最新刊期
期 2 ， 2019
- 摘要：Referring to the particular features of mine transportation operation, which was being scheduled, organized and closed, put forward the operation organization model and external interface of autonomous mine haulage system, and the key points in the system design was sorted out. On this basis, the system architecture of autonomous open-pit mine haulage system was proposed as being composed of ground management and monitoring subsystem, vehicle mounted automatic driving subsystem and data communication subsystem, and the function requirements for each subsystem under the architecture were allocated. The operation scenarios of the autonomous mining haulage system were illuminated. The extension of the basic ideas and system architecture of the autonomous open-pit mine haulage system to the similar application field was also prospected.关键词：mine transportation;driverless haulage;operation organization model;system architecture;function allocation;operation scenario
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- 20
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发布时间：2021-12-13 - 摘要：This paper introduced the characteristics, advantages and disadvantages of foreign cog railways and the rack vehicles, the development history and classification of gear-rail railway systems, analyzed the characteristics and applicable conditions of different rack systems, and summarized the current application status of foreign cog railways and rack vehicles and the application situation of typical representative rack-rail lines and rack vehicles. Based on the analysis of the latest technology adopted by the rack vehicles abroad in recent years, the future development trend of the technology was put forward.关键词：cog railway;rack vehicle;development trend
- 644
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- 8
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发布时间：2021-12-13 - 摘要：This paper researched on coupler suspension failure of high-speed and heavy-duty freight locomotive. The cause of the failure was researched systematically. The deviation of coupler height was the key point that caused the bumper floating. The data relationship between bumper float and coupler suspension was calculated under different mating clearance of coupler and tail frame. The optimal solution was proposed to solve the coupler suspension.关键词：high-speed and heavy-duty;freight locomotive;coupler suspension;bumper floating;heavy haul railway
- 707
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- 3
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发布时间：2021-12-13 - 摘要：Based on the static analysis, dynamic model of C80 heavy haul train was built to investigate the influence of partial load on running safety of heavy haul train. Under the different partial load condition, the derailment coefficient and the wheel load reduction rate were calculated when the train passed the curve. The analysis results show that with the increase of partial load, the running safety of the train is getting worse. Longitudinal partial load has main effect on the derailment coefficient of wheel, and lateral partial load has main effect on the rate of wheel load reduction. With the increase of lateral partial load, the rate of wheel load reduction increases obviously, so the lateral partial load should be strictly controlled.关键词：heavy haul train;partial load;derailment coefficient;rate of wheel load reduction;vehicle dynamics;simulation
- 668
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- 3
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发布时间：2021-12-13 - 摘要：The auxiliary converter of the 350 km/h CEMUs adopts wireless parallel technology, which improves the power supply redundancy. The auxiliary converter was controlled with PQ droop control. The phase-locking of supply bus voltage was realized with three-phase synchronous coordinate transformation mode, grid-connected flow control was realized by means of active power controlling frequency of auxiliary converter and reactive power controlling output voltage amplitude of auxiliary converter. A real-vehicle test had been conducted. The test results show that the 350 km/h CEMUs auxiliary converter has a good grid-connected control effect with fast dynamic response and nice current sharing effect in the process of starting, switching, and load fluctuation, which meets the requirements of the EMUS operation.关键词：CEMUs;auxiliary converter;parallel control;droop characteristic;phase-locking technique
- 755
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- 2
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发布时间：2021-12-13 - 摘要：In view of the problems of the modular multi-level structure of the new railway power regulator (MMC-RPC), such as the serious influence of internal circulating current on the performance and efficiency of traction power supply system under the non-ideal operating conditions of voltage disturbance, and even the failure of some power equipment in the power supply system, a new SOGI-FLL frequency-locked loop controller was proposed to cooperate with circulating current on the AC side of the MMC, the PIR controller was used in the suppression side to track and control the internal circulation of MMC-RPC accurately and improve the operation performance of MMC-RPC. When the voltage input signal was disturbed, the new SOGI-FLL could significantly reduce the overshoot of the output angular frequency and improve its response speed compared with the traditional PLL. It effectively solved the problems of inaccurate tracking of harmonic circulating current and poor harmonic circulating current control effect caused by excessive frequency offset of the system when PIR circulating current suppressor was used to control the circulating current. Finally, the MMC-RPC circulation suppression simulation model was built on the MATLAB simulation platform. The simulation results confirmed the superiority and effectiveness of using SOGI-FLL controller and PIR circulation suppressor to track and suppress the MMC-RPC circulation accurately.关键词：modular multilevel;circulating-current suppression;power regulator;proportional integral resonant controller;Second-order generalized integrator;frequency-locked loop;high-speed railway;simulation
- 1562
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- 3
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发布时间：2021-12-13 - 摘要：The characteristic and application of DC-link voltage hold mode for EMUs converter were introduced, and the DC-link voltage hold control strategy based on vector control was proposed. The influence of feed-forward compensation in control strategy was analyzed theoretically, and the calculation method of feed-forward power was provided. Finally, the validity of the control strategy was verified by the experiment results.关键词：EMUs;converter;DC-link voltage;regenerative braking;passing neutral section;unpowered return;high-speed train
- 922
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- 3
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发布时间：2021-12-13 - 摘要：By using computational multi-body dynamics simulation software SIMPACK, a dynamics simulation model of high-speed EMUs running in China was built. The actual measurement wheel tread which had serviced 50 000 km, 100 000 km, 150 000 km and 200 000 km effect on dynamic was analyzed. The analysis results showed that the critical velocity of the vehicle system increased with the increase of the service range, and then decreased with the increase of the service range, then increased with the increase of the service range and leveling off finally. With the increase of the wheel tread service mileage vertical stability index had not changed steadily, and the horizontal stability had been increased with the increase of the service mileage besides serving 100 000 kilometers. Derailment coefficient, lateral wheelset force and abrasion power larger changed with the increase of the wheel tread service range, and the weight loss rate changed a little with the increase of the wheel tread service range.关键词：EMUs;wheel tread;dynamics;service range;simulation
- 457
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- 2
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发布时间：2021-12-13 - 摘要：In order to study the influence of the polygon wheel of meter-gauge locomotive on the dynamic performance of the vehicle system, a dynamic model of meter-gauge locomotive was established. The influence of harmonic order and the amplitude of the wave depth of the polygon wheel on the dynamic performance were calculated. The wave depth limit of the locomotive was studied at different harmonic order. At last, the change trend of wheel-rail vertical forces was studied under the joint action of polygon wheel and track excitation. The results showed that due to the low running speed of the meter-gauge locomotive, the polygon wheel will form low frequency vibration which will increase the vibration response of the car body; the polygon wheel will greatly increase the wheel-rail vertical forces, but it has little effect on the derailment coefficient; the wave depth limit is inversely proportional to the running speed of the locomotive and the harmonic order; the track excitation will not cover the trend caused by polygon wheel, but it will greatly increase the wheel-rail vertical forces. Therefore, it’s necessary to detect the wheel out of roundness frequently when the locomotive is running on rail, and lathing or replacing wheel in time in order to prevent the wheel-rail vertical forces is too large or the jumping of wheels.关键词：polygon wheel;meter-gauge locomotive;dynamic performance;harmonic order;wave depth
- 457
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- 3
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发布时间：2021-12-13 - 摘要：In order to make traction control unit (TCU) meet the requirements of high weather resistance temperature, that is, TCU should be stored in the environment of -50~70℃ for a long time and can be turned on at -40℃, the influence of temperature on the performance of TCU should be fully consider. By setting the condition of temperature screening of components on TCU board, calculating the influence of resistance value change on system parameters under limit condition, and inquiring the characteristic curve of capacitance of ceramic capacitors of different materials changing with temperature and voltage, the selection of resistors, capacitors and other components was determined; by using FloTHERM software to simulate the influence of wind speed on CPU board heat dissipation, the TCU fan type selection was determined. In order to verify the correctness of the design, the final TCU was verified according to the test method prescribed by the national standard. The test results showed that the TCU met the requirements of high weather resistance temperature.关键词：temperature;traction control unit;high weather resistance;component screening;thermal simulation;EMU
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- 2
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发布时间：2021-12-13 - 摘要：In view of the high-power IGBT short-circuit protection technology, the IGBT short-circuit reason and protective principle was introduced. The short circuit time of IGBT was verified to be closely related to its working voltage by short circuit test waveforms under different working voltages. The inverse relationship between IGBT short circuit time and IGBT working voltage was obtained. It was proved by data fitting curve of short-circuit test that the short-circuit energy of IGBT was the same under different working voltages.关键词：short-circuit protection;IGBT desaturation;driver;short-circuit time;IGBT short-circuit energy;high-speed EMUs
- 469
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- 9
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发布时间：2021-12-13 - 摘要：As the main mechanical transmission component of train, the existence of dynamic unbalance of cardan shaft aggravates the vibration of transmission system and easily destroys the core components of transmission system such as bearings and cardan joints. This paper studied the time domain early warning method of dynamic unbalance of cardan shaft by monitoring the abnormal vibration of gearbox, explored the time domain early warning parameters according to the long-term track test, established the time domain early warning model of vibration of cardan shaft-gear box end;established the finite element model of transmission system by using finite element method, and studied the vibration response relationship of cardan shaft with different dynamic unbalance values at different rotational speeds at the gear box end. The results show that the maximum acceleration response of the standard old axle is about 2.8 times of that of the standard new axle at different rotational speeds. The analysis of simulation and measured data shows that the effective value of time-domain early warning of vibration acceleration is 3.72g when the train speed is 200 km/h, and 4.97g when the train speed is 250 km/h. The rightness of simulation results and warning threshold is verified by bench test.关键词：train cardan shaft;dynamic imbalance;EMUs;gearbox;time domain early warning;simulation analysis;bench test;FEA
- 1294
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- 2
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发布时间：2021-12-13 - 摘要：In order to realize the distributed, modular and intelligent design concept of the braking system of the next generation electric locomotive, the brake display screen based on CAN bus communication was developed. The software design of the brake display was based on the embedded Linux operating system, which adopted Qt Creator, a cross-platform integrated development environment, using design methods such as Qt designer, signal and slot mechanism, SQLite database and multithreading technology. The self-developed brake display realized the function of configuring, monitoring and maintaining the braking system with friendly and simple interfaces. For the cross-platform porting characteristics of Qt program, the completion of this design is of reference for the development of display software on other platforms.关键词：embedded Linux operating system;Qt designer;multithread;signal and slot mechanism;CAN bus;SQLite database;daemon
- 483
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- 8
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发布时间：2021-12-13 - 摘要：Rail wear, rolling contact fatigue and other diseases will reduce the rail life, increase maintenance costs and even threaten vehicle safety. In order to explore the impact of rail profile optimization on vehicle dynamic performance, 3 kinds of vehicle dynamics models for locomotive, passenger car and freight car were established, and optimized a section of the domestic small radius curve rail profile, compared the wheel-rail relationship by minimum distance search method and calculated the dynamic curve passing performance of the vehicle by dynamic simulation software Simpack. The results showed that: the contact range on high rail of the curve was reduced from 47 mm to 28 mm after rail profile optimization, the contact probability at track distance was significantly lower than before, and rail side grinding was obviously decreased; the wheel-rail contact points on the low rail were concentrated on the top of track after optimization which could avoid full light strip phenomenon; rail profile optimization could decrease the wheel rail lateral force by 3.3%-21.1%, and decrease lateral wheelset force by 6.9%-21.9%, but the effect of wheel rail vertical force was not obvious; rail profile optimization could reduce the rate of wheel load reduction, derailment coefficient and wear power, improve vehicle running safety.关键词：small radius curve;rail profile optimization;wheel rail relationship;vehicle dynamic
- 571
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- 2
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发布时间：2021-12-13 - 摘要：Taking HXD3G locomotive as an example, the composition and characteristics of locomotive network system were introduced. The locomotive adopted SHDSL communication technology, and the network data was transmitted through the Ethernet expander (DSL) and common double-core shielded cable. The function of 15 Mbit/s inline communication at 650 meters (18 vehicles)distance was realized. The feasibility of carrier communication technology to realize long-distance and high-speed transmission through DSL was verified. By testing and analyzing the stability of data transmission of locomotive under various control modes such as traction and braking, the optimal configuration scheme of parameters of each component of the system was determined to meet the control requirements of different operation conditions under the vehicle push-pull marshalling mode.关键词：HXD3G locomotive;SHDSL;push-pull marshalling mode;network system
- 694
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- 3
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发布时间：2021-12-13 - 摘要：Four-quadrant over-current fault is one of the main faults of the HXD1 locomotive traction converter. Due to the class distribution of fault cause is unbalanced and there are a lot of over-current fault causes, four-quadromt over-current fault is difficult to distinguish and diagnose. A fault diagnosis method based on recursive 2-Classification was proposed. Based on K-Means and wavelet packet decomposition, feature extraction of data-related key fields was carried out. Reliable classification model was constructed by gradient boosting decision tree (GBDT) based on ensemble learning, and multi-label data was classified and diagnosed recursively by recursive 2-classification. Experiments on four-quadrant input over-current fault data files showed that this method could improve the classification and diagnosis of fault samples.关键词：recursive 2-classification;electric locomotive;four-quadrant input over-current;wavelet packet decomposition;gradient boosting decision tree;machine learning;fault diagnosis
- 501
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- 3
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发布时间：2021-12-13 - 摘要：The actual load rate of railway traction transformer is mostly below 0.3, far below the normal load rate standard of 0.5 and above, which is called low load operation condition. By analyzing the overload capacity of four typical traction load curves under normal load rate and low load rate, it was proved that traction transformers had higher overload capacity under low load rate operation, but for different load curves, their overload capacity varies greatly. Curve 1 and curve 3 could be increased to 1.25 to 1.56 times of normal overload capacity, while curve 2 and curve 4 could not obviously improved, which provides a reference basis for reasonable selection of installed capacity of traction transformers.关键词：traction transformer;load rate;overload capacity;temperature limit;life loss
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- 2
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发布时间：2021-12-13 - 摘要：In order to improve the environment of grinding working for metro lines and realize the utilization of catenary and internal combustion hybrid power, a hybrid metro rail grinding wagon was developed. The basic composition, functions and principles of each subsystem of the grinding wagon were introduced in detail. The problem of exhaust gas discharging and noise pollution could be effectively solved by grinding working with the catenary power in tunnel. The application practice of Changsha metro showed that the catenary power grinding equipment has the advantages of zero emission and low noise.关键词：rail grinding wagon;hybrid power;power switching;subway;urban rail transit
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- 4
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发布时间：2021-12-13 - 摘要：Based on the research of WTB bus protocol network data transmission characteristics, a PMTS scheduling strategy for coordinated control of periodic data and aperiodic data transmission was proposed. Using the scheduling theory and control strategy of real-time control systems, a periodic data scheduling and polling mechanism was constructed in real time, and a non-periodic data dynamic preemption scheduling control method is designed so as to achieve coordinated control and scheduling of network data transmission. The WTB bus protocol network data transmission experimental platform was set up, and the PMTS scheduling strategy was applied to the independently designed train communication gateway system. The result shows that the scheduling strategy could flexibly allocate the normal operation cycle of the WTB bus network grouping, and the cooperation between the underlying data transmission and the upper protocol was realized.关键词：WTB bus protocol;PMTS;network marshalling;scheduling control;data transmission
- 646
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- 2
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发布时间：2021-12-13 - 摘要：The background of the application of the CRRC TIM1000NSM33 IGBT on the traction system of Wuxi metro line 2 was expounded. The feasibility and reliability of the device substitution were compared and analyzed from the aspects of IGBT technology route and traction system selection design. The results show that, for having adopted the upgraded technology route, the performance, index and reliability of the independent IGBT are higher than the original imported brands and meet the substitution requirements. In addition, the application problems of domestic IGBT devices in vehicle loading assessment were analyzed in detail, and effective measures were put forward to make the domestic IGBT successfully applied to Wuxi metro, and extended to other projects and fields.关键词：IGBT;traction system;urban rail transit;thermal design;passive turn-on
- 535
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- 4
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发布时间：2021-12-13 - 摘要：According to the service life of bogie frame of a project can not meet the operation requirements, by comparing and analyzing the time-domain and frequency-domain diagrams of line dynamic stress test data, the optimal structure scheme was put forward. The optimized structure scheme was verified by theoretical calculation, finite element analysis and actual operation line test. The stress of the key parts of the optimized structure was greatly reduced, and the equivalent stress of all measuring points was less than the standard limit of 70 MPa, which met the requirements of normal service life of vehicles.关键词：metro;bogie frame;dynamic stress test;dynamic performance;structural optimization;finite element analysis;urban rail transit;simulation
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- 5
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发布时间：2021-12-13 - 摘要：Starting from the failure of imported rubber elastic components used in a linear motor bogie, the domestic development of the rubber elastic components was carried out. The advantages and disadvantages of different structures of the primary rubber traction joints were studied and discussed. The fatigue characteristics of natural rubber and chloroprene rubber at 70 ℃ high temperature were analyzed and compared. The stress and strain of rubber under working load were simulated and calculated by finite element analysis software. A traction joint with close structure was presented. Compared with the laminated structure, the rubber strain of the structure was reduced by more than 15% by finite element analysis. At the same time, the fatigue tests of two structures at room temperature and high temperature were carried out. The results showed that the fatigue performance of the optimized products has been improved by more than three times.关键词：linear motor bogie;primary rubber traction joint;optimization design;finite element analysis;fatigue test
- 383
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- 4
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发布时间：2021-12-13 - 摘要：Vehicle auto-driving technology is a control technology that senses the surrounding environment based on environmental awareness, and controls the steering and speed of the vehicle through the on-board center computer according to the acquired information, so that the vehicle can drive safely and reliably and reach the predetermined destination. Based on the machine vision in automatic driving technology, vehicle signs and signal lights were recognized by on-board camera installed on the vehicle, which allows the vehicle to identify the position of the vehicle and implement braking parking in the process of self-stop parking without human participation. Machine vision measured and judged the function of human eyes by sensors and cameras, which was the trend of vehicle development in the future. Benchmarking parking was only one of the functions that machine vision can accomplish. In the future, through the camera installed on the vehicle, the machine vision of rail transit can be realized, real-time road information can be grasped, and the surrounding environment can be perceived, which will play a more important role in alleviating traffic pressure, improving urban traffic efficiency and improving energy utilization.关键词：auto-driving;machine vision;on-board camera;benchmark parking;urban rail transportation;metro vehicle
- 1646
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- 2
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发布时间：2021-12-13 - 摘要：Based on coupling effect of working grounding and protective earthing of traction system of urban rail vehicles, the electromagnetic interference mechanism of the system was analyzed, and the system simplified calculation model of the interference was put forward. The model had the advantages of simple structure and clear physical meaning, and was suitable for both time domain and frequency domain analysis, which could be used to estimate the system high frequency interference. Through the actual urban rail vehicles traction system equivalent modeling, high frequency interference current of the system was calculated, and the accuracy of the theoretical model was verified by experiments. Finally, a simple and efficient method of electromagnetic interference optimization was proposed, and the experimental results verified the effectiveness of the optimization method.关键词：urban rail vehicles;traction system;electromagnetic interference;high frequency modeling;interference suppression
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- 12
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发布时间：2021-12-13 - 摘要：On the basis of the entire vehicle structure of the existing rubber tire train, a new type M+T+M three-module marshalling form was proposed. The influence of the number of air springs on the changes in the position of the vehicle body and the running gear, the influence of the shock absorber, and the articulation method of the axle bridge were studied. The calculation results showed that the support mode of the two air springs was higher than the support mode of the four air springs in the amplitude and convergence time of the outgoing curve. By adding shock absorbers between the vehicle body and the running section, the amplitude and convergence time of the two air spring support modes could be well reduced. When using four air springs, the two-axle bridge showed better performance through a swivel joint, and the use of fixed hinges provided better performance when two air springs were used.关键词：rubber tire train;urban rail transit;structural form;air spring;shock absorber;axle bridge
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- 2
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发布时间：2021-12-13 - 摘要：The dynamic models of 70% low-floor trams using groove track and non-groove track were established respectively. Several aspects were discussed including analysis of the condition which occurs flange contact, exploring flange contact effects on dynamic of groove track, optimizing the distance of rolling tread circle. The results of the dynamic performance of trams based on groove rail showed that: flange contact is very unfavorable to wheel alignment, so it is necessary to ensure that the wheel is not in contact with the groove track in vehicle design; increasing the distance of rolling tread circle is a quick way to avoid the flange contact and proper increasing the distance of rolling tread circle is beneficial to vehicle dynamic property.关键词：groove track;flange contact;tram;dynamic performance;distance of rolling tread circle
- 411
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- 3
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发布时间：2021-12-13 - 摘要：Ningbo rail transit line 1 and line 2 phase I vehicles were designed and manufactured by the same company. The main differences between the two vehicles were the different suspension schemes under the frame, and the technical parameters of the vehicles were basically the same. By summarizing and comparing the two different suspension schemes and their applications, the characteristics and differences of the corresponding equipment suspension platforms of the two vehicles were analyzed, which provided a reference for the subsequent vehicle design and selection.关键词：urban rail vehicle;equipment arrangement;side beam suspension;suspension seat suspension;equipment hang;hanging beam
- 845
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- 5
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发布时间：2021-12-13 - 摘要：In order to meet the needs of intelligent detection and monitoring of catenary in the main line section of Lanzhou-Urumqi high-speed railway line above altitude 2 500 m, a catenary detection vehicle for Qinghai-Tibet railway high-speed section was developed. A series of measures had been taken to adapt to the harsh climatic conditions such as high altitude, low atmospheric pressure, anoxia, high cold, windy sand and strong ultraviolet radiation in the plateau area. The vehicle was equipped with catenary suspension condition detection and monitoring device, which could carry out high-precision imaging detection of catenary suspension system components. On the basis of automatic identification and analysis of test data, maintenance suggestions were formed to guide catenary maintenance.关键词：catenary;inspection vehicle;inspection of suspended status;Qinghai-Tibet railway;plateau area;high altitude;dynamic performance;high-speed railway
- 768
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- 6
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发布时间：2021-12-13 - 摘要：In order to study the effect of the time delay on the stability of EMS maglev train and solve the problem of instability of maglev train, a single degree of freedom electromagnetic suspension model based on double loop feedback control system was established. Based on the time delay of controller, the Routh-Hurwitz stability criterion was used to determine the characteristic root distribution of the system. The critical threshold of Hopf bifurcation was provided quantitatively. It was pointed out that when the controller delay was larger than the critical value, the system equilibrium point was no longer stable. A single-degree-of-freedom maglev bench was developed. The correctness of the theoretical analysis was verified by numerical simulation and bench test.关键词：maglev system;controller time delay;Hopf bifurcation;experimental bench;delay critical value;maglev train
- 661
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- 3
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发布时间：2021-12-13 - 摘要：A method of automatic correction of wheel diameter using GPS speed was proposed, and the judgment conditions for entering the correction of wheel diameter and the compensation method of speed sequence were designed. The problem of extracting effective speed signals from GPS signals containing a lot of noise and time delay was solved, and the high precision (error is less than 2 mm) adaptive correction of locomotive wheel diameter was realized. The validity and accuracy of this method have been verified in the South African electric locomotive project.关键词：locomotive wheel diameter;automatic wheel diameter correction;GPS speed;speed timing compensation
- 460
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- 7
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发布时间：2021-12-13 - 摘要：Aiming at the multi-hinge spatial motion mechanism of pantograph, the relative coordinate method of local coordinate system was used to express the parameters of hinge position in two-dimensional space, and the optimization Latin square method was used to optimize and reliability analysis of the bow-head rotation angle. The bow-head angle was significantly reduced, and the bow-head sliding plate could achieve excellent translation state and reliability index, which could rapidly and effectively provide technical support for the design of hinge pantograph mechanism.关键词：pantograph;collector head rotation angle;optimization analysis;reliability analysis
- 585
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发布时间：2021-12-13
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