西南交通大学学报

Industrial Frequency Single-Phase AC Traction Power Supply System and Its Key Technologies for Urban Rail Transit

LI Qunzhan

2015, 28(2): 199-207. doi: 10.3969/j.issn.0258-2724.2015.02.001

[Abstract](1443)

Abstract:
To avoid stray current and maintain the benefit of no phase-split in the DC traction power supply system, an AC traction power supply system was proposed for the urban public transport such as metro and light rail transit. The proposed system consists of main substation (MSS) and cable traction netw...

Solution to Track Section Occupation Using Multi-sensor

HUA Zexi, CHEN Xiangdong

2015, 28(2): 208-217. doi: 10.3969/j.issn.0258-2724.2015.02.002

[Abstract](883)

Abstract:
To handle the bad shunting of track circuit, a solution using multi-sensors was proposed to solve the track section occupancy. Different layouts of three types of sensors, i.e., the infrared sensor, proximity switch and distance measurement sensor, were used in data collection. Based on D-S evidence...

Frequency-Domain and Time-Domain Characteristics of Valley V2 Controlled Boost Converter

HE Shengzhong, ZHOU Guohua, XU Jianping, WU Songrong, XU Yinglei, CHEN Li

2015, 28(2): 218-225. doi: 10.3969/j.issn.0258-2724.2015.02.003

[Abstract](1101)

Abstract:
Based on the analysis of the output voltage ripple characteristics of boost converter, the V2 control technique was applied to Boost converter. The principle of operation of valley V2 controlled Boost converter was analyzed in detail and a small-signal model was established. Based on this model, the...

Inter-tripping Protection Scheme for Feeding Sections of High-Speed Railway Based on Impedance Features

LIU Shuping, HAN Zhengqing, GAO Shibin

2015, 28(2): 226-232. doi: 10.3969/j.issn.0258-2724.2015.02.004

[Abstract](1013)

Abstract:
In order to achieve a rapid and selective protection of cross-coupling AT feeding systems for high-speed railways, an inter-tripping protection scheme for feeding system based on impedance features was proposed. According to loop voltage equations and Kirchhoff's current law, the short-circuit imped...

Applicability of Active Control Algorithms for Pantographs of High-Speed Railway

LU Xiaobing, LIU Zhigang

2015, 28(2): 233-240. doi: 10.3969/j.issn.0258-2724.2015.02.005

[Abstract](1037)

Abstract:
In order to seek the best active control algorithms for different pantographs, an efficient pantograph-catenary model was established, based on which an optimal controller, a variable structure controller, and a fuzzy controller were designed. A simulation was then conducted by applying the control ...

Improved Incomplete Derivative PID Control of Axial Active Magnetic Bearing

JIANG Qilong, HU Zhenqiu

2015, 28(2): 241-246. doi: 10.3969/j.issn.0258-2724.2015.02.006

[Abstract](940)

Abstract:
In order to reduce the interference of measurement noise and improve the steady-state precision of magnetic bearing control, the active magnetic bearing of a vertical motor was adopted to analyze the influence of measurement noise on the traditional PID control. Considering that the incomplete deriv...

Matching between Free Angle of Round-Pin Coupler and Carbody Structure Parameters

QU Tianwei, XU Ziqiang, MA Weihua

2015, 28(2): 247-255. doi: 10.3969/j.issn.0258-2724.2015.02.007

[Abstract](912)

Abstract:
To explicate the matching relation between main structure parameters of carbody and round-pin coupler, theoretical analysis and dynamic simulation method were used to analyze the relation between main structure parameters of carbody and rotation angle of the coupler in the cases of curve passing and...

Railway Fastener Detection Algorithm Integrating PHOG and MSLBP Features

LIU Jiajia, LI Bailin, LUO Jianqiao

2015, 28(2): 256-263. doi: 10.3969/j.issn.0258-2724.2015.02.008

[Abstract](962)

Abstract:
In order to improve the recognition rate and robustness of railway fasteners detection, and to increase the effectiveness of PHOG (pyramid histogram of oriented gradients) feature, a simple and effective sleeper shoulder locating algorithm was proposed. In this algorithm, the redundant information i...

1 Bit Compressed Sensing Reconstruction Algorithm Based on Blind Operation

YAN Bin, CHEN Hao, WANG Wendong, ZHOU Xiaojia

2015, 28(2): 264-269. doi: 10.3969/j.issn.0258-2724.2015.02.009

[Abstract](941)

Abstract:
To solve the problem that the matching sign pursuit (MSP) algorithm can not adaptively reconstruct signals when the sparsity is unknown, we proposed a forward-backward matching sign pursuit (FBMSP) algorithm. Based on successive approximation theory, by gradually expanding the support set to expand ...

A Novel Clutch Actuator Control Algorithm Based on Lipschitz Observer

WU Haikang, ZHONG Zaimin, YU Zhuoping

2015, 28(2): 270-278. doi: 10.3969/j.issn.0258-2724.2015.02.010

[Abstract](882)

Abstract:
For parallel hybrid vehicles, a nonlinear observer based novel position servo control algorithm was designed without the need of speed sensors. This algorithm, according to the feedback of system states, can implement high-quality servo control of friction torque through the position control of rele...

Helix Error Testing and Tracing on Planar Enveloping Hourglass Worm Tooth Surface

LUO Wenjun, CHEN Yonghong, ZHANG Guanghui

2015, 28(2): 279-285. doi: 10.3969/j.issn.0258-2724.2015.02.011

[Abstract](811)

Abstract:
In order to improve the manufacture precision of planar enveloping hourglass worm tooth surface, a method for the helix error testing, tracing, and correction was proposed. Based on the theory of differential geometry and gear meshing, mathematical models for the tooth surface, the hourglass helix, ...

Hazard Mechanism Analysis of Taoguan Giant Debris Flow in Wenchuan Earthquake Area on July 10th, 2013

HU Xiewen, HAN Mei, LIANG Jingxuan, PAN Cong, FANG Li, WU Jianli

2015, 28(2): 286-293. doi: 10.3969/j.issn.0258-2724.2015.02.012

[Abstract](955)

Abstract:
For the giant debris flow caused by heavy rainfall in Taoguan gully, in Wenchuan earthquake area on July 10th, 2013. Field investigation and experiments were made to analyze the loose materials, rainfall, and terrain conditions of the Taoguan gully, and study the process of startup flow and depositi...

Fatigue Life Estimation of Corroded Bridge Wires Based on Theory of Critical Distances

YE Huawen, HUANG Yun, WANG Yiqiang, QIANG Shizhong

2015, 28(2): 294-299. doi: 10.3969/j.issn.0258-2724.2015.02.013

[Abstract](858)

Abstract:
Based on the theory of critical distances, critical distance to influence fatigue damage zone determining was solved in light of the notch stress gradient of corroded wires so as to estimate the fatigue performance of bridge wires in service. FEM (finite element method) was used to propose a fatigue...

Optimal Design of Concrete Tied Arch Bridge

QIAO Jiandong, WU Huishan, YANG Wei

2015, 28(2): 300-305. doi: 10.3969/j.issn.0258-2724.2015.02.014

[Abstract](991)

Abstract:
In order to investigate the multi-parameter optimal design method of concrete tied arch bridges, an optimal model was established. In this model, rise, cross section dimensions of arch ribs and tied beams, area of each suspender and number of pre-stressed steel bars in each hole are selected as the ...

Fluid-Solid Interaction-Based Mechanical Characteristics of Underwater Shield Tunnel

QI Chun, HE Chuan, FENG Kun

2015, 28(2): 306-311,330. doi: 10.3969/j.issn.0258-2724.2015.02.015

[Abstract](942)

Abstract:
In order to investigate the mechanical characteristics of a underwater shield tunnel under fluid-solid interaction during construction stage, a numerical simulation model was established to calculate water pressure on segment lining by taking Shiziyang shield tunnel as an example. Field tests were c...

Model Test on Bearing Capacity Characteristics of Steel Tubular Composite Piles

ZHANG Min, MA Jianlin, SU Quanke, WU Weisheng

2015, 28(2): 312-318. doi: 10.3969/j.issn.0258-2724.2015.02.016

[Abstract](890)

Abstract:
In order to investigate the bearing capacity of steel tubular composite (STC) piles, two groups of piles, including a group of STC piles with shear ring, drilling mud skin and anticorrosion coating and a group of reinforced concrete piles, were used to conduct comparative model tests. The load-defor...

Decoupling of Evolutionary Power Spectral Density and Its Engineering Applications

PENG Liuliu, HUANG Guoqing, MA Cunming, SU Yanwen

2015, 28(2): 319-324,330. doi: 10.3969/j.issn.0258-2724.2015.02.017

[Abstract](951)

Abstract:
In order to improve the simulation efficiency of nonstationary processes and simplify the structural response analysis under nonstationary excitations, evolutionary power spectral density (EPSD) was approximately decoupled into the linear summation of products of the squared modulus of Fourier trans...

Weights of Slope Stability Evaluation Indexes Based on Factor Analysis Method

ZHAO Jianjun, HE Yuhang, HUANG Runqiu, JU Nengpan

2015, 28(2): 325-330. doi: 10.3969/j.issn.0258-2724.2015.02.018

[Abstract](988)

Abstract:
For rapid evaluation of slope stability, 44 typical slopes along Tangtun highway were investigated. The factor analysis method was adopted to analyze 7 evaluation indicators of slope stability, i.e., slope gradient, slope height, lithology, slope structure, structural plane cementation, main discont...

Comparative Research of Probabilistic Stability Analysis Methods of Embankment Based on Limit Equilibrium Method

JIANG Xin, ZHU Qijiong, CHEN Tao, GAO Xiaofeng, QIU Yanjun

2015, 28(2): 331-335,341. doi: 10.3969/j.issn.0258-2724.2015.02.019

[Abstract](958)

Abstract:
In order to reasonably select probabilistic slope stability analysis methods, a comparison research on the global minimum method and the overall slope method was carried out based on vertical slice limit equilibrium method software SLIDE and geotechnical centrifuge model test of embankment on sloped...

Hyperspectral Image Classification Based on Structured Dictionary Learning

QIN Zhentao, YANG Wunian, YANG Ru, PAN Peifen, DENG Cong

2015, 28(2): 336-341. doi: 10.3969/j.issn.0258-2724.2015.02.020

[Abstract](908)

Abstract:
In order to improve the classification accuracy of hyperspectral images, a new structured dictionary-based method for hyperspectral image classification was proposed. This method incorporates both spatial and spectral characteristics of hyperspectral images to obtain a dictionary of each pixel, the ...

Effect of Dosage of Fly Ash and Blast Furnace Slag on Performance of Concrete Prepared with Poorly Graded Sand

LI Maohong, ZHANG Yujie, CHEN Hang, ZHAO Jumei

2015, 28(2): 342-346,353. doi: 10.3969/j.issn.0258-2724.2015.02.021

[Abstract](993)

Abstract:
In order to fabricate high quality concrete using poorly graded sand, six groups of concrete with poor sand gradation were prepared with different dosages of fly ash (FA) and blast furnace slag (BFS). The sand and stone compactness of the concrete was evaluated using the Andreasen equation, and the ...

Flow Field Characteristics of Exhaust Flow Assisted with a Jet

YANG Yang, WANG Yi, LI Yanbin

2015, 28(2): 347-353. doi: 10.3969/j.issn.0258-2724.2015.02.022

[Abstract](853)

Abstract:
To decrease the jet flow rate in contaminants control for a purpose of energy conservation, the flow field characteristics of exhaust flow assisted with a jet was focused. When the angle between the jet and the exhaust flow ranges from 90to 60 , utilizing the numerical simulation, the conditions to ...

Stair-Like Control Strategies of Variable Speed Limit for Bottleneck Regions on Freeway

YANG Qingfang, MA Minghui, LIANG Shidong, LI Zhilin

2015, 28(2): 354-360. doi: 10.3969/j.issn.0258-2724.2015.02.023

[Abstract](941)

Abstract:
The traffic flow operation at bottleneck sections on freeway mainlines is usually deteriorated by heavy traffic load, resulting in an increase in travel time and a decrease in traffic efficiency. By analyzing the space-time characteristics of the traffic flow at bottleneck sections on freeway mainli...

Link Travel Time Estimation for Urban Roads Using Low Frequency GPS Data and Intersection Delay

WANG Zhijian, MA Chaofeng, LI Liang

2015, 28(2): 361-367. doi: 10.3969/j.issn.0258-2724.2015.02.024

[Abstract](987)

Abstract:
In order to solve the problem of large error in link travel time estimation with low-frequency GPS data, vehicle delay features in road intersection-affected areas were analyzed. According to whether two adjacent GPS points stride over multiple intersection-affected areas and whether there are GPS p...

Modeling and Simulation Analysis of Microscopic Traffic Flow in Multi-airport Terminal Airspace

ZHANG Honghai, HU Yong, YANG Lei, XU Yan

2015, 28(2): 368-374. doi: 10.3969/j.issn.0258-2724.2015.02.025

[Abstract](928)

Abstract:
In order to study the microscopic spatial and temporal characteristics and evolution law of air traffic flow in multi-airport terminal airspace, considering the operation characteristic of single, converging, and crossed traffic flow flying to the target point, a local sorting model, a aircraft-foll...

Robust Optimization Model for Integrated Aircraft Scheduling Based on Delay Propagation

ZHU Xinghui, WU Weiwei, QI Yanlong

2015, 28(2): 375-381. doi: 10.3969/j.issn.0258-2724.2015.02.026

[Abstract](988)

Abstract:
In order to alleviate the impact of flight delays on the flight operation, a double objective network flow robust optimization model for integrated aircraft scheduling was presented based on analysis of the delay propagation characteristics and its distribution. The first objective was to minimize t...

Phase Field Modeling on Effects of Static Magnetic Field on Oscillatory Deformation of Molten Droplet

SHI Wanyuan, ZHANG Fengchao, TIAN Xiaohong, SHEN Jun

2015, 28(2): 382-387. doi: 10.3969/j.issn.0258-2724.2015.02.027

[Abstract](727)

Abstract:
In order to study the characteristics of oscillatory process of a molten silicon droplet under static magnetic field, the phase field method was adopted to numerically simulate the interface oscillation and internal fluid convection of a molten silicon droplet. The influence of an axial static magne...

Nonlinear Flutter of a Two-Dimensional Viscoelastic Plate with Motion Constraints in Subsonic Flow

TANG Huaiping, LI Peng, YANG Yiren

2015, 28(2): 388-392. doi: 10.3969/j.issn.0258-2724.2015.02.028

[Abstract](846)

Abstract:
In order to study the stability and nonlinear flutter of a cantilevered viscoelastic plate with nonlinear motion constraints in subsonic flow, the motion equation of the cantilevered plate is established by Hamilton theory. The equation is then transformed to a series of ordinary differential equati...

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2015 Vol. 28, No. 2