Web application to the simplest robust controller design

The paper discusses online course materials used in the training for the simplest robust controller. It has been proposed for the plant that can be represented by simple gain and dead time. The controller design is realized by choosing appropriate model parameters and and by specifying the disturbance observer filter characterized by its order and by the time constant. All parameters have to be estimated in such a way that the loop will offer the fastest possible dynamics of the set-point and disturbance responses in a considered range of the plant parameter values. In order to help practitioners, engineers or other interested users to set the controller parameters optimally, a web application has been created. The interactive design procedure is required to see impact of an estimate of the uncertainty intervals for the dominant uncertain plant parameter on the controller parameter values. The user can e.g. choose the order of considered filters and then, by using slider, the analyzed plant parameter (gain or dead time) and to see the consequence of this choice (measured e.g. by integral criteria). This approach enables to better understand the controller influence on the loop performance.