Aiming at the problem of propeller aircraft micro-motion feature detection,a method for detecting the mi-cro-motion characteristics of a propeller was proposed.Firstly,the target motion model was assumed and its echo expression was obtained.The measurement data of aircraft's motion trajectory were obtained by radar vernier ranging method.Since the regular ranging increment of the target did not contain the micro-motion component,it compen-sated the Doppler distance increment and removed the translation component,thus obtaining the detection result of the target micro motion.Finally,combining with the radar RCS measurement data,the propeller parameters and the measured data were obtained.The method can effectively estimate parameters such as the propeller rotation speed,micro-motion component,and blade number.
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