control loop example - mks 2€¦ · 5.march 2004 epics pid seminar 1 control loop example liquid...
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![Page 1: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/1.jpg)
5.March 2004 EPICS PID Seminar 1
Control Loop Example
Liquid Helium
Helium Vessel Liquid Helium Supply
FVF
Exercise:Control the flow (F) with the valve VF independant of Helium level (L)
HeliumLevel (L)
VP
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5.March 2004 EPICS PID Seminar 2
Control Loop ExampleThe Solution
Available input data:-Level (L)-Flow (F)-Valve Position (VP)
Liquid Helium
Helium Vessel
Liquid Helium Supply
FVFHelium
Level (L)
VP Available control device:-Valve (VF)Control Algorithm:-Desired flow depends on:-Valve position-Flow resistance in tube (Rt=F(L))-Helium level (L)Result:VP = f (Fdesired=f(Rt, L) )
![Page 3: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/3.jpg)
5.March 2004 EPICS PID Seminar 3
Control Loop ExampleThe Real Solution
Available input data:-Flow (F)
Liquid Helium
Helium Vessel
Liquid Helium Supply
FVFHeliumLevel
Available control device:-Valve (VF)Control Algorithm:-PID
-Control Value (F)-Output Value (VF) (0-100%)
-(the actual real position of the valve does not matter)End Switches might be used to check for min/max values (anyhow ‚known‘ by control system)
PID
Setpoint
![Page 4: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/4.jpg)
5.March 2004 EPICS PID Seminar 4
Control Loops implemented in EPICS
AI
PID
OUT
4 – 20mA
4 – 20mA
V0 – 20 g/s
0 – 100 %
![Page 5: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/5.jpg)
5.March 2004 EPICS PID Seminar 5
![Page 6: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/6.jpg)
5.March 2004 EPICS PID Seminar 6
Control Loops implemented in EPICS
AI
PID
OUT
0 – 100%
0 – 100%
0 – 100%
0 – 100 %
CALCA
![Page 7: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/7.jpg)
5.March 2004 EPICS PID Seminar 7
Control Loops implemented in EPICS
AI
PID
OUT
0 – 100%
0 – 100%
0 – 100%
0 – 100 %
CALCA+B
CALCRAMP
![Page 8: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/8.jpg)
5.March 2004 EPICS PID Seminar 8
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5.March 2004 EPICS PID Seminar 9
Two PID one Output
![Page 10: Control Loop Example - MKS 2€¦ · 5.March 2004 EPICS PID Seminar 1 Control Loop Example Liquid Helium Helium Vessel Liquid Helium Supply F VF Exercise: Control the flow (F) with](https://reader030.vdocument.in/reader030/viewer/2022020412/5af9bd647f8b9aac248ed382/html5/thumbnails/10.jpg)
5.March 2004 EPICS PID Seminar 10
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5.March 2004 EPICS PID Seminar 11
Control Loop Example
Magnet
1 phase
2phase L
Vfill
VJT
4.5K 4bar
4.2K 4bar
4.2K 1bar
4.3K 4barLevel (L) can be controlled by:HeaterJT ValveFill Valve