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Patent Searching and Data


Title:
HYDRAULIC EXCITING MACHINE
Document Type and Number:
Japanese Patent JP2000301067
Kind Code:
A
Abstract:

To make it possible to embody the more excellent reproducibility of exciting waveforms by compensating the change in the dynamic characteristics of a hydraulic cylinder which is the exciting source of a hydraulic exciting machine.

The hydraulic exciting machine has the hydraulic cylinder 40 which is operated by the hydraulic fluid supplied from a hydraulic source 1, a servo valve 5 which controls the supply of the hydraulic fluid to the hydraulic cylinder 40 and a controller which outputs the control signal 10a based on an excitation signal 7 from outside to the servo valve as basic constitution. The machine has a speed detecting means 12 for detecting the moving speed of a piston 3 in the hydraulic cylinder and a displacement detecting means 8b for detecting the displacement of the piston. Further, the machine has a linearization compensator for linearizing the dynamic characteristics of the hydraulic cylinder 40 by processing the control signal to the servo valve 5 outputted from the controller between the controller and the servo valve 5 in accordance with the output of the speed detecting means and the output of the displacement detecting means.


Inventors:
Horiuchi, Toshihiko
Hirai, Hirotake
Konno, Takao
Sugamata, Yoshihiko
Application Number:
JP1999000113952
Publication Date:
October 31, 2000
Filing Date:
April 21, 1999
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
B06B1/18; F15B9/09; G05B11/36; G05D19/02; (IPC1-7): B06B1/18; F15B9/09; G05B11/36; G05D19/02
Attorney, Agent or Firm:
高崎 芳紘