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According to the current invention, these and different objects are attained in a gyroscope having a rotor immediately connected to an axial suspenseion wire held in pressure in a drive shaft for the rotor. The drive shaft and the suspension wire are instantly alongside the rotor spin axis. The wire permits restricted rotation of the rotor about any axis perpendicular to the shaft axis but att breaux bridge the wire restrains axial displacement of the rotor. Magnets affixed to the shaft and the rotor act as a magnetic bearing supporting the rotor and restraining radial displacement thereof. As another approach, not shown within the drawing, a magnetic bearing for the speed gyroscope of FIG.
1 may be fabricated utilizing cylindrical permanent magnets mounted on the shaft 10 and inner rotor flange 32 where the cylindrical everlasting magnets are axially polarized. Such magnets can be used along side end pieces of excessive permeability material for directing the magnetic flux in the radial course. The magnets and end items would replace magnetic r.ings 36, 38, 40 and forty two. The end pieces would ideally be given the identical lobed shape as is proven for the rings 36 and 38 in FIG. 1 is an elevation view, partly in cross-section, of a drive shaft and rotor for a two-degree-of-freedom price.gyroscope in accord with the invention. 2 is a cross-section view of the rotor and shaft proven in FIG.
When autocomplete outcomes can be found expend and down arrows to evaluate and enter to pick out. Touch system customers, discover by touch or with swipe gestures. Blanche has had numerous books dedicated to his work published, including The Prince and the Woodcutter, and Ratspike with fellow illustrator Ian Miller. We are grateful to Stephen Lewis for his help with compiling this entry. Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.
Because of the low spring rate of the wire, only a similarly low adverse spring fee shall be required of the magnetic bearing for cancellation of the adverse and positive coupling.torques as mentioned above. As is well-known, cancellation of such quantities is extra readily accomplished when the portions are small. The combined use of a wire for axial help and a magnetic bearing for radial help of the rotor 12 thus readily supplies the very low ranges of cross-axis coupling required in a excessive performance displacement gyroscope.
The arms forty eight of the spider by which the rotor 12 is hooked up to the wire 24 are formed to supply an attachment thereto without interfering with the positioning of the magnetic rings 44 and forty six. Whereby enabling stated gyroscope to operate as a displacement gyroscope having two degrees of freedom. Of course, controlled torques which can be utilized to the rotor 12 by, for instance, electromagnetic torquers are in addition to the coupling torques discussed hereinabove. The adjacent surfaces of magnetic rings 40 and forty two are conformed to each other in the same undulated, lobed pattern as is offered for rings 36 and 38 for a similar reasons. The magnetic bearing described herein could also be fabricated comparatively simply and inexpensively inasmuch as tolerances for the scale of the rings 36, 38, forty and 42 may be relatively liberal. Tolerances within the vary from about 0.1 to zero.5 mil are expected to be enough for these magnetic components.
In addition, it is a design objective that the slope of curve 52 on this region be equal in magnitude, albeit opposite in sign, to the slope of the attribute curve 50 for the restoring torque supplied by the wire 24. When these design objectives are met, the torques of the elastic and magnetic suspensions nullify each other within the area between strains 54 and 56. This result’s illustrated in the attribute curve fifty eight representing the composite coupling torque acting on the rotor 12 perpendicular to its spin axis.
1, a magnetic bearing is supplied for radially supporting and restraining the rotor 12 to maintain it centered with respect to the shaft 10 at any orientation of the shaft 10 relative to gravity. To accomplish this, a ring 36 of magnetized material is mounted on, and ideally connected to, the shaft 10 at a specific distance to at least one aspect of the center plan 29 of the rotor 12. Ring 36 is nested within and concentric with a second ring 38 of magnetized materials mounted on, and preferably connected to, the inside’flange 32 of the rotor 12.
