Comprehensive Experimental Technique Research Of Railway Transport Equipment Based On Rolling Rig

In recent years,the rolling rigs for rail transportation equipment has been recognized for its less labor and material testing costs,more relaxed and safe testing environment,and a more efficient and reliable testing system.Flexible and universal test conditions gradually replaced the dynamic test of rail transit equipment and lines,which greatly shortened the time of the rail transit vehicles.The development cycle provides a strong test basis for faster,safer and more efficient operation of rail transit vehicles.Based on the rolling rigs to implement the dynamic characteristics of rail transit equipment testing needs to support the relevant test technology,which is also a constraint for continued development.Therefore,this paper is based on the rolling rigs,the electrical traction and braking of rail transit equipment,vehicle energy consumption testing and resistance simulation and air techniques are investigated and alternative methods for the overall design of the rolling rigs are provided.The main research elements of the paper are as follows.Based on the electrical traction and braking model of the rolling stock and metro vehicles,the electrical traction and braking test of the converter,motor and the gearbox design are analyzed to clarify the research objectives of the power supply system for energy feedback energy saving design and PV energy efficiency optimization.In the energy feedback design,the wheel pair drives the rotation of the rolling test bench track wheel,which transfers mechanical energy to the load motor,which returns electrical energy to the Single-phase AC power supply system.Efficiency optimized design using a GPG-Z source boost converter,dual active bridge converters,LCL filter,passive integrated DC /AC converter to improve the stability and system transmission efficiency of PV microinverters.In order to realize the selection of electrical traction braking test equipment for different rail transit equipment,a set of design method of mechanical characteristic curve of transmission system based on variable frequency AC motor is designed to quickly complete the matching of characteristics and parameters between the test bench.In order to achieve the same energy consumption test trials as line tests on rolling rigs for rail transit equipment.Using traditional control parameterization methods to study the problem of energy-efficient train manipulation with displacement as the independent variable,infinite dimensional speed limit constraint and non-smooth.The processing strategy of traction boundary constraint transforms the train energy saving manipulation problem into a non-linear planning problem.On the basis of fixed point and fixed speed,an automatic control method is introduced to simulate a rail transit loop uplink line to achieve energy consumption test trials Process Control.The slope control algorithm is used to constrain the vehicle speed within the envelope of the torque speed curve to achieve stable control of the vehicle speed.And take the subway vehicle as an example,to realize the rail transit equipment in rolling test bench simulated operation resistance and energy consumption test.In order to realize the dynamic testing of railroad equipment aerobrakes on rolling rigs,the idea of electrical inertia simulation is introduced to control the output of the motor in the braking process of the vehicle to simulate the braking effect equivalent to the mechanical flywheel inertia.In order to realize the fast simulation of electrical inertia and fast tracking of motor speed,a direct torque control of asynchronous motor based on a sliding-mode variable structure is designed.The slide-mode variable structure torque magnetic chain controller reduce the sensitivity of the speed regulator to changes in system parameters and external interference.At the same time,the mechanical flywheel inertia simulation is matched on the basis of the electrical inertia to automatically compensate for errors caused by mechanical system resistance and improve the Inertia simulation accuracy.And dynamic trainset as an example to complete the air brake function design and software control.The test of dynamic testing of rail transit equipment with air brakes on the rolling rig is realized.Summarize the complete design process such as main body composition,system design and parameter reasoning of the whole vehicle rolling rig,and the similarities and differences in the design of test specimens and rolling rigs for different test items are used to provide a complete set of dynamic test equipment for rail transportation.Design methods for rolling rigs for property testing.The basic parameters,mechanical parameters,electrical parameters and other characteristics of the parameters for detailed reasoning calculations.Finally,four types of traction systems stock and rolling stock are designed,such as traction systems,mainline rolling stock,high-speed unit trains and road maintenance vehicles.The overall parameters and functionality of the rigs provide options to meet different test equipment and different test types for rolling test stand testing.