Servo control method for continuously variable Mach number of high-speed wind tunnel nozzle profile

The invention discloses a high-speed wind tunnel nozzle profile continuous variable Mach number servo control method, which relates to the field of servo control in a wind tunnel test, and comprises the following steps: step 1, selecting a main shaft and slave shafts of a servo system, and respectively establishing a mapping relation between the position of the main shaft and the nozzle profile Mach number and a motion relation between the main shaft and each slave shaft; 2, planning motion tracks of the main shaft and the slave shaft based on the mapping relation and the motion relation; and step 3, performing real-time compensation on the cooperative error of the slave shaft relative to the main shaft in the multi-shaft motion. According to the servo control method for the continuous variable Mach number of the high-speed wind tunnel nozzle profile, on the basis of master-slave control, a motion track planning strategy is adopted, the limitation that an existing control strategy is only applied to multi-axi