This paper addresses the problem of vibrations produced by switched reluctance actuators, focusing on the linear configuration of\nthis type of machines, aiming at its characterization regarding the structural vibrations. The complexity of the mechanical system\nand the number of parts used put serious restrictions on the effectiveness of analytical approaches. We build the 3D model of the\nactuator and use finite element method (FEM) to find its natural frequencies. The focus is on frequencies within the range up to\nnearly 1.2 kHz which is considered relevant, based on preliminary simulations and experiments. Spectral analysis results of audio\nsignals from experimental modal excitation are also shown and discussed. The obtained data support the characterization of the\nlinear actuator regarding the excitedmodes, its vibration frequencies, andmode shapes, with high potential of excitation due to the\nregular operation regimes of the machine. The results reveal abundant modes and harmonics and the symmetry characteristics of\nthe actuator, showing that the vibration modes can be excited for different configurations of the actuator. The identification of the\nmost critical modes is of great significance for the actuator�s control strategies. This analysis also provides significant information\nto adopt solutions to reduce the vibrations at the design.
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