Metallurgy
| PROCESSES | Control implementations |
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| Cold rolling mill | Thickness control (6) Bending control (2) |
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| Hot rolling mill | Thickness control (2) Inter-stand tension control (2) Flatness control (1) Coil temperature control (1) |
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| Strip accumulator |
Régulation niveau lingotière (2)
Régulation de poids en distributeur (2)
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| Continuous casting |
Mould level control (2)
Tundish weight control (2)
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| Heat treatment furnace | Temperature control (3) | |
| Cutting | Strip (1) |
Download :
Typical example : Control of hot rolling mills
Requirements :
Controlled variables :
- Output thickness (measured)
- Inter-stand tensions (measured)
- Flatness (through a measured criteria)
- Coil temperature (measured)
Actuators :
- Hydraulic (fast) / Screw (slow) roll gap settings
- Motors speed
Constraints on :
- Actuators
- Internal variables (rolling forces, motor currents …)
Multivariable system with constraints requires advanced control
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Results :
Thickness performances :
Rolling mill operating :
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