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Analytic evaluation of magnetic force of novel sensor

This paper studied the evaluations of magnetic force of magnetic immersed body in magnetic fluids, which is the prerequisite and basis for a novel inertial sensor can achieve. The novel inertial sensor is proposed based on the levitation characteristic of magnetic fluid and can be applied to many specific areas. The analyzed and calculated of the second-order magnetic force in such system is the key physical to ensure the permanent magnet to achieve a stable suspension, and it also difficult to solve. This paper established a magnetic force model of cylindrical permanent magnet, and the set of equations by the Laplace equation, transformation of coordinate equation, and boundary relationship. Finally, analytical solutions of magnetic field strength of immersed cylindrical permanent magnet obtained through approach of mathematical physics. The results are universal and must of great significance in research of levitation characteristic of magnetic fluid, including its possible applying for different novel sensors.