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Flatness-based Feedforward and Feedback control for Fuel Rail system of Gasoline Direct Injection Engine

IFAC-PapersOnLine 2016年第11期49卷 775-780页

作者： Liu, Q.-F. Wang, C.-Y. Hu, Y.-F. Chen, H. State Key Laboratory of Automotive Simulation and Control Jilin University China Department of Control Science and Engineering Jilin University China

For gasoline direct injection (GDI) engines, obtaining desired rail pressure has become a key prerequisite of fuel injection quantity precise control. Since improved control performance and robustness will translate into better combustion stability, fuel economy and emissions. This paper develops a feedforward-feedback controller based on a nonlinear model of fuel rail system, where nominal feedforward control is derived by differential flatness and fuel rail pressure is selected as flat output. In feedback part, to simplify the design, the system is linearized on equilibrium point using Taylor series expansion, and Lyapunov method is used to ensure stability of closed-loop error system. Finally, the proposed controller is verified by fuel rail system simulation model established in AMESim software package, the simulation results in different pressure references demonstrate the effectiveness of the control system. © 2016

关键词： Direct injection Computer software controllers Engines Feedback control Feedforward control Fuel economy Gasoline Lyapunov methods Combustion stability Different pressures Differential flatness Feedforward and feedback control Feedforward feedback controllers Gasoline direct injection engines Injection quantity Taylor series expansions

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Quantitative dispensing model and experimental study of high viscosity multi-component adhesive

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AIP Conference Proceedings 2019年第1期2154卷

作者： Yifei Bu Yugang Liu Zhanjing Li Weibin Rong Lining Sun 1State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China 2Xi’an Flight Automatic Control Research Institute Aviation Industry Corporation of China Xi’an 710071 China

Aiming at the phenomenon that high-viscosity multi-component adhesives are difficult to control due to viscosity changes, a mechanism using piston to dispense is designed. By analyzing the flow properties of multi-component adhesives, a consistency coefficient related to the mixing time of each component of the glue is introduced to the shear stress of the colloidal by its physical meaning, so the viscosity changes could be characterized during the dispensing process. The model of the dispensing system was established by the viscous fluid mechanics and the estimation function of the flow rate out of needle was given. According to the experimental verification of the specific adhesive, the dispensing system designed in this paper can directly control the amount of dispensing by adjusting the motor pulse frequency and the dispensing time. In the case, the simulation results are basically consistent with the experimental results, and the flow error can be kept within 10−9m3/s to realize the quantitative dispensing of the high-viscosity multi-component adhesive.

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Correction: Crif1 deficiency in dopamine neurons triggers early-onset parkinsonism

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Molecular psychiatry 2023年第10期28卷 4485页

作者： Jun Young Heo Ah Hyung Park Min Joung Lee Min Jeong Ryu Yong Kyung Kim Yun Seon Jang Soo Jeong Kim So Yeon Shin Hyo Jin Son Thor D Stein Yang Hoon Huh Sookja K Chung Song Yi Choi Jin Man Kim Onyou Hwang Minho Shong Seung Jae Hyeon Junghee Lee Hoon Ryu Daesoo Kim Gi Ryang Kweon Department of Biochemistry Chungnam National University School of Medicine Daejeon 35015 Republic of Korea. Department of Medical Science Chungnam National University School of Medicine Daejeon 35015 Republic of Korea. Infection Control Convergence Research Center Chungnam National University School of Medicine Daejeon 35015 Republic of Korea. Department of Brain and Cognitive Sciences Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea. Research Center for Endocrine and Metabolic Diseases Department of Internal Medicine Chungnam National University School of Medicine Daejeon 35015 Republic of Korea. Department of Biochemistry and Molecular Biology University of Ulsan College of Medicine Seoul 05505 Republic of Korea. Boston University Alzheimer's Disease Research Center and Department of Neurology Boston University School of Medicine Boston MA 02118 USA. VA Bedford Healthcare System Bedford MA 01730 USA. VA Boston Healthcare System Boston MA 02130 USA. Electron Microscopy Research center Korea Basic Science Institute Cheongju 28119 Republic of Korea. Faculty of Medicine & Dr Neher's Biophysics Laboratory for Innovative Drug Discovery State Key Laboratory of Quality Research in Chinese Medicine Macau University of Science and Technology Macau SAR China. State Key Laboratory of Pharmaceutical Biotechnology The University of Hong Kong Hong Kong SAR China. Department of Pathology Chungnam National University School of Medicine Daejeon 35015 Republic of Korea. Graduate School of Medical Science and Education Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea. Brain Science Institute Korea Institute of Science and Technology Seoul 02792 Republic of Korea. Brain Science Institute Korea Institute of Science and Technology Seoul 02792 Republic of Korea. hoonryu@kist.re.kr. Department of Brain and Cognitive Sciences Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of

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Impact of Household Consumption Activities on Energy Consumption in China—Evidence from the Lifestyle Perspective and Input-output Analysis

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Energy Procedia 2017年 105卷 3384-3390页

作者： Qun Ding Wenjia Cai Can Wang Ministry of Education Key Laboratory for Earth System Modeling and Center for Earth System Science Room S925 Meng Minwei Science Building Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) and School of Environment Tsinghua University Beijing 100084 China

The household sector has become the second largest consumer of final energy, ranking only next to the industrial sector in China. Except for the direct energy consumption of household sector, people's consumption activities also indirectly affect the energy consumption of multiple production sectors. This paper investigates the direct and indirect impact of household consumption activities on energy consumption in China from the consumers’ lifestyle perspective based on the input-output analysis. The results show that China's energy consumption caused by household consumption activities in 2012 accounts for 24.7% of the total finial energy consumption. The indirect energy consumption of household consumption activities is 1.35 times more than the direct energy consumption. Residential activities cause the most indirect energy consumption, while the smelting and pressing industry of ferrous metal is the most energy-consuming industrial sector influenced by household consumption. We also find that the low-carbon pattern and accelerated technological advance can reduce the indirect energy consumption effectively by scenario analysis.

关键词： household consumption energy consumption input-output analysis energy conservation

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Using Sectoral Approach as Complement to the INDC Framework: An Analysis Based on the CGE Model

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Energy Procedia 2017年 105卷 3433-3439页

作者： Yaqian Mu Can Wang Wenjia Cai State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) and School of Environment Tsinghua University Beijing 100084 China Ministry of Education Key Laboratory for Earth System Modeling and Center for Earth System Science Room S925 Meng Minwei Science Building Tsinghua University Beijing 100084 China

Although 169 Intended Nationally Determined Contributions (INDC) have been submitted up to June 2016, there is still around 1.2-1.7 Gillion tons’ CO 2 emission gap in 2030 to realize the 2 °C target. The main objectives of this paper are to analyze the significance and feasibility of conducting a sectoral approach as complement to cover the emission gap on the base of INDC framework. The scenario analysis in this paper take three key sectors, electricity, iron and steel (IST) and cement, into consideration. The results affirmed the earlier judgment that additional sectoral reduction in the electricity sector could significantly reduce global CO 2 emissions. As a result, this study suggests developing consistent sectoral targets for the electricity sector together with the pledged INDC targets. To conduct this sectoral approach, at least 4070.7 million dollars of extra expenditure are required from developed countries to cover the loss of developing countries, but the results of this investment could be as much as 154 million tons’ CO 2 reductions. This paper also concludes with suggestions such as aggressive global mitigation pledges and deeper international cooperation on sectoral technology.

关键词： INDC Energy Policy Sectoral Reduction Technological Benchmark CGE Model

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Achieving China's INDC: Biomass Development and Competition for Land

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Energy Procedia 2017年 105卷 3521-3526页

作者： Jingxuan Hui Wenjia Cai Can Wang Ministry of Education Key Laboratory for Earth System Modeling and Center for Earth System Science Room S925 Meng Minwei Science Building Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) and School of Environment Tsinghua University Beijing 100084 China

In order to mitigate the climate change, China submitted its ambitious goal of INDC to the UNFCCC in 2015. In INDC, China has promised to lower the carbon dioxide emission and increase the share of non-fossil fuels in primary energy consumption. Such an emissions trajectory for the China's INDC would require marked development of biomass power. However, there are few research has quantitatively calculated the biomass demand and supply under INDC target. To fill this gap, we developed an integrated model which coupled the MESEIC model and two types of biomass supply database. The study results indicate that, to achieve the INDC target, it is noteworthy that the share of biomass is predicted to increase from 0.18% in 2010 to 10.20% and 20.06% in 2030 and 2050 respectively. However, current field residue in China is not enough to meet the biomass need in the northeast, northwest and south region. In order to meet the biomass need and ensure the food security, the grass land in Inner Mongolia, the forest in Heilongjiang, the grassland in the northwest region and the forest in the south region should be developed to produce biomass material.

关键词： INDC biomass land-use field residure

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Response surface modeling-based source contribution analysis and VOC emission control policy assessment in a typical ozone-polluted urban Shunde,China

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Journal of Environmental Sciences 2017年第1期29卷 294-304页

作者： Zhiqiang You Yun Zhu Carey Jang Shuxiao Wang Jian Gao Che-Jen Lin Minhui Li Zhenghua Zhu Hao Wei Wenwei Yang Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China USEPA/offilce of Air Quality Planning&Standards RTPNC 27711USA Chinese Research Academy of Environmental Sciences Beijing 100012China Department of Civil Engineering Lamar UniversityBeaumontTX 77710-0024USA Guangzhou Urban Environmental Cloud Information Technology R&D Co.Ltd Guangzhou 511400China

To develop a sound ozone（O_3） pollution control strategy,it is important to well understand and characterize the source contribution due to the complex chemical and physical formation processes of O_*** the ＂Shunde＂ city as a pilot summer case study,we apply an innovative response surface modeling（RSM） methodology based on the Community Multi-Scale Air Quality（CMAQ） modeling simulations to identify the O_3 regime and provide dynamic analysis of the precursor contributions to effectively assess the O_3 impacts of volatile organic compound（VOC） control *** results show that Shunde is a typical VOC-limited urban O_3 polluted *** ＂Jiangmen＂ city,as the main upper wind area during July 2014,its VOCs and nitrogen oxides（NO_x） emissions make up the largest contribution（9.06%）.On the contrary,the contribution from local（Shunde） emission is lowest（6.35%） among the seven neighbor *** local VOCs industrial source emission has the largest contribution comparing to other precursor emission sectors in *** results of dynamic source contribution analysis further show that the local NO_x control could slightly increase the ground O_3 under low（10.00%） and medium（40.00%）reduction ratios,while it could start to turn positive to decrease ground O_3 under the high NO_x abatement ratio（75.00%）.The real-time assessment of O_3 impacts from VOCs control strategies in Pearl River Delta（PRD） shows that the joint regional VOCs emission control policy will effectively reduce the ground O_3 concentration in Shunde.

关键词： O_3 Response surface model Source contribution analysis VOCs control policy

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Exploration on the value innovation of Energy Internet demonstration park

Exploration on the value innovation of Energy Internet demon...

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IEEE Conference on Energy Internet and Energy system Integration

作者： Lin Cheng Ning Qi Liting Tian Rong Li Shumin Sun State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Tsinghua University Beijing China State Grid Shandong electric power company Shandong China

With the rapid development of Energy Internet, Energy Internet demonstration park has become the focus of international academy and industry. In this paper, main characteristics and objectives of Energy Internet demonstration park are analyzed and the architecture of Energy Internet demonstration park composed of the physical layer, information layer, and operation layer has been proposed. Moreover, both the old and new value of multi-energy complementary is summarized and discussed. Finally, numerical analysis of the demonstration Park is used to explore the value innovation mentioned above.

关键词： Energy internet Demonstration park Value innovation Multi-energy complementary Practice exploration

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Analysis of Ultra-Low Frequency Oscillation in Southwest Power Grid Based on Measurement Data

Analysis of Ultra-Low Frequency Oscillation in Southwest Pow...

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Chinese control Conference

作者： Guoqiang Ding Ancheng Xue Chao Zheng Jiawei Wang Baisi Liu Xin Zhang Tianshu Bi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University Changping District Beijing China State Grid Southwest Power Control Center Chengdu Sichuan Province China China Electric Power Research Institute Haidian District Beijing China

The ultra-low frequency oscillation (ULFO) is found in the future Southwest Power Grid under some faults, which will asynchronous interconnect with the state Grid via the HVDC and VSC-HVDC at the end of the 2018. This paper introduces the phenomenon of ultra-low frequency oscillation of asynchronous interconnection in Southwest Power Grid and analyzes the characteristics of ultra-low frequency oscillation with measurement data. In details, the energy flow calculated with the measure data is used to evaluate the contribution of each unit to the ultra-low frequency oscillation and locate disturbance sources of the oscillation. Meanwhile, the amplitude-phase characteristic for the oscillation at the different power plant is used to identify that the oscillation is mainly manifests between the hydropower units and the thermal power units. Furthermore, the damping characteristics of the excitation and governor system analysis reveals that the main factor of the oscillation is the lack of the damping or negative damping characteristic of the hydro-turbine governor systems.

关键词： Oscillators Power grids Damping Frequency measurement Hydroelectric power generation Generators

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Study on air distribution system of 350MW supercritical boiler

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IOP Conference Series: Earth and Environmental Science 2019年第3期227卷

作者： Zhipeng Jiang Yingai Jin Zhiyu Song Weiwei Jiang Mingyu Quan State key laboratory of automotive simulation and control Jilin university Changchun 130022 China College of Automotive Engineering Jilin University Changchun 130022 China Jilin Province Electric Power Science Research Institute Co. Ltd Changchun 130021 China.

In order to explore the best air distribution scheme, and set up a air distribution test bench, which is according to the similarity principle, in this paper, a 350MW supercritical boiler of a power plant is taken as the research object. This test the selection of fan power and the design of bellows and air duct size is according to the similarity principle. According to the test procedure, the resistance coefficient and flow rate of the damper are measured when the single and each damper is changed. It is found that the drag coefficient and flow rate are greatly affected by the opening of the damper. When the opening of the damper changes from 15 to 30 degree, they both change dramatically. When the opening of the damper is greater than 30 degree, the change of them tends to be stable. At the same time, different locations of damper will interact with each other. The resistance coefficient curve is not only plays a guiding role in the manual control of the old equipment, but also plays a vital role in the programming of the modern automatic control of the damper. At the same time, the flow distribution law plays a guiding role in the design of the air distribution control system. The resistance coefficient curve and the flow distribution curve obtained in this paper can play a guiding role in the test design and boiler operation regulation of power plant.

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