Web Application for the Analysis of One Type of Disturbance Observer Based PI Control by the Performance Portrait Method

One type of the disturbance observer (DO) based controller has been proposed by extending the traditional PI control loop for a velocity servo control by DO for reconstruction and compensation of input disturbances. This solution has significantly improved the disturbance response and attracted attention of many subsequent papers. On the other hand, the structure has led to problems that have limited achievable improvements of transients. Thus, this structure takes a unique position in understanding features of the DO based control and in all associated courses. The application should yield open access to an interactive analysis of such a solution by the performance portrait method and to its comparison with another possible modification of the DO based filtered PI control.