Electricity: motive power systems – Positional servo systems – Multiple mode systems
Patent
1992-05-26
1993-11-16
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Multiple mode systems
318590, 318615, 318593, G05B 1118
Patent
active
052627071
ABSTRACT:
A positioning control method and apparatus in which a fine movement mechanism is moved without exceeding a movable area so that positioning of a large amount of displacement can be attained with high accuracy and high-speed positioning from a point to a point with the same control method. A coarse movement mechanism (101) has a large amount of movement and low positioning accuracy and a fine movement mechanism (102) on the coarse movement mechanism has a small amount of movement and high positioning accuracy. A signal E4 based on a error signal C4 of a movement command signal A4 of a signal generator (104) and a displacement signal B4 representative of a displacement of an object to be positioned with respect to a fixed position detected by an absolute position detecting device (105) is supplied to the fine movement mechanism and a coarse movement command signal M4, produced by adding a signal representative of a relative displacement of the fine movement mechanism (102) with respect to the coarse movement mechanism (101) detected by a relative position detecting device (133) to the error signal C4, is supplied to the coarse movement mechanism (101) to thereby control respective movements.
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Patent Abstracts of Japan, vol. 9, No. 311 (M-436) (2034) Dec. 7, 1985 & JP-A-60 146 650 (Toshiba Kikai K.K.) Aug. 2, 1985; Abstract.
Proceedings of the 1988 American Control Conference, vol. 1, Jun. 15, 1988 pp. 127-132; Staroselsky et al., "Two-Stage Actuation . . . "
Asano Shin
Goto Takayuki
Okazaki Yuichi
Agency of Industrial Science and Technology
Masih Karen
Mitsubishi Jukogyo Kabushiki Kaisha
Shoop Jr. William M.
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