Multi-mode electric thruster service life prediction method based on time-varying stress

A multi-mode electric thruster service life prediction method based on time-varying stress comprises the following steps: acquiring working modes of different detection stages and working time corresponding to each working mode; obtaining sputtering etching initial degradation rates, drift coefficients and diffusion coefficients under stresses of different working modes through a pre-trained parameter prediction model; calculating the sputtering etching degree of the grid system of the electric thruster under the time-varying stress according to the sputtering etching initial degradation rate, the drift coefficient and the diffusion coefficient; according to the sputtering etching degree of the grid system of the electric thruster under the time-varying stress, the abrasion change condition of the grid under the stress is calculated; setting a sputtering etching threshold value, calculating the time required for reaching the etching threshold value of the acceleration gate in each working mode according to th