Turboshaft engine test NG rotating speed control method, device, equipment and medium

The invention provides a turboshaft engine test NG rotating speed control method, device and equipment and a medium. The method comprises the steps that the NP rotating speed, the NG rotating speed and the air inlet temperature of an engine are collected; inputting the target value of the NG rotating speed and the NP rotating speed into a rotating speed model to obtain a torque target value and a throttle lever angle value, inputting the torque target value into a dynamometer to enable the torque of the output shaft of the engine to be constant at the target torque, and inputting the throttle lever angle value into an electronic controller to adjust the NG rotating speed; when the difference value between the actual value and the target value of the NG rotating speed is within the preset range, NG rotating speed adjustment is conducted on the actual value, when adjustment is stable, a rotating speed output value is obtained, the rotating speed output value is compared with the expected difference, the self-co