Servo steering engine ground hydraulic-protection-free logic algorithm

The invention belongs to the technical field of aircraft servo actuation system steering engine control, and relates to a servo steering engine ground hydraulic-protection-free logic algorithm, which is characterized in that steering engine ground hydraulic-protection-free logic is executed by designing software connected with a steering engine, and the software receives the state of an aircraft in real time; when the aircraft is in a ground state, all hydraulic systems of the aircraft are in a non-pressure state, and the absolute value of a force driving coil control instruction exceeds a certain amplitude and lasts for more than a period of time, steering engine ground non-hydraulic protection logic is executed; when it is judged that the aircraft is in a flight state, any hydraulic system of the aircraft is in a pressure state, the absolute value of a drive coil control instruction is lower than a certain amplitude value and lasts for a period of time, the servo steering engine is quitted from the ground n