最新刊期
      期 2 ， 2010
      • Issue 2, Pages: 1-4(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.017
        摘要：This paper derived the calculating formula of the common-mode voltage of three-phase four-leg inverter by analyzing the working principle and working mode of three-phase inverter with four bridge legs. Then the improved SVPWM modulation technology was proposed. The new modulation technology had been modeled and simulated by using Matlab/Simulink. The simulation result shows that the new SVPWM modulation technology applied in three-phase inverter with four bridge legs can restrain common mode interference effectively without changing DC voltage utilization and harmonic content of output current.  
        关键词：three-phase inverter with four bridge legs;common mode interference;vector control;SVPWM   
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        发布时间：2021-12-13
      • Issue 2, Pages: 5-8(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.020
        摘要：This paper presented the communication gateway between CRH2 EMUs domestic BCU and train message terminator. Provided a hardware realization solution of BCU communication network and gave a solution to the main program and its subprogram. The communication between BCU and train message terminator has been realized. The function of BCU gateway is verified in the way of connecting the CRH2 EMUs BCU test bench and domestic BCU.  
        关键词：CRH2 EMUs;BCU communication gateway;HDLC;RS485;ARM   
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      • Issue 2, Pages: 9-11(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.001
        摘要：The wheel plate shape of 35 t axle load locomotive had been optimized. The maximum equivalent stress of optimized plate is less than the old one when the locomotive passing through a turnout and curve and the mass of optimized wheel was also reduced. The main features of wheel plate on heavy axial load locomotive had been proposed, which is a good reference for design the same type of wheel plate.  
        关键词：35t axle load;locomotive;plate;optimization;strength   
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        发布时间：2021-12-13
      • Issue 2, Pages: 12-14(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.002
        摘要：Based on the circular tube free rollover, a new type of energy-absorbing device was proposed. The inversion processes of the proposed tubes under axial compression had been simulated by using explicit finite element method and the energy absorption characteristics during the processes had also been investigated. The new proposed energy-absorbing device significantly had a higher energy-absorbing performance when compared with traditional circular tubes. Without the requirement of clamps, this device can hold a long effective crush distance and take an excellent energy-absorbing performance, which overcomes the drawbacks of traditional tubes.  
        关键词：energy-absorbing device;crashworthiness;explicit finite element;ATP   
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        发布时间：2021-12-13
      • Issue 2, Pages: 15-17(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.003
        摘要：This paper introduced the working principle, making-up and function of electronic fuel injection system of NJ2 locomotive and list the fuel consumption, emission targets measured on Qinghai-Tibet plateau. Combustion process of NJ2 locomotive had been optimized and the fuel consumption rate is lower, which has been proved from the fuel consumption compare of NJ2 locomotive and DF4B locomotive.  
        关键词：NJ2 locomotive;electronic fuel injection;fuel consumption;emission targets   
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        发布时间：2021-12-13
      • Issue 2, Pages: 18-21(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.004
        摘要：This paper studied the suspension force calculation method and established the mathematical model of permanent magnet hybrid electromagnetic suspension system. The effects of permanent magnet on the model parameters and control system had also been analyzed from suspension force, electric characteristics and control quality separately. The results which can guide the design and parameter selection of cascade controller. The stable control of single magnetic hybrid suspension system has been achieved.  
        关键词：electromagnetic;permanent magnet;hybrid suspension system;control characteristic;suspension force;electric characteristic   
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        发布时间：2021-12-13
      • Issue 2, Pages: 22-25(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.005
        摘要：According to catenary construction, at unreduced precision, a multivariable simulation model of catenary stochastic pulsation wind field based on the harmonic synthesis was proposed, which properly simplifies wind speed coherence function and power spectral density function. The simulation model adopted the Davenport power spectral density unchanging along the height and considered the correlations between three turbulent wind components at different points and introduced the discrepancy at different phase angles to represent the time delay in wind velocity passage. The FFT technique (fast Fourier transform technique) is used to enhance the harmonic synthesis efficiency. A numerical example of simulation for stochastic wind field of the hundred-mile wind field at Lanchow-Sinkiang railway is included in this paper to illustrate the improved method introduced. It is demonstrated that the cross-power spectral density function and cross-correlation function are in good agreement with the expected targets. It means that the proposed method can simulate the target stochastic pulsing wind velocity field accurately and effectively.  
        关键词：contact line;stochastic wind field;FFT technique;time domain analysis   
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        发布时间：2021-12-13
      • Issue 2, Pages: 26-27(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.006
        摘要：The improvement of adhesion characteristics was important in electric locomotive to promote the traction performance, reduce slip/skid phenomena and to increase the ride comfort. Based on the mechanical equations of electric motor and locomotive, this paper proposed a new adhesion control method based on differential acceleration. The effectiveness of the proposed method has been confirmed by the numerical simulation.  
        关键词：locomotive;adhesion control;differential acceleration;motor;simulation   
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        发布时间：2021-12-13
      • Issue 2, Pages: 28-32(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.018
        摘要：Beginning with the introduction of the single-phase voltage-source pulse rectifier operation principle, this paper analyzed the second harmonic current. The design method of the second resonance circuit was presented and the influence when the filter circuit’s parameters had offset was analyzed in detail too. At last the analysis conclusion is conformed by the computer simulation and the circuit test.  
        关键词：voltage-source;pulse rectifier;the second harmonic current;the second resonance   
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        发布时间：2021-12-13
      • Issue 2, Pages: 33-35(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.022
        摘要：This paper introduced the software of TPX20 display unit system which using linux operation system. It described the construction and kernel of the software system, discussed the device drivers and file system, as well as the optimization work focus on features of locomotive industry. The system runs in good condition and has an excellent performance.  
        关键词：LINUX;device driver;kernel;file system;locomotive display platform;TPX20 display;PXA255 embedded processor   
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        发布时间：2021-12-13
      • Issue 2, Pages: 36-38(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.021
        摘要：This paper introduced the project development of localization LED information display, which was part for 200 km/h, 300 km/h EMUs. Emphasis had been put on the scheme design for TPX31 passenger information display. The problems happed during production process and its solutions had also been analyzed. This paper puts forward some innovative design concept, summaries some experiences and prospect the application of LED information display in other fields.  
        关键词：EMUs;information display;LED;localization;high speed train   
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        发布时间：2021-12-13
      • Issue 2, Pages: 39-42(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.023
        摘要：The background of domestical pcsam software was introduced briefly. According to the many insufficiencies of French CSEE’s pcsam software, a new thought named MDA Parsing was proposed. MDA Parsing processed the structures and the definitions of sam binary file nimbly by xml MDA; using the factory method to fulfill the OCP in software construction; designing the new functions based bit to get value from binary data; adopting many kinds of computer technology for example binary file stored datum, I/O times, multi-data streams as well as multithreading to enhance the speed of paring file. The sam binary file is fast correctly parsed by MDA Parsing, and the method is given based on the VC6.0 .  
        关键词：MDA;factory method;OCP;binary file;I/O   
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      • Issue 2, Pages: 47-49(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.024
        摘要：This paper introduced the software and hardware structure, function characteristics of locomotive video monitoring system. The development of the system was based on DVR technology and the needs of railway safety management, which could snap and record all kinds of items point according to the needs of railway safety management. The system could provide monitor screen and alarm information, which could instead of the driver inspection. The system will pay a significant role in accident prevention, accident analysis and supervision of crew operations.  
        关键词：locomotive monitoring system;video monitoring;items point record;real-time communication;file download;data analysis;wireless network communication   
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      • Issue 2, Pages: 50-53(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.008
        摘要：This paper introduced the software and hardware component and working theory of fault diagnosis device of locomotive running gear of embedded systems based on ARM+LINUX. This system had strong data processing ability, high stability and abundant interface with peripheral equipments. Its powerful data-processing ability is extremely fit for the real-time processing of failure diagnoses system.  
        关键词：ARM;LINUX;embed system;condition monitoring;fault- diagnosis;locomotive running gear   
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        发布时间：2021-12-13
      • Issue 2, Pages: 54-57(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.009
        摘要：The analysis, collate and summarize the test methods of motor electric insulation had been done in this paper. In order to deepen the understanding of detection methods for insulation, several insulation-testing purposes and some of the problems encountered had been analyzed with practice, which is conducive to accurately use relevant detection methods to analysis and determine the status of the motor insulation.  
        关键词：motor inspection;insulation resistance;polarization index;absorptance;dielectric loss test;DC discharge   
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      • Issue 2, Pages: 58-61(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.011
        摘要：This paper was focused on the faults of main converter with the Simulink toolbox of Matlab, the output voltages of different faults had been obtained. Making use of wavelet analysis to process the output voltage, the fault feature had been extracted and the feature vector had been constructed. The samples had been accessed, which was containing the fault information with the SVM toolbox, the multi-fault classifiers had been established and the samples had been diagnosed. However, in the infinite space, SVM easily lead to wrong classification. For this problem, an improved method had been proposed, which cought make SVM to classify in a limited space. Finally, the simulation samples had been trained and tested. Experimental results show that the classification result is fine and achieves the desired objective.  
        关键词：main converter;fault-diagnosis;wavelet analysis;support vector machine;Simulink toolbox   
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        发布时间：2021-12-13
      • Issue 2, Pages: 66-69(2010) DOI: 10.13890/j.issn.1000-128x.2010.02.013
        摘要：According to GB/T21413.1 and GB/T 21413.2 and the relevant national standards, this paper introduced the universal problems existing in drafting standards for rolling stock electric products during the past two years, the selection of rating value, and nominal ralue, working performance and mechanical life or electric life, test sequence and related verify, constant humid-heat and alternating humidheat, high-temperature test, the purpose of which is to implement national standards and improve the product drafting standard levels.  
        关键词：rating value;nominal ralue;working performance;constant humid-hot;alternating humid-hot;radiation products;nonradiation products;rolling stock electric equipment   
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