检索结果-内蒙古大学图书馆

IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Li-Qiang Jin Chuan-Xue Song Chang-Jian Hu Department of Automotive Engineering State Key laboratory of Automobile Dynamic Simulation Jilin University Changchun China

In this paper, a new technology of power steering for in-wheel-motor driven electric vehicles has been developed. Through controlling the driving torque of the two in-wheel traction motors, a proper power steering assist torque can be generated, which can be used to compensate the assist steering torque generated by hydraulic pump or direct power steering motor, or even completely make them unnecessary. Therefore, the power steering system can be designed with more compactness, and operated with high efficiency and less maintenance requirement.

关键词： Power steering Electric vehicles Wheels Torque control Traction motors Vehicle driving Hybrid electric vehicles Propulsion Turning Power generation

来源：评论

学校读者我要写书评

暂无评论

Rapid algorithm based on mesh to determine stamping direction of automobile panels

引用

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 2009年第1期39卷 88-92页

作者： Di, Chi Song, Yu-Quan Zheng, Guo-Jun Guo, Wei College of Materials Science and Engineering Jilin University Changchun 130022 China State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun 130022 China

The stamping direction is important for the forming quality of automobile panels. To determine the reasonable direction of the panel, taking the stamping direction vector as design variable based on mesh data of automobile panels, an algorithm model was established based on the criteria such as avoidance of dead angle, minimization of drawing depth, and maximization of initial contact area. The corresponding program module was developed in Visual C++ using unit sperical mesh intersection algorithm to get the feasible stamping direction vector domain rapidly. The feasibility of the algorithm was proved by the creation of stamping directions of some practical parts and the relevant numerical simulation of stamping depth.

关键词： Stamping

来源：评论

学校读者我要写书评

暂无评论

Quantify the landscape effect and environmental sustainability of rural re(g)ion planning at town scale near metropolis

引用

中国高等学校学术文摘·地球科学 2009年第1期3卷 112-117页

作者： Shiliang LIU Yuhong DONG Minxia WEN Bin CHEN State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal UniversityBeijing 100875 China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Yucheng Comprehensive Experimental Station Beijing 100101 China

The urban fringe, which can be seen as a special form of regional ecosystem with a spatial transition from urban to rural areas, has strong heterogeneity and is a typical ecologically sensitive area. The expansion of cities and the landscape effect of the changes have attracted wide attention. The primary aim of this study is to obtain an understanding of the spatial patterns of landscape conversion and the corresponding environmental sustainability. With the help of GIS and Fragstats software, the changes of landscape patterns before and after town planning were compared in An-Ding town of Beijing, of which the sustainability was also revealed based on the ecological footprint using social and economic statistic data. Theresults showed that the landscape pattern changed greatly during its conversion from several villages to a small town and the landscape fragmentation increased due to road construction. Meanwhile, human disturbance increased with the constructed land extension. For the gap between the ecological footprint and the biological capacity, AnDing town ran an ecological deficit at that period, which means it was unsustainable. However, the environmental sustainability decreased after planning due to the degraded green land and forest. The results suggested that ecological management should be strengthened during the town planning period.

关键词： environmental sustainability landscape ecological footprint ecological capacity town development

来源：评论

学校读者我要写书评

暂无评论

Study on electromagnetic actuator active engine mount with fuzzy control

Study on electromagnetic actuator active engine mount with f...

引用

IEEE International Conference on Mechatronics and Automation

作者： Tian-ye Liang Wen-ku Shi Jilin University Changchun Jilin CN State Key Laboratory of Automobile Dynamical Simulation Jilin University China

The authors have developed a new type of active engine mount. The active engine mount is consisted of an electromagnetic actuator and an inertia-modulator hydraulic mount. The decoupler's motion is controlled by the dynamic force generated by the electromagnetic actuator .The pressure in the upper chamber is variational, as a result the total output force from the mount to the chassis is controlled. Fuzzy control method was chosen as the control method. Based on force analyses of system parts, a mathematical model of the active engine mount was established. An experimental device was designed and made. The experimental results indicated that the active engine mount can achieve better vibration isolation performance than passive engine mount.

关键词： Engines Fuzzy control Hydraulic actuators Coils Electromagnetic forces Force control Damping control systems Electromagnetic modeling Roads

来源：评论

学校读者我要写书评

暂无评论

The concept, connotation and method of representation of watershed water environment carrying capacity （WWECC）

引用

Journal of Environmental Science and Engineering 2009年第3期3卷 37-42页

作者： MENG Qing-bin ZHANG Xue SHEN Zhen-yao State Key Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beifing 100875 China

Based on the relationship between water environment system and human society, water environment carrying capacity （WECC） probes into supporting ability of complex water environment system to the human society. Recent years, due to the shortage of water resources and serious water pollution in several watersheds in China, the research of watershed water environment carrying capacity （WWECC） becomes very important. The conception, connotation and method of representation of WWECC are discussed deeply in this paper. It shows that WWECC is a kind of index that instructs whether the water environment system in watershed can continue to support the development of social economy and ecology, it is dimensionless number.

关键词： watershed water environment carrying capacity（WWECC） water environment carrying capacity （WECC） conception connotation method of representation

来源：评论

学校读者我要写书评

暂无评论

Occupant position recognition with seat surface pressure distributions and support vector machines classifier

引用

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2009年第7期45卷 216-220页

作者： Gao, Zhenhai Xiao, Zhenhua Li, Hongjian State Key Laboratory of Automobile Dynamics Simulation Jilin University Changchun 130022 China China FAW Group Corporation R and D Center Changchun 130011 China

In the intelligent airbag system, the detection accuracy of occupant position is the precondition and plays a vital role in controlling airbag detonation time and inflation strength during the crash. Through accurately analyzing the seat surface pressure distributions of different occupant sitting position and types, an occupant position recognition algorithm which purely uses occupant pressure distribution information measured by seat pressure sensors is presented with the method of support vector machine. The distribution samples with different occupant sitting positions and types are used to train and test the recognition algorithm, thus verifying its validity and accuracy. © Journal of Mechanical Engineering.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

UKF and EKF estimator design based on a nonlinear vehicle model containing UniTire model

UKF and EKF estimator design based on a nonlinear vehicle mo...

引用

IEEE International Conference on Mechatronics and Automation

作者： Zhao Pan Changfu Zong Jiahao Zhang Xujun Xie Yiliang Dong State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China Institute of Automotive Engineering Changan Automobile Holding Limited Chongqing China

Dynamic model based vehicle state variables observer is a step towards economical on-board sensing system. However a complex model always leads to a control system with a poor real-time performance, while a simple model cannot exhibit real characteristics of a vehicle. In order to make an accurate and sententious estimate for yaw rate and side slip angle, an ameliorated 2-DOF bicycle model containing UniTire model is introduced. Then two observers based on Extended Kalman Filter (EKF) and Unscented Kalman Filter (UKF) are introduced. And validity of the two algorithms is verified by simulation test and contrast is brought out respectively. The simulation results show that the UKF based observer performs better in accuracy and computing speed.

关键词： Tires state estimation control systems Vehicle dynamics Observers Testing Nonlinear dynamical systems Automotive engineering control system synthesis Real time systems

来源：评论

学校读者我要写书评

暂无评论

Parameter matching for hybrid plug-in bus

Parameter matching for hybrid plug-in bus

引用

IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Xiaohua Zeng Qingnian Wang Dafeng Song Yongtao Yu State Key Laboratory of Automobile Dynamical Simulation Jilin University ChangChun City China State Key Laboratory of Automobile Dynamical Simulation Jilin University Changchun China College of Automotive engineering Jilin University Changchun China Department of Mechanical Engineering Michigan University MI USA

Based on the first generation of hybrid electric city bus CA6110HEV developed by FAW (First automobile Workshop) in China, the new generation of hybrid plug-in bus was designed, mainly including the parameters matching for the power-train and power sources. Then simulation platform were developed and established. The dynamic and economy performances were predicted based on the above work, results showed that the designed hybrid plug-in bus can meet the performance demands and validated rationality of the parameters matching.

关键词： Vehicle dynamics Aerodynamics Acceleration Power generation Hybrid power systems automobiles Axles Battery powered vehicles Laboratories Automotive engineering

来源：评论

学校读者我要写书评

暂无评论

Wavy road elevation measurement based on the principle of inertia

Wavy road elevation measurement based on the principle of in...

引用

9th International Conference of Chinese Transportation Professionals, ICCTP 2009: Critical Issues in Transportation System Planning, Development, and Management

作者： Han, Y. Wang, H. State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China School of Automobile Chang'an University Xi'an 710064 China School of Electronic and Control Engineering Chang'an University Xi'an 710064 China

ISBN: (纸本)9780784410646

Precision Level is widely used to measure road elevation. The measuring process needs several cooperating people to complete. The measuring error is not easily to be controlled due to the artificial influence. A wavy road elevation measurement method is proposed in this paper based on the principle of inertia. This equipment mainly consists of a gyro, a three-axis accelerometer and a photoelectric encoder. When moving on the road at a high speed, it can real-timely measure the running speed and the pitch angle of the car, from which the road elevation can be obtained by data processing. The advantage of this method is simple, high speed and easy to achieve, it can be applied to measure the wavy road elevation. © 2009 ASCE.

关键词： Data handling

来源：评论

学校读者我要写书评

暂无评论

Power load modeling based on wide-area measurements and support vector machine

Power load modeling based on wide-area measurements and supp...

引用

2009 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2009

作者： Wang, Zhenshu Li, Linchuan Niu, Li Key Laboratory of Power System Simulation and Control Ministry of Education Tianjin University Tianjin China School of Electrical Engineering Shandong University Jinan China State Nuclear Electric Power Design and Research Institute Beijing China

ISBN: (纸本)9781424424870

At present, the load modeling is still one of the difficult problems in power system. In this paper, a new method is presented which uses wide-area measurements and support vector machine (SVM) for load modeling. Based on wide-area measurements, this method does non-linear regression analysis on model with SVM. By using radial basis function (RBF), model structure is optimized, and Bayesian Framework is used for identifying parameters, then a kind of non-mechanical model is founded. This method can easily solve the problems in choosing structure and identifying parameters. The founded model has good generalization ability, flexible structure, and rapid calculation speed. In the end, this method has been programmed;the simulation verifies the validity of this model. © 2009 IEEE.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：