Research On Electromechanical Coupled Chaotic Vibrations For Electromagnetic Rail Launch System

Electromagnetic rail launch is a new kind of mission mode,which can accelerate object to ultra high speed.Electromagnetic rail launch system use electromagnetic force to drive the payload,convert electromagnetic energy into mechanical energy.It is the inevitable trend of the emission echnology’development.It will replace the traditional mission mode and be an important component of electrification and information of the existing weapons technology.During the launching process of the electromagnetic rail gun, the rail which can be simplified as a beam will produce transverse deformation while the continuous forward sliding of the armature.And its deformation amplitude will appear certain concussion, cause the vibration and even chaotic vibration of rail. That will result in adverse effects on the structure and the service life of electromagnetic rail launch system. Therefore, the research on electromechanical coupling chaotic vibration for electromagnetic rail launch system has important theoretical significance and practical value.Main results of paper are as below:The electromechanical coupled dynamic model of electromagnetic rail launch system is founded, and considering nonlinear electromagnet coupled force,nonlinear dynamic differential equations are educed. The time domain response is separately achieved by L-P method and Runge-Kutta method.The range of the theory analysis is determined by comparing the numerical and the analytical solutions.When considering current excitation, nonlinear dynamic differential simplified equations of electromagnetic rail launch system are educed. The equations are solved by Runge-Kutta method. The bifurcation rules of electromagnetic rail launch system are obtained. According to bifurcation maps, power maps, Time domain waveform, Phase maps and Poincare maps, the system’s bifurcation evolution rules are obtained with parameters changing.When considering velocity excitation, nonlinear dynamic differential simplified equations of electromagnetic rail launch system are solved by Runge-Kutta method. According to bifurcation maps, power maps, Time domain waveform, Phase maps and Poincare maps,the system’s bifurcation evolution rules are obtained with the parameters changing.Using mixed programming method of MATLAB and VB, a friendly interface,simple operation of the simulation software is developed, according to matlab own COM component technology. Efficiency of study on chaotic vibration is improved.