Abstract
An adaptive controller was applied to mould level control for continuous steel slab casting. The controller is embedded within a PC-based real-time control program, named RTS. The work is the outgrowth of adaptive LQ designs which have been applied since 1981; a multivariable version of the adaptive controller is embedded within Connoisseur, a larger control system. Control of mould level for continuous steel slab casting involves a process whose model contains an integrator and oscillatory terms, noise and non-linearities, while the excitation of the actuation is poor. The combination is potentially devastating for adaptive controllers. The RTS controller incorporates filters, noise models and other techniques to deal with these problems. The on-line experiments offered insights into appropriate methodologies requiring interesting techniques for non-invasive monitoring and changeover from one controller to another so as not to affect normal production.
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