Dynamic characteristics analysis of electromagnetic resonance fatigue testing machines

CHEN Bei， JIANG Wei， GAO Hong-li， YUN Yan， WANG Jian-miao
（Key Laboratory of E&M， Ministry of Education & Zhejiang Province，
Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： Aimming at the problem for the analysis of the dynamic characteristics of electromagnetic resonance fatigue testing machine，the natural system frequency and workspace maximum amplitude were calculated based on the resonance vibration theory. The simulation analysis on the influence of sample stiffness to the natural system frequency and workspace maximum amplitude was performed，and the detailed instruction was given through graphs. In the last，the experiment platform based on virtual instrument was built. The result indicates that the experimental datas are accorded with the simulation results，which proves the correctness of the established dynamic model within the permitted error range. It has provided a high-precision control theoretical basis of frequency and work load of electromagnetic resonance fatigue testing machine，and which have certain engineering value is a benefit for engineers to do systematic forecasting analysis according to the model of the dynamic function.
Key words： resonance fatigue testing； dynamic characteristics analysis； natural frequency； maximum amplitude