Abstract:In response to the needs of unmanned anti-mine platforms, we have proposed a novel electromagnetic drive structure designed to achieve a compact structure, large displacement output, and powerful very low frequency (VLF) radiation capabilities. This structure is distinguished by its simple design, linearization of input and output, and a high driving force-to-current ratio. Based on the operating principles of the electromagnetic drive structure, we have established an equivalent magnetic circuit model and further developed a dynamic model. The accuracy of these models was verified through a finite element simulation model, with simulation results matching theoretical predictions. Under excitation from 30 to 200 Hz, the sound source level of the new electromagnetic drive structure exceeds 145 dB, reaching 185 dB at the resonant frequency of 70 Hz. This meets the requirements for high-power VLF output and, through modular assembly, achieves a high sound source level output, providing theoretical support for the design of new mine-sweeping sound sources.