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2010 International Conference on Computer, Mechatronics, control and Electronic Engineering, CMCE 2010

作者： Hao, Yuxiang Yang, Xiaoping Chen, Hong Guan, He State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China College of Communication Engineering Jilin University Changchun China

ISBN: (纸本)9781424479566

The traditional PID controller parameters are hard to tune timely under the rapid changes of the dynamic network circumstances, which affect the PID algorithm's control effects on network data flows. To alleviate the problem, a novel AQM algorithm based on PID controller is proposed, called the improved expert intelligent PID algorithm (IEI-PID). By combining expert knowledge with PID and adding more detail control rules, the algorithm receive better control effect. The NS2 simulation has been done to compare IEI-PID with classic PID algorithm (CPID) and expert intelligent PID algorithm (EI-PID), and the former has superior performance. © 2010 IEEE.

关键词： Three term control systems

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Research on the state observer of the vehicle body slip angle based on the Recursive Least Squares

Research on the state observer of the vehicle body slip angl...

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2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010

作者： Chu, Liang Ou, Yang Zhang, Yongsheng Xu, Mingfa Shi, Yanru State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China College of Automotive Engineering Jilin University Changchun China

ISBN: (纸本)9781424476541

The estimation of the body slip angle is the key problem in the electronic stability control system design. In this paper a state observer of the vehicle body slip angle is designed by considering the variation of the vehicle model parameters timely, which are effected by the maneuvers. In order to get a better state estimation value, the tire cornering stiffness is identified online based on the Recursive Least Squares (RLS). According to the results of simulation, the state observer with sufficient robustness can be used to overcome the impact of model error and the effectiveness of the observer can be verified by the simulation. © 2010 IEEE.

关键词： state estimation

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Implementation of software router embedded PID AQM algorithm in the communication test network

Implementation of software router embedded PID AQM algorithm...

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2010 International Conference on Computer, Mechatronics, control and Electronic Engineering, CMCE 2010

作者： Guan, He Yang, Xiaoping Chen, Hong Zhang, Zhiwei State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China College of Communication Engineering Jilin University Changchun China

ISBN: (纸本)9781424479566

At present, most studies on the communication are based on simulation, but any theory needs to stand the test of the physical environment. This paper implements the embedding of PID AQM algorithm in software router-IPCop in the communication test network. And the comparison of results from NS2 simulation and the communication test network proved that the embedding method was correct. The method of embedding the new algorithm in software router has been proposed in this paper, which means the AQM algorithm is applied to the real network environment. © 2010 IEEE.

关键词： Software testing

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Design of a robust side slip angle observer using adaptive Kalman filter

Design of a robust side slip angle observer using adaptive K...

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2010 International Conference on Computer Design and Applications, ICCDA 2010

作者： Chu, Liang Zhang, Yongsheng Xu, Mingfa Shi, Yanru Yang, Ou State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China College of Automotive Engineering Jilin University Changchun China

ISBN: (纸本)9781424471638

In order to meet the cost requirement of side slip angle measured directly in vehicle active safety control systems, a new combined observer for estimating side slip angle is proposed. In the observer, the adaptive Kalman filter and full-order state observer are employed. Effectiveness of presented method is confirmed by simulation of sinusoidal driving and double lane maneuver. The results show that the proposed method has good robustness and accuracy both in tire linear and nonlinear area. © 2010 IEEE.

关键词： Bandpass filters

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Research on multi-objective decision model based on location-allocation analysis during emergency traffic evacuation

Research on multi-objective decision model based on location...

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2010 IEEE International Conference on Emergency Management and Management Sciences, ICEMMS 2010

作者： Song, Shumin Yang, Zhaosheng Yang, Wei Zhang, Maolei College of Traffic and Transportation Jilin University Changchun China State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China

ISBN: (纸本)9781424460625

Large-scale emergency events bring a lot of effect to people's ordinary life, so it is necessary to provide fast and effective location-allocation analysis information for emergency traffic evacuation and succor. In this issue, some related models based on location-allocation analysis are introduced into emergency traffic evacuation field. Considering the actual situation and character of emergency traffic evacuation, we develop maximum covering models which are applied to emergency traffic evacuation and its optimized algorithm. Finally, we discuss some feasible solution strategies, and then get the large-scale emergency traffic evacuation plan, provide dependable decision-making support for succor. © 2010 IEEE.

关键词： Decision making

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High time resolution observation and statistical analysis of atmospheric light extinction properties and the chemical speciation of fine particulates

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Science China Chemistry 2010年第8期53卷 1801-1808页

作者： YAO TingTing1,HUANG XiaoFeng1,HE LingYan1,HU Min2,SUN TianLe1,XUE Lian1,LIN Yun1,ZENG LiWu1 & ZHANG YuanHang2 1key laboratory for Urban Habitat Environmental Science and Technology,School of Environment and Energy,Peking University Shenzhen Graduate School,Shenzhen 518055,China 2state key Joint laboratory of Environmental simulation and Pollution control College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China

In recent years,the visibility deterioration caused by regional fine particulate pollution becomes one of the crucial air pollution problems in the urban areas of our *** rapid variation of visibility and fine particulates make it difficult to estimate the relationship between them precisely and accurately unless high time resolution observation data can be *** study aims to fill this gap in the field of atmospheric science by establishing a formula using multiple linear *** fitting goodness (R2=0.913,n=3167) was obtained using 10 min average of high-resolution real-time light scattering coefficients,light absorption coefficients,main chemical speciation concentration in PM1 and some meteorological parameters from 17 Jan to 16 Feb,*** shows that the average light extinction coefficient during the observation in the winter of Shenzhen was measured to be 290 ± 183 Mm?1,consisting of 72% of light scattering and 21% of *** terms of the percentage contribution of PM1 chemical species to the total light extinction,the organic matter was estimated to be most with an average of 45%,followed by ammonium sulfate with an average of 24%.The contributions of black carbon and ammonium nitrate were 17% and 12%,***,the diurnal variation of light extinction was investigated as well in this study.

关键词： light extinction PM1 chemical speciation high time resolution multiple linear regressions

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BO-ARED: A New AQM Algorithm with Adaptive Adjustment of Parameters

BO-ARED: A New AQM Algorithm with Adaptive Adjustment of Par...

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The 8th World Congress on Intelligent control and Automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Hong Chen Yunqi Luo Xiaoping Yang Yuxiang Hao Department of Control Science and Engineering State Key Laboratory of Automobile Dynamic Simulation College of Communication Engineering State Key Laboratory of Automobile Dynamic Simulation Jilin Uni

To address the problems of network congestion, Active queue management (AQM) is advocated to improve the quality of services (QoS) for Internet. Random early detective (RED) algorithm is one of notably AQM mechanism, because it could reduce the high drop rate of bursty flows, avoid global synchronization among flows and reduces network latency (”ping time”). However, RED requires careful tuning of its parameters in order to provide good performance. For solving this problem, this paper proposes a new mechanism to improve RED algorithm, which is named BO-ARED (An Adaptive RED Algorithm Combined With Buffer Occupation). By matching router's buffer occupation with wq, minth, maxth and Pmax parameter settings, to make BO-ARED adapt to network environment variation automatically. The simulations take comparisons of the BOARED with RED, ARED and BORED. It is shown in the simulation results that BO-ARED algorithm maintains the great performance while network environment varies. It has low drop rate, low average delay time and high throughput with it adaptive parameters.

关键词： Delay Heuristic algorithms Quality of service Lead Adaptation model Internet Real time systems

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Fault diagnosis of direct-drive wind turbine based on support vector machine

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Journal of Physics: Conference Series 2011年第1期305卷

作者： X L An D X Jiang S H Li J Chen State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Thermal Engineering Tsinghua University Beijing 100084 China

A fault diagnosis method of direct-drive wind turbine based on support vector machine (SVM) and feature selection is presented. The time-domain feature parameters of main shaft vibration signal in the horizontal and vertical directions are considered in the method. Firstly, in laboratory scale five experiments of direct-drive wind turbine with normal condition, wind wheel mass imbalance fault, wind wheel aerodynamic imbalance fault, yaw fault and blade airfoil change fault are carried out. The features of five experiments are analyzed. Secondly, the sensitive time-domain feature parameters in the horizontal and vertical directions of vibration signal in the five conditions are selected and used as feature samples. By training, the mapping relation between feature parameters and fault types are established in SVM model. Finally, the performance of the proposed method is verified through experimental data. The results show that the proposed method is effective in identifying the fault of wind turbine. It has good classification ability and robustness to diagnose the fault of direct-drive wind turbine.

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Research on the correlative stability of a 2 DOF articulated vehicle

Research on the correlative stability of a 2 DOF articulated...

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2010 International Conference on Computer, Mechatronics, control and Electronic Engineering, CMCE 2010

作者： Yang, Zhang Liu, Xinhui Wang, Tongjian Institute of Mechanical Science and Engineering Jilin University Changchun China State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun China

ISBN: (纸本)9781424479566

A wheeled mobile vehicle with 2 DOF articulated frame (2DWAV) is presented in this paper. This vehicle can improve the rough-terrain mobility and stability by reshaping its articulated frame. The analysis completes about the influence that the stability of single body's worked on the entire frame stability. For the unique 2 DOF articulated frame, we propose the new concept of correlative stability. The kinematical equations which based on the three-dimensional coordinate form the kinematics model of the articulated vehicle system. The correlative stability angle is achieved by using static stability analysis and multi-body kinematics. © 2010 IEEE.

关键词： Stability

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Test on automobile engine noise production sourse and impact based on sound intensity method

Test on automobile engine noise production sourse and impact...

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2nd Conference on Environmental Science and Information Application Technology, ESIAT 2010

作者： Wang, Hai-Wei Lin, Xue-Dong Kui, Hai-Lin Wang, Yun-Peng College of Transportation Jilin University Changchun 130022 China State Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun 130022 China

ISBN: (纸本)9781424473885

In this paper, we tested the GW 2.4S automobile engine and Mitsubishi2.4S automobile engine by adopting sound intensity method. During the experiment we got the spectrum graph, and by matching the spectrum peak from the spectrum graph and spectrum peak from the total engine noise to conclude the main noise source. By comparing Peak of the low frequency and the high frequency at the different measuring surface of the engine, we can speculate the engine's noise source, and then we can get different types of engine's noise source at the different frequency. After that, these two engines' noise source is estimated by using the sound power from the each side of these two engines. Mechanical noise and combustion noise also can be separated preliminary. ©2010 IEEE.

关键词： Acoustic intensity

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