VSR Control System Design Of Large Vehicles Member

Unevenly distributed residual stress is generated inside of vehicle component during the manufacturing technical process, and load capacity, dimension precision and fatigue strength are negatively affected for the exiting of residual stress, which influences the security of railway transportation. It is concluded that vibratory stress relief is superior to others by much practice on several stress relief methods, and the vibratory stress relief is a energy-efficient, time-saving, user-friendly and good-effective method for removing stress. However, owing to the technology of vibratory stress relief referring to many relatively complicated subjects, many problems appear in actual application process, thus, this thesis designs the control system of vibratory stress relief with the foreground running application of Kingview, the background assistant of VB and their communication channel of dynamic data exchange, which is used to automatically control the VSR process, this thesis’ s main research contents are as follows:This thesis firstly takes the car body underframe of large vehicle component as study subject, simply analyses the formation of residual stress inside of car body underframe and the influence on materials performance of car body underframe, and studies the elimination mechanism of VSR and how to homogenize the inner stress of component.Secondly, this thesis detailedly illustrates about the choice of three parameters of vibration force, vibration frequency and vibration time in VSR process, and analysis determine method of several other parameters by theoretical research, simply introduces several ways for assessing the effect of VSR stipulated in JB/T5926-91, and theoretically analyses and illustrates the observational method for parameter curve adopted in this thesis.And then, through the analysis of actual demand on VSR control system, this thesis chooses main hardware vibration exciter and acceleration transducer, and designs vibration power based on the designed overall plan of VSR control system. On this basis,this thesis detailedly illustrates the software design about the functional module in VSR control system, including how to set the vibration parameters of current, time, frequency and frequency range, automatic frequency sweep, how to analyze the resonance peak, the display of vibration parameter and curve, the judgement of VSR effect, the read and display of U disk data, the communication with the lower system, guest registration and information management.Finally, through debugging analysis, the VSR control system by dominating vibration power applies pulse current on vibration exciter, and controls pulse magnetic field to make the giant magnetostrictive vibrator produce stretching vibration, and eliminates and homogenizes the residual stress inside of vehicle component by simulating impact vibration, which basically meets the monitoring requirements of the VSR process for component, and the system with friendly workspace can be operated safely and reliably, whose applications can be run smoothly.