Abstract
Analytical simulations of ball bearing torque in Despun Mechanical Assembly (DMA) systems are obtained by integrating the general equations of ball motion under the prescribed operating conditions. Three types of traction-slip relationships for the ball/race contacts are investigated. The first model, representing a positive traction-slip gradient, provides fairly steady torques and no significant variations in torque as a function of time is observed. The other two models, denoting a constant traction coefficient and a negative traction-slip gradient, result in large torque variations. It is also known that the coupling between the traction model and the bearing kinematics is primarily responsible for such torque variations.
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