Low-frequency extension design of angular rate sensor based on magnetohydrodynamics

The poor performance of magnetohydrodynamic (MHD) angular rate sensor because of the vicious and electromagnetic force at low frequency. Which has depressed its accuracy and application range. A preliminary study on the MHD angular rate sensor model with multiple pump structures to achieve the low-frequency bandwidth expansion. Physical model of the sensor is given, and then the structural design of the MHD pump is described. The numerical simulation based on the designed models. The simulation results demonstrate that multiple MHD pump improves the uniformity of radial velocity distribution, enhance the Coriolis effect at low frequency and accelerate the relative velocity. This study provides a framework for future analysis to minimize the error.