Method for controlling DC despun magnetic field through spatial non-magnetized metal chips

The invention relates to a method for controlling the DC despun magnetic field through spatial non-magnetized metal chips. Three coils perpendicular to one another are placed around the spatial chips, the direction of the spun magnetic field to be established is determined according to the characteristics of rotating movements of the spatial chips, currents I of the three coils are adjusted, and the magnetic field direction of field intensity of the magnetic field is the same as the direction of the current despun magnetic field. Compared with the prior art, the method has the advantages that the movement characteristics of the spatial chips are fully considered, and the direction of the despun magnetic field is determined according to the state of the rotating movement of the spatial non-magnetized metal chips; the direction of the magnetic field is adjusted in real time through three-axis positioning by means of the three coils perpendicular to one another by controlling the currents in a coil set parallel to the three-dimensional coordinate plane.