This paper presents an analytical model for the force and torque developed by a reaction
sphere actuator for satellite attitude control. The reaction sphere is an innovative momentum …

(57) ABSTRACT A vehicle incorporating a plurality of control motion gyro Scopes (CMTs)
contained within a Support structure is described. Optionally, a mass shifting mechanism …

This paper presents the rotor design optimization for a reaction sphere (RS) actuator. The
RS is a permanent-magnet synchronous spherical actuator whose rotor is magnetically …

THE concept of a spherical attitude actuator (also known as a reaction sphere) is similar to
that of a reaction wheel; by accelerating a mass about an axis, a reaction torque is imparted …

A system and method for controlling and stabilizing a satellite or other vehicle about any axis
is disclosed. Embodiments achieve this three-axis control and stabilization with a spherical …

This paper presents the development of an analytical model for the force and torque
developed by a Reaction Sphere for satellite attitude control. The Reaction Sphere is a …

Provided is a means for mitigating strict constraints between a virtual polyhedron inscribed
in a rotor and a virtual polyhedron inscribed in a stator of a spherical stepping motor and a …

Embodiments of a spherical momentum control device are provided. In one embodiment, the
spherical momentum control device includes a housing assembly bounding a cavity, a rotor …

The inductive reaction sphere (RS) brings the benefit of simple, economical, and
miniaturized design, and it is capable of multi-DOF torque generation. Thus, it is a suitable …

This paper describes a prototype and analytical studies of a three-degree of freedom (3-
DOF) spherical momentum exchange actuator for three-axis attitude control. Its moving part …