Rotational speed oscillation characteristic and decomposition algorithm of torsional vibration

For analysing the torsional vibration characteristic of rotary mechanical drive system, a new highly active calculation decomposition algorithm was proposed by using series decoupled method. When the elastic driving shaft and motor shaft had speed oscillation, the decomposition algorithm could develop nonlinear differential equation into a series of algebraic equation and series solution had been gained, which could be calculated quickly. By taking the theoretical values of rotational speed oscillation obtained by the new decomposition algorithm as the forecasting control values of electric motorpsilas rotational speed output, the torsional vibration of rotary mechanical drive system can be restrained effectively. The correctness of the decomposition algorithm was verified through the torsional vibration testing experiment.