A 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 suspension momentum wheel, which is used as a new type of actuator for a spacecraft attitude control system. Background technique [0002] Momentum wheels and control moment gyroscopes 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 attitude control capabilities in a specific direction. Therefore, at least three momentum wheels can be arranged to fully realize the active three-axis attitude control of the spacecraft. Although the multi-frame control torque gyroscope can realize the adjustment of the rotor shaft, it needs to add an external frame and its drive system for each additional adjustment degree of freedom, making the overall structure complex and not compact. Both spacecraft actuator structures occupy relatively large space resources ...

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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