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The 2015 International Conference on Advanced Materials and Engineering Structural Technology(ICAMEST 2015)

作者： D.N.Yu Y.Wang C.D.Su J.M.Liu State Key Lab of Automobile Simulation and Control Jilin University

This thesis firstly put forward the integral mechanical thermal expansion forming process during the heavy duty vehicle rear axle *** blank tube pretreatment,preliminary expansion forming,radial expansion forming,axial shaping and so *** advanced forming technology do not use the traditional technology forming process which need triangle panel to weld after the *** the technology,we achieved the goals that material savings,improve efficiency and reducing the *** is significant in heavy duty vehicle rear axle housing actual production guidance.

关键词： Research on integral mechanical thermal expansion forming process of heavy duty vehicle rear axle housing

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Adaptive Sliding Mode control of Flexible Load Driven by Motors considering the damping

Adaptive Sliding Mode Control of Flexible Load Driven by Mot...

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International Conference on Electrical Machines and Systems

作者： Youshuang Ding Xi Xiao State Key Lab of Security Control and Simulation of Power Systems and Large Scale Generation Equipment Department of Electrical Engineering Tsinghua University China

ISBN: (纸本)9781467388634

This paper presents an adaptive sliding mode controller for the system of flexible load driven by motors with the damping and friction considered. The controller comprised the sliding mode controller and the Kalman estimator. Firstly, the parameter uncertainties and disturbance are modeled with a bounded variable and then an integral sliding surface is designed. Then, to relax the requirement for the bound of uncertainties, a Kalman state estimator is proposed to estimate the bound of uncertainties and the unmeasurable states. With the proposed control structure, the vibration caused by the flexibility can be suppressed and besides, the controller is robust to a wide range of parameter uncertainty and disturbance. The performance of the control strategy is verified via simulation and experimental results.

关键词： Flexible joint flexible manipulator sliding mode adaptive Kalman filter

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Nonlinear Model Predictive control of Blowout Tire Vehicles and Its Map-based Implementation

Nonlinear Model Predictive Control of Blowout Tire Vehicles ...

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第三十四届中国控制会议

作者： Fei Wang Hongyan Guo Hong Chen State Key Lab. of Automotive Simulation & Control Jilin Univ. Jilin China

ISBN: (纸本)9781467374439

A blowout is a rapid loss of inflation pressure of a pneumatic tire. In order to reduce the fatal damage of tire blowout during vehicle operation, a differential flatness based 3 degrees of freedom (DOF) vehicle dynamics model with a deflated tire is established. The model predictive controller designed based on this method can guarantee that the vehicle after a tire blowout can drive safely until it comes to a complete stop. Due to the heavily online computational burden, it is actually difficult to implement nonlinear model predictive control (NMPC) scheme in the quick-response control system. In this paper, a novel control strategy is proposed to solve this problem and applied to the control of vehicles after a tire blowout. The involved optimization problem of NMPC is solved off-line in the operating points which then are recorded into a control map. simulation results are provided to verify the effectiveness of the proposed control strategy.

关键词： Calibration of Maps NMPC Tire Blowout nonlinear model predictive control control strategy vehicle Vehicle operations inflation pressure FAST-RESPONSE PNEUMATIC TIRE

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Quasi-Uniform Magnetic Field Generated by Multiple Transmitters of Magnetically-Coupled Resonant Wireless Power Transfer

Quasi-Uniform Magnetic Field Generated by Multiple Transmitt...

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International Conference on Electrical Machines and Systems

作者： Yiming Zhang Ting Lu Zhengming Zhao Fanbo He Kainan Chen Liqiang Yuan State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing China

ISBN: (纸本)9781479988068

Magnetically-coupled resonant wireless power transfer (MCR-WPT) has been a research focus in recent years. Multiple transmitters are employed to improve efficiency in a wide area. In this paper, the MCR-WPT system with two transmitters supplied by the same source is modeled and its equivalent circuit is depicted. The mutual inductance between the two transmitters is considered. Proper connection of the transmitters results in the enhancement of the magnetic field in certain areas. Based on the circuit theory, the explicit expression of the efficiency is derived. The quasi-uniform magnetic field and roughly equal efficiency are analyzed.

关键词： magnetic resonance multiple transmitters uniform magnetic field wireless power transfer

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Operation optimization of integrated power and heat energy systems and the benefit on wind power accommodation considering heating network constraints

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Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 2015年第14期35卷 3596-3604页

作者： Gu, Zepeng Kang, Chongqing Chen, Xinyu Bai, Jianhua Cheng, Lu State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Haidian District Beijing100084 China State Grid Energy Research Institute Changping District Beijing102209 China

With the continuous growth of the installed capacity of wind power in China, the ability of integrating wind power becomes the bottleneck of its development. The electricity generation is determined by the heat supply in the heating period, so that the peak shaving capacity of the combined heat and power (CHP) units is limited by the heat demand, which restricts the wind power integration. Breaking this traditional operation mechanism and interacting the power system with the heating system is the key to alleviate the problem of wind power curtailment. This paper considered the heating network constraints and built up the model of the heating network which could be used in integrated energy systems. Based on it, an operation optimization model of the integrated power and heat energy systems which considered the heating network constraints and thermal unit commitment was proposed. Using this model, this paper proved that coordination the power system with the heating system could play an active role in the promotion of wind power integration. Besides, the impacts of the transmission capacity, the transmission delay and the transmission loss of the heating network were analyzed. © 2015 Chinese Society for Electrical Engineering.

关键词： Wind power

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MPC-Based Regional Path Tracking controller Design for Autonomous Ground Vehicles

MPC-Based Regional Path Tracking Controller Design for Auton...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Ru Yu Hongyan Guo Zhenping Sun Hong Chen State Key Laboratory of Automotive Simulation and Control Jilin University College of Mechatronics and Automation National University of Defense Technology Changsha China State Key Lab. of Automotive Simulation & Control Jilin Univ. Coll. of Commun. Eng. China

ISBN: (纸本)9781479986989

Path tracking issues of autonomous ground vehicles (AGVs) have attracted more attention in recent years with the intelligent and electrified development of vehicles. In order to make AGVs path tracking problem more flexible, regional path tracking problem is discussed in this manuscript based on model predictive control (MPC) method, where the front wheel steering angle is regarded as the control variable. The feasible region for AGVs running is determined first according to the detected road boundaries. In the following, AGVs running in this region is considered using kinematic model. Then, in order to make the actual trajectory of AGVs keep in the region and satisfy the safety requirements, MPC method is employed to design path tracking controller considering the vehicle dynamics, the actuator and state constraints. In order to verify the effectiveness of the proposed algorithm, simulations under various test conditions are carried out using a high fidelity vehicle simulator veDYNA, where the Hongqi vehicle HQ430 parameters are matched. The results obtained from the simulation illustrate that the proposed algorithm obtains good performance in dealing with the regional path tracking problem.

关键词： Roads Wheels Kinematics Vehicle dynamics Land vehicles Tires

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Ordinal optimization theory based planning for clustered wind farms considering the capacity credit

Ordinal optimization theory based planning for clustered win...

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第13届全国博士生学术年会——新能源专题

作者： Yi Wang Chongqing Kang Ning Zhang Qianyao Xu Rui Shi Hui Li Jinyu Xiao Zhidong Wang Shuai Wang State Key Lab of Control and Simulation of Power Systems and Generation Equipment (Department of Ele State Power Economic Research Institute ChangpingDistrictBeijing 102209China

Wind power planning aims at optimally locating and sizing wind ***,it tends to choose the wind farms with the richest wind resource in order to maximize the energy ***, the capacity benefit of wind power should also be considered in the large-scale clustered wind farm planning since the correlation among the wind farms performs an obvious influence on the capacity benefit brought by the whole wind *** paper proposes a planning model considering both energy and capacity benefit of the wind ***, the capacity benefit is evaluated by wind power capacity *** Ordinal Optimization (OO) theory, capable of handling problems with non-analytical forms, is applied to address the *** verify its feasibility and advantages, the proposed model is compared with widely-used genetic algorithm (GA) via a modified IEEE RTS-79 system and a real world case of Ningxia, *** results show that the diversity of wind farm enhances the capacity credit of wind power.

关键词： Capacity credit Correlation Ordinal Optimization Planning Wind power

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Fault Line Identification of Single Line to Ground Fault for Non-Effectively Grounded Distribution Networks with Double-Circuit Lines

Fault Line Identification of Single Line to Ground Fault for...

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IEEE Power and Energy Society General Meeting

作者： Bo Jiang Xinzhou Dong Shenxing Shi Bin Wang State Key Lab. Of Control and Simulation of Power System and Generation Equipment Dept. of Electrical Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9781467380416

Single Line to Ground (SLG) faults in non-effectively grounded networks are difficult to detect. Immune to neutral point grounding type, load conditions and system operation conditions, traveling-wave based method is an effective fault line identification method. However, due to the strong coupling between the double-circuit lines, the wavefront magnitude of them are the same, and the polarity of them are opposite. Thus, the mal-identification will be resulted under such condition. This paper analyzed the traveling wave characteristics of double-circuit lines, and proposed an improved fault line identification method based on the initial process of zero sequence currents and voltage traveling waves. Tests show that, the proposed method has high effectiveness in fault line identification of double-circuit lines in distribution networks.

关键词： distribution networks double-circuit fault line identification non-effectively grounded traveling wave Double circuit Power grids line down Earth faults traveling waves single line

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Analysis on Lightning Current and Position During Shielding Failure of High Voltage AC Transmission Lines

Analysis on Lightning Current and Position During Shielding ...

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2015 International Conference on simulation, Modelling and Mathematical Statistics(SMMS 2015)

作者： Shan-qiang GU Zhan-qing YU Xuan ZHOU Ze-zhong WANG Tong ZHU Bi-wu YAN Jin-liang HE Rong ZENG Chi-jie ZHUANG Electric Power Research Institute China State Grid LTD State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University

Shielding failure of lightning is the key problem for safe operation of transmission lines. Compare to Electro-geometry Method, Leader Progress Method more suitable for lightning protection analysis because the physical model is used instead of empirical formula. The relationship between amplitude of lightning current and other parameters, such as wires position, ground tilt angle, was analyzed.

关键词： Lightning stroke Shielding failure Transmission Line Leader progress

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Transmission expansion planning modelfacilitating low-carbon power sources' development

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Dianwang Jishu/Power System Technology 2015年第10期39卷 2725-2730页

作者： Du, Ershun Sun, Yanlong Zhang, Ning Chen, Songsong He, Guixiong Kang, Chongqing State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing100084 China China Electric Power Research Institute Haidian District Beijing100192 China

Power planning oriented to low-carbon can relief 'carbon lock' effect and facilitate to achieve low-carbon power system. For tapping low-carbon potential of power grid, this paper comprehensively analyzes corresponding low-carbon elements and proposes a novel transmission planning model for promoting low-carbon power sources' development. These analyses include facilitation of integration and accommodation of renewable power, life cycle carbon emission process and reduction of grid loss. Based on multi-scenario technique, the proposed model minutely simulates system operation process considering both typical and extreme operation constrains. Through inequality separation and piecewise linearization, original model is converted into a large scale mixed integer linear programming (MILP) model. Case study of Jiangsu provincial grid verifies validity of the proposed model. ©, 2015, Power System Technology Press. All right reserved.

关键词： Life cycle

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