Robust control of quadruple-tank process via LMI

Several methods for robust state-feedback controller design via LMI are studied and implemented on a quadruple tank process model. Qualities of the respective LMI solutions are compared and discussed. MIMO controller is designed for uncertain linearized model of quadruple tank process, using LMI approach, guaranteeing quadratic stability, H
₂
and H
_inf
performance specification. The results obtained using LMI and SeDuMi solvers are compared.