Title:
SERVO-CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3810140
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To eliminate the need for releasing the hydraulic pressure acting on a hydraulic acator to restrict the generation of switching shock when switching between different feedback signals is performed.
SOLUTION: Between a control means 7 which compares a feedback signal outputted from a switching means 5 which performs switching between a displacement feedback signal from a displacement detector 3 and a load feedback signal from a load detector 4 to output either of the feedback signals, with a command signal and calculate it to output a control signal, and a driving means 10 which outputs a driving signal capable of amplifying the control signal to operate and control a hydraulic cylinder 2, a holding means 8 for holding the control signal which corresponds to the feedback signal, is provided in relation to the switching of the feedback signals by the switching means 5. The holding of the control signal by the holding means 8 is released after the switching by the switching means 5 is completed.
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Inventors:
Mitsuo Sakai
Kazuyuki Harada
Kazuyuki Harada
Application Number:
JP18877296A
Publication Date:
August 16, 2006
Filing Date:
June 28, 1996
Export Citation:
Assignee:
Hokko Industry Co., Ltd.
International Classes:
F15B9/09; G05B7/02; F15B11/028; (IPC1-7): F15B9/09; G05B7/02
Domestic Patent References:
| JP3065701A | ||||
| JP61143802A | ||||
| JP63103302A | ||||
| JP54095877A | ||||
| JP2085504A | ||||
| JP60032621A | ||||
| JP58048418U |