| 摘要 |
A system (10) and method (148, 200) of controlling position of a pick-up head (100, 150) of an optical drive (10), including manipulating (158, 208) the position of the pick-up head (100, 150) as a primary variable in a cascade control scheme (148), and manipulating (166, 200) current flowing through the pick-up head (100, 150) as a secondary variable in the cascade control scheme (148). |
