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Emission Model Structures for an Implementation on Engine control Units

IFAC Proceedings Volumes 2011年第1期44卷 11851-11856页

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

Abstract 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 NO x 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.

关键词： Emission Models ECU Model Computing Time Model Memory Demand

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Model Based Optimisation of a Step in Acceleration for a CR-Diesel Engine

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IFAC Proceedings Volumes 2011年第1期44卷 13016-13021页

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

Abstract 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 NO x , 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.

关键词： Emission Models Air Path Models Optimisation

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Knowledge-based diagnosis of process systems using procedure HAZID information

Knowledge-based diagnosis of process systems using procedure...

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Lecture Notes in Computer Science

作者： Werner-Stark, Ágnes Németh, Erzsébet Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary School of Chemical Engineering University of Queensland Brisbane QLD Australia Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Budapest Hungary

ISBN: (纸本)9783642238536

Earlier investigations show that the results of hazard identification (HAZID) and analysis (e.g. HAZOP or FMEA) can effectively be used for knowledge-based diagnosis of complex process systems in their steady-state operation. In order to extend this approach for transient operating conditions controlled by operating procedures, the notion of nominal input-output event sequences of qualitative signals has been introduced, and the deviations used in the procedure HAZID analysis have been defined therefrom. The diagnosis can then be performed algorithmically by matching the deviation sequences of the observed input-output event sequences and the nominal ones generated by qualitative dynamic models. The concepts and methods are illustrated using a simple case study consisting of a simple tank, controlled by an operating procedure. © 2011 Springer-Verlag.

关键词： Hazards

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Research and Experiment on Nonlinear Correction Algorithm of Metal Tube Rotameter

Research and Experiment on Nonlinear Correction Algorithm of...

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2011 2nd International Conference on Advanced Measurement and Test (AMT 2011)

作者： Gao-zhan Shen Tao Zhang Ying Xu Yan-xing Wei Laboratory for Process Measurement and Control School of Electrical and Automation Engineering Tian Jin University

The calibration curve of some metal tube rotameter has the characteristic of mutationIf the nonlinear least square method is still used as the method of linear correction, it will increase the measurement error and reduce the measurement accuracyThis paper presents a Division Ordinary Least Squares Method, which can reduce errors and improve accuracyBy the algorithm comparative experiment it can be proved that the method can improve the measurement accuracy.

关键词： floater ordinary least squares the method of linear correction

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Design of electrostatic velocimetry correlator used in gas-solid two-phase flow

Design of electrostatic velocimetry correlator used in gas-s...

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International Conference on Mechanic automation and control engineering (MACE)

作者： Chao Wang Zhang Zenghui Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

The velocity of solid particles in gas-solid two-phase flow is an important parameter, which can reflect the flow condition of gas-solid two-phase flow. However, it is difficult to be measured. The electrostatic sensor combined with correlation technique provides a proper solution to the velocity measurement of gas-solid two-phase flow. The digital signal controller dsPIC33F, which has the advantages of MCU and DSP, had been used in the design of embedded correlator. This correlator has the advantages of simple structure, good real-time performance, high reliability and low power consumption. Through the experiments on the belt electrostatic induction apparatus, this system can meet the requirement of the velocity measurement of gas-solid two-phase flow.

关键词： Velocity measurement Correlators Correlation Instruments Solids Electrostatics Fluid flow measurement

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Stochastic stability and stabilization of discrete-time Markovian jump systems in the presence of incomplete knowledge of transition probabilities

Stochastic stability and stabilization of discrete-time Mark...

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作者： Wang, Yijing Sun, Yunna Zuo, Zhiqiang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Department of Mathematics City University of Hong Kong Kowloon Hong Kong

ISBN: (纸本)9789881725592

This paper is concerned with the stability analysis and controller design for a class of discrete-time Markovian jump systems subject to incomplete knowledge of transition probabilities. Different from the previous results, some free-weighting matrices are introduced to obtain some new criteria with less conservatism. It is theoretically shown that the previous results are special cases if the free-weighting matrices are chosen to be some special forms. This brings much less conservatism compared with the previous ones. A numerical example is provided to show the effectiveness the proposed method. © 2011 Chinese Assoc of Automati.

关键词： Numerical methods

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New method about how to construct decision tree based on association rule

New method about how to construct decision tree based on ass...

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2011 IEEE International Workshop on Open-Source Software for Scientific Computation, OSSC-2011

作者： Gao, Jing Zhao, Baoyong Information College of Capital University of Economics and Business Beijing 100083 China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control for Iron and Steel Process Ministry of Education China

ISBN: (纸本)9781612844930

Nowadays, decision tree is widely used as one of the most powerful tools in data mining. However, to construct an optimization decision tree is a complete NP problem. So a new method about how to construct decision tree, which is based on association rule mining, is proposed in this paper. Firstly, approximate exact rule with high reliability is defined. Secondly new attributes are generated from the approximate exact rule. And then its evaluation method is discussed in detail. Thirdly, the decision tree is constructed with both the new generated attributes and its original data. Finally, after comprehensive analysis, experimental results show that this new method has higher accuracy than any other old method. © 2011 IEEE.

关键词： Association rules

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Characteristic of vertical multi-electrode conductance sensor array in two-phase flow measurement

Characteristic of vertical multi-electrode conductance senso...

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

作者： Xuelian, Yu Tan, Chao Can, Wei Dong, Feng Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

ISBN: (纸本)9781424480395

Conductance sensor array has broadly value in the measurement of two-phase flow parameters. This paper proposes a new configuration of conductance sensors with six rectangular electrodes of same size from the pipe facing to a inner cylinder-shape electrode. This configuration mainly focuses on measuring the volumetric and cross-sectional phase concentration of gas-liquid and liquid-liquid two-phase flow. The geometry of six electrodes conductance sensor was determined with finite element numerical analysis. The sensitivity distribution and response characteristic of the established electrical field is studied to explicit sensor mechanism and improve measuring accuracy. © 2011 IEEE.

关键词： Two phase flow

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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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International Conference on Electrical and control engineering (ICECE)

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

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.

关键词： Calibration Transmitters Detectors Temperature sensors Glass Current measurement Fluid flow measurement

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Design and realization of gas-solid two-phase flow standard facility

Design and realization of gas-solid two-phase flow standard ...

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2011 2nd International Conference on Mechanic automation and control engineering, MACE 2011

作者： Wang, Chao Wang, Yulin Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

ISBN: (纸本)9781424494392

Gas-solid two-phase flow is complicated and random, gas-solid two-phase flow standard facility is a very important method for the study of gas-solid two-phase flow problem. As to the design requirements of standard facility, a gas-solid two-phase flow standard facility used to calibratio electrostatic sensor is designed. © 2011 IEEE.

关键词： Gases

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