Abstract
The rolling resistance between the balls and the wall of the automatic ball balancer (ABB) significantly influences the balancing performance of the optic disk drive system from theoretical analysis and experimental observation. This thesis focuses on the study of the effect of rolling resistance on ABB. The investigation begins from constructing the mathematical model of the ball rolling resistance. It is followed by deriving the equations of motion for the balls and equivalent stator. Then the steady-state solutions are obtained and the stability of each solution is analyzed by using multiple scale method. The performance of the system is simulated by using the software SIMULINK. Besides, the value of the rolling resistance for aluminum, copper, and steel were measured and the balls in ABB were also observed. Finally, this thesis provides a design guideline about how to reduce the rolling resistance of the balls in contact with the wall of ABB system.