Acoustic velocimetry method for high speed platforms based on Doppler factor compensation
The self-velocity estimation of underwater motion platform is achieved by using acoustic Doppler velocimetry techniques,where the core of the estimation is the complex correlation process.Under the high-speed condition,the enhanced Doppler effect causes echo optimal correlation shifting from the prior correlation peak position,resulting in velocity measurement errors.In response to the above issues,a broadband binary phase shift keying(BPSK)speed measurement method for high speed platform is proposed based on Doppler factor compensation in correlation domain.The method proposed in this paper corrects the conventional complex correlation velocity measurement results by iteratively estimating and compensating for the Doppler factor.The simulation results show that the corrected speed estimation accuracy is improved by more than 5‰ on average,effectively optimizing the self-speed estimation performance of the high-speed motion platform.
万方数据
维普
