S5 – Integrated thickness and flatness control

Initial situation:

• The regulations of the strip thickness and the strip planarity influence each other.
• The planarity controller is artificially slowed down to reduce the band thickness disturbances

Working topics:

• Development of an integrated control concept for thickness and flatness control
• Development of an online plant model, Planeness and band thickness model validation
• Implementation of the scheme

Results:

• Planarity actuators operate at maximum speed, fast adjustment of planarity errors
• No undesirable cross-connections between flatness and thickness adjusters
• Lower thickness deviation over belt length
• High acceptance by the operator
• New regulation runs stable and reliable