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A stabilized platform having five degrees of freedom utilizes a platform supported on a base by a spherical bearing which permits movement about roll, pitch and yaw axes. A triaxis torquer has a non-magnetic stator depending from the platform, permanent magnet rotors disposed on the base which produ

A stabilized platform having five degrees of freedom utilizes a platform supported on a base by a spherical bearing which permits movement about roll, pitch and yaw axes. A triaxis torquer has a non-magnetic stator depending from the platform, permanent magnet rotors disposed on the base which produce a magnetic field through the stator, and a set of electrical windings attached to the stator. Energizing the windings selectively produces torque in roll, pitch and yaw. A mirror gimbal and drive system on the platform provides movement in elevation of a mirror. A motor is provided for rotating the base in azimuth relative to its mounting in a vehicle or the like. A set of rate gyroscopes mounted on the platform and a set of resolvers provide rate of movement of the platform and gimbal, and position information to a servo system which controls the torquers and drive systems to stabilize the platform in roll, pitch and yaw, and to position the mirror in elevation and azimuth. Laser and infrared optical devices may be mounted on the platform and coupled by the mirror to a desired line of sight.

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A triaxis controllable platform comprising: a vertical center post having a vertical axis and an essentially horizontal base; a spherical bearing assembly having an outer race disposed on an upper end of said vertical center post and an inner race; a normally horizontal platform attached to and supp

A triaxis controllable platform comprising: a vertical center post having a vertical axis and an essentially horizontal base; a spherical bearing assembly having an outer race disposed on an upper end of said vertical center post and an inner race; a normally horizontal platform attached to and supported by said inner race thereby having freedom of motion in three mutually orthogonal axes; an annular stator having a thin wall, formed from non-magnetic material, attached to and dependent from said platform and disposed around and concentric to said center post axis; at least one first rotor magnet assembly attached to said base for producing a first magnetic field through said stator wall; a first stator electrical coil disposed on said stator wall and within said first magnetic field and oriented to cause movement of said platform along a first of said axes when energized by a direct electrical current; at least one second rotor magnet assembly attached to said base for producing a second magnetic field through said stator wall; a second stator electrical coil disposed on said stator wall and within said second magnetic field and oriented to cause movement of said platform along a second of said axes when energized by a direct electrical current; at least one third rotor magnet assembly attached to said base for producing a third magnetic field through said stator wall; and a third stator electrical coil disposed on said stator wall and within said third magnetic field and oriented to cause movement of said platform along a third of said axes when energized by a direct electrical current.