Automatic steering engine of low-speed wind tunnel force test model

The invention discloses an automatic steering engine of a low-speed wind tunnel test model. The automatic steering engine of the low-speed wind tunnel test model comprises an elevator steering engine, a rudder steering engine and a control system, wherein the elevator steering engine is fixed in a vertical fin stabilizing plane, the rudder steering engine is fixed in a fuselage tail section, and driving motors, a lever, a connecting rod, a fixing support, encoders, a driving rod and rotating shafts are arranged; a servo control technology based on a controller area network (CAN) bus is applied to the control system, an upper computer communicates with a servo control unit through a CAN bus adapter, and the servo control unit is connected with the CAN bus. Functions of initialization, parameter setting, state feedback, controlling and the like on each servo unit can be achieved. According to the automatic steering engine of the low-speed wind tunnel test model, automatic accurate angle changing of an elevator and a rudder of the test model can be achieved in the process of a wind tunnel test by the aid of micro electro mechanical and automatic control technologies, labor intensity of test staff can be reduced, positioning errors caused by manual angle changing can be avoided, and the test efficiency of automatic angle changing is 40% higher than that of manual angle changing.