Shock wave plate control system and method for wind tunnel continuous variable mach number test

According to the shock wave plate control system and method for the wind tunnel continuous variable Mach number test, the system can realize uniform motion of the shock wave plate, the angle control precision is less than or equal to 0.05 degrees, and further in one type of temporary impulse wind tunnels, the Mach number of a flow field of a test section continuously changes from 2.5 to 3.0. The shock wave plate is driven by a motor to move, and the adverse effect of wind tunnel incoming flow on the shock wave plate can be eliminated aiming at the characteristics of large impact and large disturbance of wind tunnel test. The shock wave plate motion control process provided by the invention comprises the following steps: in a wind tunnel test, giving an angle of a shock wave plate, calculating a pulse number required by motor motion through a fitting formula, sending the pulse number to a motor driver through serial port communication, feeding back an actual shock wave plate position by adopting a high-precisi