openQsyn

A modern open source toolbox for QFT control synthesis

Official website: https://qsyn.github.io/

Quantitative Feedback Theory (QFT) is a frequency domain robust control design technique, introduced by Isaac Horowitz. If you were looking for Quantum Field Theory you are in the wrong place!

The goal of this project is to provide a modern and completely free open source toolbox to aid QFT control synthesis. It will replace the very capable, yet obsolete, Qsyn toolbox, developed by Prof. Per-Olof Gutman in the 90s. The development is supported by Prof. Gutman himself, and all reused code is done with his premission.

openQsyn is distributed under GNU LGPLv3 license without any warranty.

How to use

Installing the Toolbox (non Git users)

1. Download the zip.
2. Unzip into a new folder named e.g. openQsyn
3. Add openQsyn to your Matlab path
4. Run oqsyn_ini to initiate the toolbox

Installation via Git

1. Create a folder named e.g openQsyn and open git bash
2. Clone the repo by typing: git clone https://github.com/rubindan/openQsyn.git
3. Add openQsyn to your Matlab path
4. Run oqsyn_ini to initiate the toolbox

Demo

A quick introductory example is provided by the live script example.mlx. This exmaple will guide you through the steps of SISO design: definning a new plant and design specifications, computaing templates and bounds, designing a feedback compensator and a pre-filter.

Documentation

Open Qsyn uses Matlab based documentation, thus viewd using standard Matlab help and doc commands.

• General documentation is accsessed by typing help <folderName>, with <folderName> Open Qsyn installation folder.
• Documentation for a functions is viewd by typing help <functionName>.
• Documentation for a class is viewed by typing help <className>.
• Documentation for a method is viewed by typing help <className/methodName>.

Status

Open Qsyn toolbox is under construction, but it can already be used for SISO QFT design for plants with parametric uncertainty, unstructuerd uncertainty, and uncertain delay. Feel free to open issues in order to report bugs or suggests new features. Just check the issues section and the below to-do list first :).

The toolbox is regulary tested on Matlab 2015b,2017a,2017b. For complete functionality the Control Systems Toolbox is required.

To-Do list:

• import/export from\to Robust Control Toolbox
• cascade design support
• MIMO design support

Contact

rubindan115 at gmail dot com