Abstract:The propagation of the impact signal in the reinforced bulkhead structure of spacecraft is very complex, which hinders the rapid location of space debris impact. To solve these problems, a soft threshold filtering hyperbolic algorithm based on acoustic emission is proposed. The algorithm solves the difficult problem of judging the arrival time of the attenuation of the wave in the reinforced structure by the soft threshold scheme. The S0 mode with the fastest wave speed is preserved by filtering, which reduces the influence of the modal transition of the acoustic wave on the location. The influence law of ribs on Lamb waves is analyzed by finite element simulation. The energy passing ratio of S0 mode Lamb waves in different frequency bands is obtained to determine the filtering frequency band. The feasibility of the algorithm is verified by the location experiments of 20 impact points. For the experimental plate in this study, the best location result is obtained when the frequency band is 100~200 kHz, and the average absolute error is 559 mm.