Nyquist App vs CloudLabs Geometric optics

In this app, you can practice the Nyquist stability criterion. With the Nyquist stability criterion, you can determine the stability of the closed loop based on the frequency response of the open loop, without explicitly calculating the poles of the closed loop. This app was developed at the Institute for Systems Theory and Automatic Control of the University of Stuttgart and accompanies the course "Einführung in die Regelungstechnik" at the University of Stuttgart. Nevertheless, the content and tasks are self-contained, and we encourage all interested in this topic to play with the app and practice the Nyquist stability criterion.

In this free practice, a table is available for the study of geometric optics, where it is possible to select and use lenses, mirrors, light sources, test objects, and filters, among other instruments, whose position and angle can be adjusted. The images formed by the objects can be visualized through an electronic eye and the optical phenomena, through an electronic screen.