The Nyquist App for Android and iPhone

In our Nyquist App, you can analyze the stability of the closed loop by using 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.

The Nyquist App is available in your Android and Apple App Store, respectively.

Nyquist App Terms of Use and Privacy Policy

We, the Institute for Systems Theory and Automatic Control of the University Stuttgart (IST) are glad that you are interested in our app "Nyquist App" (in the following only referred to as app). These terms of use are the agreements between you and us for the purpose of using this app. The privacy policy discusses how your personal data will be collected and processed while using this app. By agreeing to these terms, you accept all listed agreements and confirm, that you took note of all references.

0. Language Notice

Only the German version of the terms of use and privacy policy are legally binding, this English version is just an orientation for people that don't speak German.

1. Terms of Use

1.1 Usage
Using this app is exclusively permissible under the conditions of this terms of use.

1.2 Contact
The given contact address must not be used for abusive reasons, such as sending ads or any other spam.

1.3 Data Protection
We process your personal data as described in the privacy policy.

2. Privacy Policy

2.1 Access Rights
To provide complete functionality the app needs no access right.

2.2 Personal Data
In this chapter we describe how we collect and process your personal data. No personal data is collected and processed by us.

3. Update Notice

These terms of use and this privacy policy may change from time to time. The most current versions can be found on

4. Impressum

Universität Stuttgart
Keplerstraße 7
70174 Stuttgart
Phone: ++49 (0)711/6858-0
Fax: ++49 (0)711/6858-2113
Responsible party: The University of Stuttgart is a public sector entity.
It is legally represented by the Rector, Prof. Dr.-Ing. Dr. h. c. Wolfram Ressel,
VAT ID No.: Pursuant to §27 a Value Added Tax Act: DE 1477 94 196

Institute for Systems Theory and Automatic Control
Pfaffenwaldring 9
70569 Stuttgart
Phone: ++49 (0)711 685-67734
Fax: ++49 (0)711 685-67735

5. Copyright Notice

Please note that all texts, pictures and graphics as well as their arrangements - unless otherwise stated - have been created by the IST itself and are subject to copyright protection. For example, they may not be copied, modified or used on other websites. We hereby agree to the use of generally accessible texts by third parties - even in parts - only on the condition that the IST is named as the author. The use of other content, such as images and graphics, is not permitted. However, if you are interested in a legal right of use, please contact the above contact/address.

Date: 14.01.2019

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