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In the time optimal control problem, it is important to select a switching point accurately in order to improve tracking speed performance. However, the accurate selection of the switching point is not an easy task because of the damping coefficient variations and modeling uncertainties in actual systems. To relieve the difficulty and inconvenience of this task, adaptive model-following control...
A coarse/fine pair control system is suggested to relieve the difficulty of obtaining high accuracy over a large movement. A coarse actuator which is capable of high force in a large working range is developed using electromagnetic principle. A fine actuator having a high accuracy is introduced using a piezoelectric material. The coarse/fine actuator pair system is applied to magneto-optical (MO)...
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