Reserch And Desing Of Measurement And Control System For High Speed Electric Contact Sliding Device

Sliding electrical contact is a dynamic form of electrical contact,the high-speed sliding electrical contact device can realize the transmission of electric energy and electrical signal during the sliding process,the device is widely used in transportation,military,aerospace and other fields.The high-speed sliding electrical contact device often works in the harsh environment of high voltage,high current and strong magnetic field,which leads to the complicated motion characteristics and modes.In order to ensure the normal operation of the device and test its performance,it is necessary to design a reasonable measurement and control system.This paper mainly studies the measurement and control system of high-speed electrical contact sliding device and verifies its feasibility.The main research contents of this paper are as follows:First of all,this paper describes the current research status of the control strategy and physical measurement method of the high-speed electrical contact sliding device.In the process of operation,the normal triggering of the pulse forming network is the key to ensure the normal operation of the device,so it needs to have high control accuracy.The speed measurement methods and working principles commonly used in this field are analyzed,aiming at the problem that the existing velocity measurement methods can not accurately measure the velocity of the slider,this paper proposes a voltage-type velocity measurement method.Secondly,the working principle of the pulse forming network is analyzed in detail,and the high-precision control scheme and anti-interference pulse signal transmission scheme are proposed.The mathematical model and finite element analysis model are constructed for the voltage-type velocity measurement method.The feasibility of the voltage-type velocity measurement method is verified by simulation and experiment.Thirdly,the design scheme of measurement and control system is studied: ds PIC33EP256MU806 microprocessor and peripheral circuit are used to generate 10-channel pulse sequence and 1-channel synchronous trigger signal.The acquisition of physical signals(including 10 current signals and 14 voltage signals)is realized by using data acquisition board card and high voltage isolation filter circuit.The upper computer control software is designed by using Lab VIEW platform,which can realize the functions of pulse sequence delay setting,pulse sequence signal triggering,data collection display and so on.Finally,the function of the measurement and control system is verified.On the premise of meeting the system performance index,the existing high-speed electrical contact sliding device platform in the laboratory was used for experiments,and the reliability of the measurement and control system was verified by the experimental data.By analyzing the track voltage data,it is concluded that the voltage-type velocity measurement method can accurately measure the speed of the slider between tracks.