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Method for determining ESP reference yaw rate considering he driver's steering desire in extreme situation

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 2011年第SUPPL. 2期41卷 74-77页

作者： Guo, Jian Gao, Zhen-Hai Guan, Hsin Dong, Yi-Liang Qiao, Yan-Juan State Key Laboratory of Automobile Simulation and Control Jilin University Changchun 130022 China Changan Automobile Holding Ltd. Automotive Engineering Institute Chongqing 401120 China

The driver maneuver intention and its urgency level are characterized based on the angular speed of steering wheel and the low pass characteristic of vehicle. With the corrected method, the reference model of ESP has been corrected, which make the ESP intervene more properly. The ESP with the corrected method can not only improve the response behavior of vehicle, but also avoid the disturbance to driver caused by the ESP which would get involved at a bad time. The effect of the corrected method is validated with the field experiment results of a vehicle equipped with ESP.

关键词： Steering

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Numeric investigation of EGR and post-injection diesel emissions

Numeric investigation of EGR and post-injection diesel emiss...

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International Conference on Transportation, Mechanical, and Electrical Engineering (TMEE)

作者： Zhaojie Shen Zhongchang Liu Liu Yu Niu Xinchun State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130025 China State Key Laboratory of Automotive Simulation Control Jilin University Changchun China FAW Group Corporation R&D Center Jilin Changchun 130025 China FAW Group Corporation R&D Center Changchun Jilin China

In this paper, the effects of post-injection with EGR (exhaust gas recirculation) on diesel emissions are investigated to provide fundamental basis for controlling of EGR and post-injection on diesel. Various EGR rate with or without post-injection keeping the same total injection fuel under the speed of 1650r/min and 50% load conditions were simulated. It was found that soot emissions could keep constant as EGR rate increasing with post-injection compared to without post-injection conditions under low EGR rate (lower than 5%), at the same time NO emissions effectively decreased about 5%. However, as EGR rate is going to increase, soot emissions worsen sharply. Different dwell of Main and Post injection has irregular effects of NO and soot emissions under higher EGR rate of 14.7%, at the same time. NO and soot emissions changed regularly as main and post injection dwell increasing. It was also found that as Main injection timing advancing, the indicated thermal efficiency and soot emissions under high EGR rate were improved. And with 20% EGR, main injection timing advanced to 20° CA BTDC, the indicated thermal efficiency and soot emissions are more perfect than non-EGR.

关键词： Combustion Fuels Timing Diesel engines Mathematical model Atmospheric modeling

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Design of an ADRC-based electronic throttle controller

Design of an ADRC-based electronic throttle controller

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Chinese control Conference (CCC)

作者： Yunfeng Hu Qifang Liu Pengyuan Sun Hong Chen Jun Li State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun 130025 China Department of Control Science and Engineering Jilin University (Campus NanLing) Changchun 130025 China China FAW Group Corporation Research and Design Center Changchun 130011 China

Electronic throttle control is increasingly being considered as a viable alternative to conventional air management systems in modern spark-ignition engines. In this paper, an active disturbance rejection controller (ADRC) is proposed for the electronic throttle control. The ADRC controller consists of a linear extended state observer (ESO) to estimate the total disturbance and a linear state error feedback controller. The simulation results show that the ADRC controller can adapt well to the nonlinearity of electronic throttle system and has strong robustness to model uncertainties, and the experiment results are provided to demonstrate the effectiveness of the proposed controller.

关键词： Engines Springs Friction Observers Vehicle dynamics Torque Gears

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Study on the CIM based data integration platform

Study on the CIM based data integration platform

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Innovative Smart Grid Technologies (ISGT)

作者： Xianda Deng Ying Chen Ying Li Department of Electrical and Computer Engineering Arizona State University Tempe AZ USA Department of Electrical Engineering State Key Laboratory of Control and Simulation Tsinghua University Beijing China

Information & Communication Technology is one of highest priority deployment for smart grid development. Although Common information model (CIM) provides a general solution for information share and exchange; some problems still occur in CIM application. To solve the problems, a solution based on Object-relational mapping (ORM) and JAVA Reflection mechanism is proposed and a data platform based on the solution is also introduced. The system architecture of data platform is comprehensively designed and considered to achieve high reusability and flexibility. The strategies for importing, verifying and merging CIM data, from different vendors with different versions, are introduced and discussed respectively. A field practice case for data platform is presented and test results demonstrate the feasibility of the solution.

关键词： Computer integrated manufacturing XML Substations Testing Power system dynamics Java

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Stability Analysis of Two‐dimension Burnett Equations

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AIP Conference Proceedings 2011年第1期1376卷 94-96页

作者： Z. H. Zhu F. B. Bao J. Z. Lin J. X. Wang aInstitute of Fluid Measurement and Simulation China Jiliang University Hangzhou 310018 China bDepartment of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

Stability analyses of two‐dimension conventional Burnett and Woods equations were carried out. The characteristic stability equations of these two equations were first derived and the characteristic curves were achieved. The linearized stability analyses show that the two‐dimension conventional Burnett and Woods equations are not stable. The critical Knudsen numbers for these two extended hydrodynamic equations are 0.353 and 0.130, respectively. The critical Knudsen numbers are smaller than those of one‐dimension equations. The two‐dimension extended hydrodynamic equations are more unstable than one‐dimension equations.

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Modeling and simulation of the guide rod tandem suspension model

Modeling and simulation of the guide rod tandem suspension m...

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International Conference on Electric Information and control Engineering (ICEICE)

作者： Li Jie Zhang Zhe Zhu Yijie Zhang Jie State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China

ISBN: (纸本)9781424480364

The guide rod tandem suspension was divided into rigid parts and flexible parts by the analysis and simplification of its structure. In ADAMS, the model of rigid parts was built, and the model of flexible parts was built by the discrete beam element method. A integrated dynamic model of the guide rod tandem suspension was assembled by reasonable constraints between rigid parts and flexible parts. In order to validate the model, road vertical displacement motion actuators of four wheels were applied to simulate parallel wheel travel, pitch, roll and pitch-roll cases of the guide rod tandem suspension, the motion tracks of the suspension for four cases validated the reasonability of model.

关键词： Suspensions Analytical models Vehicle dynamics Atmospheric modeling Roads Actuators

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A self-healing reconfiguration technique for smart distribution networks with DGs

A self-healing reconfiguration technique for smart distribut...

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International Conference on Electrical and control Engineering (ICECE)

作者： Dapeng Li Shouxiang Wang Jie Zhan Yishu Zhao Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin China State grid of china technology College Jinan Shandong China

The requirement for power supply reliability and power quality has been increasing. When a fault occurs in distribution networks, fast locating and isolating the fault, restoring the power, and reducing outage time and area are becoming more and more crucial. The concept of fast self-healing has been proposed, which is also the requirement for smart grid development. In this paper, a self-healing reconfiguration technique is proposed for smart distribution networks with insertion of distributed generations (DGs). And a tree structure algorithm based on heuristic rules is proposed. Islands formed by DGs are used to deal with fault isolation and power restoration after a fault occurs. The effectiveness of the proposed algorithm is verified using a 26 bus bars test system with DGs.

关键词： Reliability Power system reliability Load flow Distributed power generation Power quality

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Energy cost and greenhouse gas emissions of a Chinese wind farm

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Procedia Environmental Sciences 2011年 5卷 25-28页

作者： Q. Yang G.Q. Chen Y.H. Zhao B. Chen Z. Li B. Zhang Z.M. Chen H. Chen State Key Laboratory of Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China China Hua Dian Corporation Beijing 100035 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

Wind power is considered as one of the most promising renewable energy sources in China. Presented in this study is a life cycle analysis of energy performance and greenhouse gas emission for a typical wind farm in Guangxi, with different stages of manufacturing, transportation, and installation of mechanical components, operation and maintenance, and disassemble and disposal taken into account. Results show that the nonrenewable energy cost and greenhouse gas emission to generate 1 MJ of electricity for the grid are 0.046 MJ and 0.002 kg CO2 equivalent, respectively. In consideration of the dominant power generation technology of coal combustion in China, the nonrenewable energy saving brought about by the concerned wind farm is estimated at 1.22E+7GJ during its twenty year operating period, while the reduced greenhouse gas emissions are as much as 1.03E+06 ton CO2 equivalent. It is believed that this successful example can lend solid support to a future wide use of wind power in China.

关键词： Embodied energy analysis Greenhouse gas emission Wind farm China

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An Improved Virtual Resistance Damping Method for Grid-Connected Inverters with LCL Filters

An Improved Virtual Resistance Damping Method for Grid-Conne...

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2011 IEEE Energy Conversion Congress and Exposition (ECCE 2011)

作者： Yi Lei Zhengming Zhao Fanbo He Sizhao Lu Lu Yin State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University 100084 Beijing P. R. China

ISBN: (纸本)9781457705427;9781457705410

In renewable energy generations, LCL filters are commonly used to connect in series with the output ports of the converter to smooth the currents flowing into the grid due to their enhanced attenuation ability and smaller inductance compared to single L filters. However, the inherent resonance of an LCL filter makes the control of such a system challenging, and different passive and active damping strategies have been developed till now. This paper aims to the damping problems of LCL filters and proposes a new approach to realize active damping. Based on traditional virtual resistance damping strategy, the new algorithm employs a lead compensation block in the capacitor current feedback loop so as to alleviate the impact of control delay. It is easy to be transformed from conventional virtual resistance damping method since just an additional digital filter is needed. Theoretical analyses for the essence equivalent relationship between passive damping and virtual resistance damping, as well as the impact investigation of control delay are made in details. The results show that the traditional virtual resistance active damping method is equivalent to passive damping of connecting damping resistance in parallel with the capacitor in the control block diagram, while the proposed virtual resistance active damping method is equivalent to passive damping of connecting damping resistance in series with the capacitor in the control block diagram. Both simulation and experimental results have verified the feasibility.

关键词： absorption of shock BLOCK DIAGRAM Capacitors Filters Virtual Equivalent damping force control block

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Embodied Energy Account of Chinese Economy 2002

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Procedia Environmental Sciences 2011年 5卷 184-198页

作者： M.M. Jiang B. Chen S.Y. Zhou State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Beijing Development Area Corporate Ltd. Low-carbon Center Beijing 100176 China

In this research, input-output (I-O) model was used to calculate the embodied (direct plus indirect) energy consumption of the Chinese 42 major sectors based on the estimation of the direct energy inputs to the Chinese economy in 2002. Several indicators, involving the embodied energy intensity, imported energy dependent index, and energy balance of trade, were provided to analyze the energy basement of the current Chinese industry. This study also explored the Chinese energy use structure for the added value and final use in 2002, and investigated the disparity in energy use between the rural consumption and the urban consumption. The cluster analysis was employed to group these sectors according to their similarities in embodied energy intensity, imported energy dependency, and energy use structure of final use. Conclusion shows that the energy industries held the highest energy intensities in China while most light industrial sectors, hi-tech sectors and various service sectors enjoyed the lowest energy intensities. And the petroleum associated sectors are most in degree for the imported-energy dependency in 2002, as a great contrast to the coal-associated industries. This was further explored through the Chinese energy balance of trade in 2002, which reveals that the oil consumed sectors encountered serious embodied energy deficits, but the sectors with coal as major fuel held embodied energy surplus.

关键词： Embodied energy Chinese economy I-O analysis 42 sectors Introduction

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