Explore, model, simulate, and analyze dynamic control systems in our simulator.

See the effect of pole location in continuous and discrete time domains at the same time.

Basic Info

This portal provides a number of interactive examples focused on control system theory. Crafted by researchers focused on controls of electromechanical systems, the intent is to help students and engineers "connect the dots" by showing the relationships between the frequency and time domains and to elucidate some of the more abstract control theory analysis and design concepts.

What is here?

1) A series of articles focused on control system theory are to be found here.

2) A web-based simulator suited to test out concepts right away without MatLab/Simulink installed on your machine.

3) Bode Plot Engine, a computing and plotting environment with combined symbolic and numerical inputs.

4) Many other articles focused on power electronics, motor control, and instrumentation.

This site is viewed complementary to other websites focused on control theory- because those do not have interactive elements deemed crucial to understanding the nuances of analysis and design techniques.

MatLab(©) Compatibility

Crucial interactive demos are complemented by MatLab(©) code examples that allow the reader to readily port script to a standalone MatLab(©) application. All examples were extensively tested for 1:1 match with MatLab.

Video Introduction

The following YouTube video highlights some of the interactive features found on this portal.

It is all sine waves.

Introduction to dynamic systems.

Learn to use the online interactive scope.

In MatLab, DSPs, and FPGAs.

The fundamentals of signal flow.

Introduction to dynamic systems.

Bode plots of low/high-pass filters, PI controller, lead/lag filters and build-your-own.

Learn about the path from the analog domain to the discrete-time domain.

The ubiquitous PI Controller explained.

Introduction to Lead and Lag compensators. Bode plot characteristics and simulation.

Natural frequency, damping factor, pole locations, time-domain waveforms.

What is the effect of feedback-path filtering on controller design?

How can one approximate IIR systems with FIR systems?

Explore the discretization process of the most common IIR filter.

Calculate the final output of any transfer function. Really any transfer function?

Not all switches are made equal.

Let's discharge caps with resistors. Demo included.

Learn about the three-phase to two-phase transformation.

Notes on the Nyquist Stability Criterion by Prof. David Torrey.

This article by Prof. David Torrey focuses on fundamental components.

This article by Prof. David Torrey focuses on analysis techniques.

**Recent Updates:**

*04/30/19*

First-Order Low-Pass Filter Discretization corrections

*04/13/19*

Web-Based Simulator now contains pulse generation block.

*02/20/19*

Supplementary Notes on Circuit Analysis, Pt. 2 by Prof. David Torrey

*02/10/19*

Supplementary Notes on Circuit Analysis, Pt. 1 by Prof. David Torrey

*01/24/19*

Notes on the Nyquist Stability Criterion by Prof. David Torrey

*08/15/18*

Transformations for Motor Drive Design - Clarke

*08/05/18*

Web-based Simulator: the number of available scope signals has been increased to 5. Sine block now supports phase offset.

*07/15/18*

Bode Plot Engine - it is now possible to numerically evaluate symbolic variables.

*06/10/18*

Switching Losses & Simple 3-Dimensional Plotting plotting bugs fixed.

*06/03/18*

Bode Plot Engine - it is now possible to download magnitude and phase plots as .png files.

*05/21/18*

The www.controlsystemsacademy.org domain is now linked to this portal.

*05/06/18*

Bode Plot Engine - it is now possible to download frequency domain data as a .csv file.

*04/22/18*

Web-based Simulator: each scope block can now have a custom name.

*04/20/18*

Capacitor / Resistor Discharge Circuit : Theory + Demo

*04/15/18*

Bode Plot Engine - scripts can now be shared via page URL

*04/10/18*

Switching Losses & Simple 3-Dimensional Plotting

*04/01/18*

The integration block in Web-Based Simulator now supports initial condition.

*03/20/18*

Added a video introduction to some of the interactive features.

*02/27/18*

Fixed Documentation links on the Web-Based Simulator page.

*02/04/18*

Final Value Theorem

*01/29/18*

Bode Plot Engine - scientific notation enabled.

*01/09/18*

Bode Plot Engine

*01/08/18*

Bode Plot Engine Documentation

*01/07/18*

Web-based Simulator Documentation

*01/05/18*

IIR to FIR System Conversion

*12/18/17*

Feedback-path Filtering

*11/21/17*

2nd-order System Dynamics

*11/19/17*

Web-based Simulator now detects algebraic loops.

*11/06/17*

Lead / Lag Compensators : Introduction, Characteristics, Simulation

*10/30/17*

Interactive Pole-Zero Placement w/ Filter and Controller Examples and Bode Plots

*10/18/17*

Proportional-Integral (PI) Controller : Theory + Demo

*10/09/17*

Digital Control Loops

*10/05/17*

Time Domain Scope Feature

*10/02/17*

Proportional Controller: Theory and Demo

*10/01/17*

System Dynamics - Time Constants

*09/28/17*

Web-based Simulator

*08/16/17*

Textbooks and Journals for Power Electronics and Motor Controls

*07/25/17*

Control System Block Diagram

*07/24/17*

Transfer Function Stability - Interesting Facts About Polynomial Form

*07/23/17*

System Modeling With Transfer Functions

*07/20/17*

Proportional Controller Implementation

*07/10/17*

Relationship Between S/Z Planes and Time Domain

*06/30/17*

Interactive Fourier Series Demo

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