability of the experimental data, use the finite element simulation software COMSOL Multiphysics to analyze the excited strategy and the characteristic of the excitation frequency of electromagnetic tomography. Establish the foundation in optimal using of electromagnetic tomography system. © 2011 IEEE.

关键词： Computer software

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Research of roots flow meter based on ARM Cortex-M3

Research of roots flow meter based on ARM Cortex-M3

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International Conference on Consumer Electronics, Communications and Networks

作者： Jiang, Yinping Wang, Lei Zhang, Haili Liu, Shan 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 an intelligent roots flow meter based on ARM Cortex-M3 processor and μC/OS-II embedded real-time operating system. ARM Cortex-M3 processor is an industry-leading 32-bit processor with lower power consumption and higher performance than other 8-bit or 16-bit processors. Using the μC/OS-II embedded real-time operating system, it will compensate the temperature and pressure of the roots flow meter more instantly. What's more, it makes communication and networking easier by using ZigBee technology. © 2011 IEEE.

关键词： Zigbee

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Analysis and selection of the flow stability parameter of flow standard facility

Analysis and selection of the flow stability parameter of fl...

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

作者： Wei, Yanxing Sun, Lijun He, Ziyan Zhang, Tao Tianjin Key Laboratory for Process Measurement and Control School of Electrical and Automation Engineering Tianjin University Tianjin China

ISBN: (纸本)9781424481637

In this paper, the evaluation methods of flow standard facility in every regulations were compared and analyzed. Analysis of the two performance parameters of the flow stability within cumulative time and the flow stability between cumulative time. From the two angles of the structure of turbine flow meter itself and the calculation formula of the stability parameter, the selection principle of the stability parameter is determined. The flow stability between cumulative time is selected as the main parameter, and the flow stability within cumulative time as reference. And the results of flow stability test between the method of turbine flow meter and the weighing method were compared. The results show that the method of turbine flow meter can also be an accurate method for testing the flow stability of flow standard facility. © 2011 IEEE.

关键词： Stability

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control system of Siemens GT based on IGCC

Control system of Siemens GT based on IGCC

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

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

ISBN: (纸本)9781424481637

In this paper, Siemens Power Plant automation control System (SPPA-T3000) based on IGCC power plant is described. The principle and process of IGCC power plant are first introduced, followed by the introduction of the Siemens gas turbines in IGCC power plant development and experience. Finally focuses on the SPPA-T3000 control system and its role in the composition. For example, a gas turbine controller of DENOX water system is described. © 2011 IEEE.

关键词： control systems

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