A Projectile Signal Recognize Algorithm Using Variational Mode Decomposition and Wavelet Mode Maximum Fusion in Sky Screen Sensor and Its Application

To improve the measurement accuracy of projectile velocity and the recognition rate of projectile signal in the projectile's velocity test system, this article proposes a projectile signal recognize algorithm using variational mode decomposition (VMD) and wavelet mode maximum fusion to obtain the real information of the projectile that passes through the detection screen of the sky screen. We establish the calculation model of the output signal of the sky screen. Based on the basic theory of VMD and wavelet mode maximum, we provide a solving method of VMD variables, and the projectile signal recognition method and time extraction algorithm by VMD and wavelet mode maximum fusion. We apply the proposed recognition algorithm to the projectile velocity test system with double parallel detection screen that was constructed using sky screen. Through experimental testing, the results show that the proposed algorithm can accurately identify the projectile's information and accurately determine the projectile's time information in the projectile's velocity test system, and the measurement accuracy of projectile flight velocity is less than 0.1% by comparing with other methods.