JPS5499884A - Variafble sample period controller - Google Patents
Variafble sample period controllerInfo
- 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
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
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)
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 |
-
1978
- 1978-01-24 JP JP576678A patent/JPS5919362B2/en not_active Expired
Cited By (6)
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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