Airplane slat fatigue test servo system angle compensation control method and system

The invention belongs to the field of aircraft fatigue test design, and particularly relates to an angle compensation control method and device for an aircraft slat fatigue test servo system. The method comprises the following steps: acquiring a displacement value fed back by an actuator cylinder, and calculating a first deflection angle of deflection of a follow-up frame caused by expansion and contraction of the actuator cylinder based on the displacement value and a preset displacement angle model; intercepting a second deflection angle sent by the current slat airfoil driving system to the airfoil driving mechanism; determining an angle difference value between the first deflection angle and the second deflection angle; a displacement compensation amount is reversely solved for the angle difference value through a displacement angle model; and superposing the displacement compensation amount into a displacement instruction to realize angle compensation control of the servo system. According to the inventi