The optimum design of a pick-up actuator for a minimum seek time

In this paper, we proposed a pick-up actuator that has a small size, mass, and high resonant frequencies. In order to reduce the mass of the moving part, the proposed actuator has only a pair of permanent magnets. The high resonant frequencies of the actuator are confirmed by FEM analysis. Also, we investigated an optimum design method to minimize the seek times of the actuator. This method uses the time optimal technique to minimize the seek time, with the characteristic values of 2-axis actuators as the constraints. Simulation results show that this method can reduce the seek time to less than that of the conventional method which maximizes the acceleration of the actuator.