Title:
HYDRAULIC OUTPUT CONTROLLER IN AGRICULTURAL WORKING MACHINE OR THE LIKE
Document Type and Number:
Japanese Patent JP3273109
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for carrying out feed back control so as not to cause control error by change in temperature when lifting and lowering control of reaping pretreating apparatus in a general purpose combine is carried out by plural kinds of detected values.
CONSTITUTION: A compensating element 78 in which output signal value is changed by the change in temperature and an amplifier 67 are serially connected to a D/A converter 76 for converting a digital output order signal Xd(i) obtained from plural detected values every a definite time interval into an analog signal Xa(i) and outputting the signal, and a proportional control valve 68 is operated according to the output signal from the amplifier 67 to drive a hydraulic cylinder. A deviation Hi which is the difference between the digital output order signal Xd(i) which is outputted before every a definite time interval and a feed back signal Fd(i) obtained through the A/D converter 81 from the analog signal Xa(i) output value outputted from the compensating element 78 is operated and a value Xd' obtained by adding the deviation Hi to the newest digital output order signal XdI+1) is inputted to the D/A converter 76.
Inventors:
Ritsuko Kajio
Wataru Nakagawa
Hiroshi Kawabuchi
Wataru Nakagawa
Hiroshi Kawabuchi
Application Number:
JP25850394A
Publication Date:
April 08, 2002
Filing Date:
October 24, 1994
Export Citation:
Assignee:
Yanmar Agricultural Machinery Co., Ltd.
International Classes:
A01D41/12; A01B63/10; A01D34/24; A01D67/00; A01D69/03; F15B9/09; F15C1/06; G05B11/36; (IPC1-7): A01D69/03; A01B63/10; A01D34/24; A01D41/12; A01D67/00; F15B9/09
Domestic Patent References:
| JP367502A | ||||
| JP2119705A | ||||
| JP351589A | ||||
| JP631405U | ||||
| JP631406U | ||||
| JP4136301U |
Attorney, Agent or Firm:
Akio Ishii (2 outside)
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