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Title:
METHOD FOR CONTROLLING FLOW RATE OF PIPE
Document Type and Number:
Japanese Patent JPH10177417
Kind Code:
A
Abstract:

To attain stable water level control by relaxing the secondary influence on the fluctuation of the water level of a pressure reduction well generated due to the movement of a control valve at a downstream side.

A main opening degree M1 is calculated by a PID arithmetic operation by using a water level signal in a pressure reduction well 5a to be controlled as an input value, and a correction opening degree M2 is calculated by the PID arithmetic operation by using a water level signal in a pressure reduction well 5b positioned at a very upstream side as an input value. Then, the product of a correction weighting factor n2 preliminarily calculated by a rule of thumb and the correction opening degree M2 is added to the product of a main weighting factor n1 preliminarily calculated by a rule of thumb and the main opening degree M1, and an operational target opening degree Mo of a control valve 7a is calculated.


Inventors:
KIMURA AKIO
Application Number:
JP33881596A
Publication Date:
June 30, 1998
Filing Date:
December 19, 1996
Export Citation:
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Assignee:
KUBOTA KK
International Classes:
G05D7/06; G05D9/12; (IPC1-7): G05D7/06; G05D9/12
Attorney, Agent or Firm:
Yoshihiro Morimoto