Frequency-domain robust control toolbox

A new frequency-domain robust control toolbox is introduced and compared with the robust control toolbox of Matlab. A summary of the theoretical background for H_∞ controller design using the spectral models is given. The main advantage of this toolbox is that almost all types of model uncertainties like unmodelled dynamics, multimodel uncertainty, spectral uncertainty and parametric uncertainty can be taken into account without conservatism. As a result, the uncertain parametric or frequency-domain models identified by the identification toolbox of Matlab can be used directly for computing robust controllers. The main commands of the new toolbox are briefly explained and the performance of the designed controllers are illustrated via some sand experimental results.