Multi-degree-of-freedom spherical electric magnetic levitation momentum wheel

Abstract

The invention provides a multi-degree-of-freedom spherical electric magnetic levitation momentum wheel, which is composed of an external support assembly, a spherical driving motor and an internal electric magnetic levitation momentum wheel. The outer support assembly locates and fixes the stator of the spherical drive motor and provides spherical support for the spherical mover. Sinusoidal alternating current with different phases is introduced into the stator coil array of the spherical drive motor to form traveling wave magnetic field with different directions, which can drive the whole spherical mover to change its spatial orientation, and then the spatial orientation of the maglev momentum wheel rotating shaft can be adjusted in a large range. At the same time, according to the principle of electric drive, the momentum wheel of internal electric magnetic suspension is driven by both stable suspension and rotating around the axis, so as to realize the complete control of the rotational axis direction and rotational speed of the momentum wheel of internal magnetic suspension, and finally realize the multi-axis active control of the attitude of the spacecraft.

Description

Technical field [0001] The invention is a multi-degree-of-freedom spherical electric magnetic levitation momentum wheel, which is used as a novel actuator of a spacecraft attitude control system. Background technique [0002] Momentum wheel and control moment gyroscope are widely used in spacecraft attitude control system actuators. Each momentum wheel has a fixed rotation axis orientation relative to the spacecraft, which can provide the spacecraft with the ability to control the attitude in a specific direction. Therefore, at least three momentum wheels can be arranged to fully realize the three-axis attitude control of the spacecraft. Although the multi-frame control moment gyroscope can realize the adjustment of the rotor shaft, every time an adjustment degree of freedom is added, an external frame and its driving system need to be added, making the overall structure complex and not compact. Both of the two types of spacecraft actuator structures occupy larger spacecraft spa...

AI Technical Summary

Problems solved by technology

However, for this kind of momentum ball configuration, in-depth analysis shows that when the spherical mover rotates along any axis, the eddy current on the surface of the stator will cause an additional electromagnetic resistance torque, which hinders the increase in the speed of the spherical mover, which greatly limits this structure. The limit speed of the mover ball leads to its limited ability to adjust the attitude of the spacecraft

The publication number is CN104176277A, and the patent titled a four-degree-of-freedom double-frame magnetic levitation control moment gyroscope proposes a control moment gyroscope composed of a four-degree-of-freedom magnetic bearing, a high-speed motor, an inner and outer frame, etc., but its structure is complicated and the frame ends A torque motor is installed inside to drive the frame to rotate, and the torque motor is large in size, which makes the entire double-frame maglev control torque gyro bulky and occupies a large space resource of the spacecraft

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