Title:
SERVO DEVICE
Document Type and Number:
Japanese Patent JPS6467604
Kind Code:
A
Abstract:
PURPOSE:To realize the dynamic change of a servo constant by using a programmable gain amplifier to an analog servo device and using a D/A converter to form said programmable amplifier. CONSTITUTION:The target value undergone the D/A conversion 3 is supplied to one of both inputs of an analog subtractor 4. While the observed value received from a controlled system 5 is supplied to the other input of the subtractor 4. The deviation between the target value and the observed value is outputted to the programmable gain amplifiers 6 and 7 consisting of the D/A converters respectively. The output of the amplifier 6 is supplied to one of both inputs of an analog adder 8; while the output of the amplifier 7 is differentiated by a differentiator 9 and supplied to the other input of the adder 8. Then the added value of both outputs of amplifiers 6 and 7 is applied to the controlled system 5 as the controlled variable. With use of such amplifiers 6 and 7, the gain and then a servo constant can be changed without substantially applying the load to software since the gain is set just by writing the digital value to the D/A converter. Thus the servo constant can be dynamically changed.
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Inventors:
MIZOGUCHI HIROSHI
Application Number:
JP22550687A
Publication Date:
March 14, 1989
Filing Date:
September 09, 1987
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G05D3/12; B25J13/08; G05B13/00; G05B13/02; (IPC1-7): B25J13/08; G05B13/00; G05D3/12
Attorney, Agent or Firm:
Takehiko Suzue (2 outside)