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rtint-gui: Desktop GUI for Real-Time Control A desktop application to acquire signals, identify plant dynamics and design feedback control on a real-time target.
Software
Control
Active 2026-09-01 https://gitlab.esrf.fr/dehaeze/real-time-interface-gui https://dehaeze.gitlab-pages.esrf.fr/real-time-interface-gui/ https://pypi.org/project/rtint-gui/

Overview

rtint-gui is a desktop application for working with a real-time target that runs a Resyst server. It is built on top of [rtint]({{< relref "real-time-interface" >}}), which handles the communication with the target, and follows the usual steps of a control task:

  1. Connect to a running server.
  2. Acquire signals from the target.
  3. Analyse the records as time traces and spectra (PSD / ASD).
  4. Identify the plant dynamics by measuring frequency responses.
  5. Design feedback control from the identified dynamics.

Each step is a page of the application.

Pages

  • Signal Analysis: choose counters and model signals, set a duration, watch the acquisition live, then compute power spectra with configurable window, overlap and averaging.
  • Dynamical Identification: excite the plant with a generator and estimate its frequency response (Bode plot, coherence, and an RGA plot for multi-input multi-output systems). Open-loop and closed-loop identification are supported.
  • Transfer Function Analysis: overlay measured responses with the Bode plots of the filters running on the target, and with their products.
  • Feedback Control Design: from an identified plant and the filters used as controller, compute characteristic loci, sensitivity and complementary sensitivity, the modulus margin and a Nyquist stability verdict.
  • Filters, motors, EtherCAT, parameters and more: inspect and edit what the real-time model exposes.

Results are saved as MATLAB .mat files, so they can be reopened in MATLAB or Python. The analysis pages also work offline on previously saved data, without a target.

Installation

pipx install rtint-gui     # or: uv tool install rtint-gui
rtint-gui

Python 3.12 or 3.13 is required. The interface uses PySide6 and pyqtgraph. Running rtint-gui --offline starts it without a real-time target.

The documentation has a guide for each page and a description of the .mat file format.

  • [rtint]({{< relref "real-time-interface" >}}): the Python package this application is built on.