Development of an Electromagnetic Pyroshock Environment Simulator and Its Shock Response Analysis

The high-frequency and high-amplitude pyroshock environment during the use of spacecraft will cause damage to the equipment. To simulate this environment, a pyroshock environment simulator based on electromagnetic excitation is presented in this work. A multiphysics finite-element model with electromagnetic–force coupling is established to analyze field distributions during excitation and the acceleration response of a resonant plate under Lorentz loading. Parametric analyses examine coil structural parameters, coil current, and plate thickness and their effects on the SRS. It is suggested that the pyroshock environment excited by electromagnetic force has the characteristics of wide frequency band and high amplitude similar to the explosive-based pyrotechnical event, and compared with the single coil, the multi-coil combination can excite a higher peak acceleration without changing the SRS shape. At the same time, the structural parameters of the planar induction coil and the current in the coil only affect the SRS amplitude of the resonant plate, and the degree of influence of the parameters on the SRS peak amplitude is coil width > coil lift-off distance > coil thickness > coil turn-to-turn distance. Additionally, the experimental results are in good agreement with the simulated SRS, verifying the validity of the above-mentioned analysis.