The invention provides a double-permanent-magnetic-tube two-end symmetric excitation cylindrical
low frequency vibration calibration table with
magnetic field tracking compensation, belonging to the field of
vibration measurement technology. A cylindrical closed type
magnetic field structure design is provided. Two cylindrical permanent magnetic tubes are symmetrically installed at two ends of an
electromagnetic drive structure and face
magnetic poles. Two symmetric closed magnetic circuits are formed by
magnet yokes. The magnetic induction intensity distribution with high uniformity is generated in air gaps. The surfaces of the
magnet yokes adjacent to the air gaps are provided with an array type
micro structure in the form of deep trenches, and the
eddy current loss can be effectively inhibited. A center
magnet yoke is provided with a compensation coil, and a formed compensation
magnetic field carries out synchronous tracking compensation on the influence of an armature reaction. The organic integration design of air lubricated guide technology is employed, and outstanding
electromagnetic drive mechanical performance and high movement guide precision are obtained at the same time. According to the double-permanent-magnetic-tube two-end symmetric excitation cylindrical
low frequency vibration calibration table, large
stroke, high thrust, a linear electromagnetic driving force characteristic and high movement guide precision can be considered, and a high precision and large
stroke high performance
low frequency vibration calibration table technical scheme is provided for low-frequency / ultra-
low frequency vibration calibration.