Analysis of dynamic equivalent circuit model of single axle bogie

Numerical analysis of mechanical system dynamics has the problems such as programming difficulty and slow calculation speed. The paper takes the single-axle bogie as the research object, establishes the linear dynamic equations which has two degrees of freedom of the transverse and yaw motions, and uses MATLAB to carry out the numerical simulation of the equations. On the base, an equivalent circuit model is built using operational amplifiers, resistors and capacitors, and the same results as numerical simulations are obtained through Multisim simulation. The equivalent circuit model has the advantages of simple design, high speed, and real-time adjustable parameters. In addition, oscilloscope and spectrum analyzer can be used for real-time online analysis of results. The research results show that using equivalent circuit models to analyze the dynamics of n-DOF mechanical systems has certain reference value.