JPS5499884A - Variafble sample period controller - Google Patents

Variafble sample period controller

Info

Publication number
JPS5499884A
JPS5499884A JP576678A JP576678A JPS5499884A JP S5499884 A JPS5499884 A JP S5499884A JP 576678 A JP576678 A JP 576678A JP 576678 A JP576678 A JP 576678A JP S5499884 A JPS5499884 A JP S5499884A
Authority
JP
Japan
Prior art keywords
composition
flow rate
sample period
multiplier
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP576678A
Other languages
Japanese (ja)
Other versions
JPS5919362B2 (en
Inventor
Kazuo Hiroi
Tetsuo Ai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP576678A priority Critical patent/JPS5919362B2/en
Publication of JPS5499884A publication Critical patent/JPS5499884A/en
Publication of JPS5919362B2 publication Critical patent/JPS5919362B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To perform sure sample control, by altering the sample period depending on the variation in the dead time due to that in the physical quantity of a controlled system.
CONSTITUTION: A signal produced by multiplying the flow rate signal of a fluid A of a flow rate transmitter 12 by a ratio α is applied to a multiplier 20. The output of the multiplier 20 is applied as a set flow rate of a fluid B to a flow rate controller 21. A composition controller 23 employing a sampling control method compares the composition of a fluid C measured by a composition transmitter 22 with a composition setpoint and supplies its output to the multiplier 20. A time taken for the integrated value of the controlled variable to become a physical quantity extending from a control point to a process variable detection point or a vlaue obtained by adding the time constant of the process to a time obtained by integrating the controlled variable with the dead time determined by the controlled variable is applied as a sample period to the composition controller 23 by a variable sample period control unit 24.
COPYRIGHT: (C)1979,JPO&Japio
JP576678A 1978-01-24 1978-01-24 Variable sample period controller Expired JPS5919362B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP576678A JPS5919362B2 (en) 1978-01-24 1978-01-24 Variable sample period controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP576678A JPS5919362B2 (en) 1978-01-24 1978-01-24 Variable sample period controller

Publications (2)

Publication Number Publication Date
JPS5499884A true JPS5499884A (en) 1979-08-07
JPS5919362B2 JPS5919362B2 (en) 1984-05-04

Family

ID=11620237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP576678A Expired JPS5919362B2 (en) 1978-01-24 1978-01-24 Variable sample period controller

Country Status (1)

Country Link
JP (1) JPS5919362B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790707A (en) * 1980-11-26 1982-06-05 Mitsuwa Seiki Co Ltd Digital control method
JPS59180702A (en) * 1983-03-31 1984-10-13 Toshiba Corp Process controlling method
JPS61224982A (en) * 1985-03-29 1986-10-06 Hitachi Ltd Method of controlling ph of culture tank
JPH02183302A (en) * 1989-01-10 1990-07-17 Yokogawa Electric Corp Fuzzy control method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790707A (en) * 1980-11-26 1982-06-05 Mitsuwa Seiki Co Ltd Digital control method
JPH0320763B2 (en) * 1980-11-26 1991-03-20 Sanwa Seiki Mfg Co Ltd
JPS59180702A (en) * 1983-03-31 1984-10-13 Toshiba Corp Process controlling method
JPS61224982A (en) * 1985-03-29 1986-10-06 Hitachi Ltd Method of controlling ph of culture tank
JPH0367668B2 (en) * 1985-03-29 1991-10-23 Hitachi Ltd
JPH02183302A (en) * 1989-01-10 1990-07-17 Yokogawa Electric Corp Fuzzy control method

Also Published As

Publication number Publication date
JPS5919362B2 (en) 1984-05-04

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