Leading type control method and system applied to driving magnetic suspension system

The invention discloses a leading type control method and system applied to a driving magnetic suspension system. The leading type control method comprises the following steps that a displacement signal is measured; differential operation is carried out on displacement to obtain a speed signal; and a PID control, an adaptive control and a sliding mode variable structure control are introduced, thelocated stage of a guide rail is judged according to a value of the speed signal, and the strength of three control algorithms is changed to form different characteristic leading control strategies by adjusting factor coefficients of the three control algorithms in an online mode. In an initial operation stage, a stable operation stage and a disturbance affected operation stage, effective controlis carried out according to the characteristic showed by the system; a "soft switching" mode is adopted to avoid the instability caused by the switch in the transition period; and the period and thephase position of the input