Controllio
Controllio is a web app which lets Control Systems engineers design & experiment with LTI (linear time-invariant) dynamical systems online.
So far, functionality has been implemented for:
- the analytical computation of the overall transfer function (tf) of a system modeled by interconnected elements in the s-domain
- the generation of its Bode and Nyquist plots
- the numerical computation of its time response plot
- the numerical computation of its zeros/poles & some characteristic numbers, ex. bandwidth
- the numerical computation of its stability
This is a web GUI tool. For a command-line one, check the lti-freq-domain-toolbox
Motivation
The motivation behind Controllio is to create an open-source tool for studying Control Systems, which:
- runs on the browser without any installation, is fast and mobile-friendly
- is written in a widely-used programming language (vanilla Javascript), and can be easily extended
Technical details
Circuit simplification
- A set of 6 simplication algorithms to compute analytically its overall transfer function
Numerical algorithms
- Polynomial complex roots: Weierstrass / Durand-Kerner algorithm
- Laplace inversion: Talbot algorithm
Topology optimization
- A stochastic algorithm to simplify the circuit's topology
Ready-made components
- Utilities: integrator / step, exponential decay, sine, phase delay
- Controllers: PI, PD, PID
Try it out
Online
- The app is deployed here
Locally
- Download the repo, and just load the app using a development server
User Guide
A User Guide is included in the web app, and can be launched from the main menu
Code Structure
The project uses a simplified variation of the MVC pattern, organizing code into model and view parts:
\model\contains all code modeling the circuit elements, state & functionality:- the definitions of the main circuit elements (tf, adder, block), as JS classes
- the circuit/block simplification algorithms' logic
- the services related to the circuit state & core functionality (ex. elementConnectionService)
\view\contains all code related to the visual part of the app & its UI:- the views of the main circuit elements (ex. tfView) & all other UI components (ex. navbarView)
- the core rendering & UI services (ex. elementRenderingService, elementSelectingAndDraggingService)
- the app features' services (ex. optimizeTopologyService)
- the animations' rendering code
- the plot computations & rendering code
- the CSS styles
In addition:
\assets\contains any other resources used (ex. libraries, images)\math\contains the math services (ex. complexAnalysisService)\test\contains the services' tests (ex. plotsTests), which can be executed from the main JS file script.js\util\contains any general-purpose utility code & services (ex. loggingService)
License
Controllio is distributed under the MIT License, included in the 'LICENCE.TXT' file. Copyright (C) 2023 Ioannis Stefanis