Steering Angle Balance Control Method for Rider-less Bicycle Based on ADAMS

[交通会议论文数据库] Feng Yuanyuan u Runjia Xu Yuping

摘要:　　Bicycle is a typical unstable system.Although it is partly similar to the inverted pendulum systems, the complex mechanical characteristics cause that it is difficult to be analyzed and controlled.In this paper, Constrained Lagrangian method is used to building a rider-less bicycle dynamic model.Through the analysis of the dynamic model, the control system is designed to be divided into two parts: the forward control and the balance control.The rear wheel gets a stable speed by controlling the torque of the motor.Steering Angle Balance Control method is designed to keep the system balance.Use ADAMS to simulate a rider-less bicycle control system.The simulation shows that using Steering Angle Balance Control method can balance the bicycle to run forward and swerve stably.

Comparative Analysis the Rectifier Part of Electric Locomotive Auxiliary Converter

[交通会议论文数据库] Zhang Quanzhu Lu Xiaohui Lei Min eng Yonghong

摘要:　　Based on the development of the auxiliary converter of SS4B electric locomotive, the key research is focused on the front stage of the rectifier.Comparative analysis the two widely used in the auxiliary converter circuit topology (PWM rectifying circuit and phase-controlled rectifier), and finally choose the phase controlled rectifier circuit for auxiliary converter front stage the rectification scheme.

Analysis of Vehicular Behavior at Bottlenecks Considering Lateral Separation

[交通会议论文数据库] X.Shen

摘要:　　The vehicular behaviors at bottlenecks are complex, and lateral separation makes traffic flow more

Research on Optimal Power Allocation Strategy Based on Finite Time Domain Prediction For Electro-Mechanical Transmission

[交通会议论文数据库] Yulong Zhao Weida Wang Changle Xiang Kun Huang

摘要:　　Electro-mechanical transmission (EMT), with power distribution strategy as its core technology, stands for the developing orientation of the heavy vehicles' transmission, which is able to fulfill power, fuel economy and electricity demand of the vehicles.In this paper, the mechanical and electrical power balance equations were established according to the split and convergence characteristics of the power coupling mechanism and power distribution unit.The power demand of the EMT is predicted through combination of the fixed-gain prediction algorithms and the input that driver's desired speed during the vehicle driving cycle.Then the optimal power distribution strategy based on finite horizon power prediction algorithm is achieved.Moreover, the optimal allocation pattern of the engine and motors is proposed.The rationality of control strategy is verified by the forward simulation results.

Simulation Research on Natural Light Illumination Change of Highway Tunnel Entrance

[交通会议论文数据库] ZHANG Yongqiang Guo Wei Hu Zhuang

摘要:　　During the process of vehicles in and out of the tunnel, the driver's vision is affected by light and dark adaptation.Natural light intensity outside tunnels is a decisive influence on the parameters of visual adaptation and tunnel lighting design.Using DIALux simulation software, the feasts typical natural light inside and outside the tunnel entrance and the illumination conditions change with distance of a Zhejiang highway tunnel were analyzed in this paper.The results show that: the most dramatic change of road illumination happens in the distance and outside the tunnel entrance road in the range of 5m;the effects of natural light illumination significantly reduced inside 10m of the tunnel;and inside the tunnel after 20m, the effects of natural light on the hole is weak.Finally, the methods to improve the road illumination difference of tunnel entrance were studied.

Application of FBG Sensors in High-pile Wharf Structure Monitoring System

[交通会议论文数据库] XU Jiashuai GE Guangshuang

摘要:　　Structure monitoring technology is gradually applied in the field of hydraulic structure;however, the traditional electrical sensor technology has some limitations in the field of hydraulic structure monitoring system, especially for long-term and real-time structure monitoring.In order to achieve long-term and real-time monitoring of hydraulic structures, Fiber Bragg Grating(FBG)sensor technology is adopted in engineering practice in this paper, and first used in a high-pile wharf structure monitoring system of a supported project, the results of loading test and finite analysis verified that FBG sensors have great advantages in hydraulic structure monitoring.

Weight-dependent Equilibrium Solution for Weighted-Sum Multiobjective Optimization

[交通会议论文数据库] WU Yang ZHANG Zhiyong YUAN Jianhua MA Qing

摘要:　　As a popular approach to solve Multiobjective Optimization Problem (MOP),weighted-sum (WS) method obtains a series of weight-dependent Pareto Optimalities (i.e.multi-objective global optimums) forming Pateto Front.Each priori (preset) combination of single-objective (SO) weights stands for a certain way to compromise all of SO, e.g.a popular opinion is "Balanced weights lead to the equilibrium solution".To verify this notion, this paper proposes a method to obtain adaptive posteriori weights derived from heuristic search rather than human-judged priori weights, so as to generate an unique Equilibrium Pateto Optimality (Equi-PO) out of the Pareto Front of multiobjective-function (MOFunc), where mutual interest of every single-objective-function (SOFunc) is achieved to a certain "equal" extent.The numerical example reveal that an unique Equi-PO is obtainable with adaptive weights converging towards an unique end, and:(1) For and only for the WS-MOP whose Pareto Front is symmetric to the Equiangular Utopia Ray, "balanced weights" results in "equilibrium solution";(2) For other conditions,"balanced weights" can't.

A New Feature Evaluation Algorithm and its Application to Fault of High-Speed Railway

[交通会议论文数据库] U jing JIN Weidong CAI Zhen-zhen

摘要:　　Multi-criterion feature ranking algorithms not only alleviates the difficulty on choosing appropriate ranking criterion caused by single-ranking algorithms, but also improves the reliability of featmre ranking results.However, the issue of conflict between different single-ranking algorithms is often overlooked.By treating this task as a search and optimization process, it is possible to use the D-S theory and evidence conflict to reduce conflicts between different single-criterions and improve the stability of feature evaluation.This work presents a new multi-criterion feature ranking algorithm based on D-S theory and evidence conflict theory combining different criteria improving both classification performance and stability of feature selection results.Comparision between the new algorithm and Borda Cournt, Fuzzy Entropy, Fisher's Ratio and Representation Entropy methods are done on train fault dataset.The experimential results demonstrate most effectiveness of the new algorithm scheme than the other four criterions on all cases considered

Complex Network Traffic Signal Optimized Model and Simulation

[交通会议论文数据库] Xin i Yuenan Zhao Wei Wang Jinsong u

摘要:　　In urban road traffic system, an important issue with the expansion of the network, resulting in the

基于MATLAB的驾驶员眼睛快速定位算法的研究

[交通会议论文数据库] 谭德荣 吕长民 张洪加 于洋

摘要:　　驾驶员眼睛的精确定位，对于驾驶员眼部特征的判断有着重要意义。本文提出了一种混合肤色模型、积分投影及Prewitt边缘检测相结合的驾驶员眼睛快速定位的算法，首先根据人的肤色特征建立了混合肤色模型确定人脸位置，以MATLAB为图像处理平台，通过垂直积分投影和模板设计确定人脸区域，然后通过水平积分投影和投影曲线优化确定的眼睛范围，利用Prewitt算子对人眼区域进行边缘检测和形态学处理进行眼睛精确定位，通过仿真实验证明了该算法能够很好的实现人眼快速定位。