Print Email Facebook Twitter Stability of double gimballed momentum wheels Title Stability of double gimballed momentum wheels Author Boersma, G. Sonnenschein, F.J. Institution National Aerospace Laboratory NLR Date 1973-10-01 Abstract Due to the finite stiffness of rotor- and gimbal-suspensions, a double gimballed momentum wheel will oscillate with high natural frequencies. The stability of these oscillations is studied, in order to obtain requirements for the stiffness of the suspensions and/or the gimbal inertia properties. From energy considerations, it is concluded that double gimballed momentum wheels are liable to suffer from instability, if the suspension is such, that the force in a certain direction depends on the displacement in a perpendicular direction. This will occur for hydrodynamic rotor bearings. Por a momentum wheel using these bearings, an equation for the boundary of the stable region is derived and approximate solutions of this equation are obtained. The approximate solutions are compared with numerical solutions - obtained using a digital computer - for some typical configurations. Subject hydrodynamic bearingsstability analysissatellite attitude controldouble gimballed momentum wheelsstability criteria To reference this document use: http://resolver.tudelft.nl/uuid:e48f1deb-c097-4b3e-8250-80368b68f8f7 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TR 73112 U Part of collection Aerospace Engineering Reports Document type report Rights (c)1973 National Aerospace Laboratory NLR Files PDF NLR_TR_73112_U.pdf 19.13 MB Close viewer /islandora/object/uuid:e48f1deb-c097-4b3e-8250-80368b68f8f7/datastream/OBJ/view