Understanding Valve Flow Characteristics
20 min
Intermediate
Article / Blog
Application
The response of flow rate through a control valve depends on the friction losses in the piping in which it is installed as well as the controller signal. The installed characteristic (a...
See More
Decoding a Laplace Representation of a Controller
20 min
Intermediate
Article / Blog
Application
A how to relate the Laplace notation to the PID controller variation and features
See More
The Linear Quadratic Regulator (LQR)
Intermediate
Article / Blog
Theory
Lecture notes for ECE717 on LQR control by Laurent Lessard. There is a section that shows how the Algebraic Riccati Equation is part of the LQR solution by "completing the square".
See More
Adaptive Control (Part I) — Hypersonics and the MIT Rule
Intermediate
Article / Blog
Theory
This blog post introduces the algorithm that ruled the adaptive flight control system of the first manned hypersonic aircraft, the North American X-15.
See More
Use First-Principles Modeling to Get FOPDT Coefficient Values
30 min
Intermediate
Article / Blog
Application
Conventionally, we obtain model coefficient values by open-loop step-testing of the process; but this creates undesirable process upsets, and only reveals the local process behavior. This...
See More
Integral Wind-Up and Solution
Intermediate
Article / Blog
Application
What is integral wind-up and how velocity mode solves it.
See More
MATLAB Command: lqr
Intermediate
Article / Blog
Application
MATLAB command documentation for the Linear-Quadratic Regulator (lqr) function.
See More
What Is Online Estimation?
Beginner
Article / Blog
Theory
This Mathworks document describes online estimation. Online estimation algorithms estimate the parameters and states of a model when new data is available during the operation of the...
See More
MATLAB Discovery Page - Visual Inspection
Beginner
Article / Blog
Theory
Visual inspection is the image-based inspection of parts where a camera scans the part under test for both failures and quality defects. Automated inspection and defect detection are...
See More
Min IAE Tuning
15 min
Intermediate
Article / Blog
Application
Procedure and Commentary on tuning for minimum Integral of the Absolute Error
See More
Lectures on Modelling and Control of Dynamic Systems (French)
Beginner
Article / Blog
Theory
Lectures on Modelling and Control of Dynamic Systems from Patrick Lanusse of Bordeaux INP, France.
See More
Online Tuning using Simulink’s Closed-Loop PID Autotuner Block
30 min
Intermediate
Article / Blog
Application
Learn how to conduct an online tuning of a PI-speed controller using the MATLAB/Simulink Closed-Loop PID Autotuner Block. Tuned controller is validated on a Quanser QLabs Virtual QUBE-Servo...
See More
Process Control is Inventory Control
10 min
Beginner
Article / Blog
Application
You change the inventory of heat to change temperature. You change the inventory of material to change level. Understanding how the inventory relates to the controlled variable is...
See More
PID Explained
20 min
Beginner
Article / Blog
Theory
A qualitative explanation of P, I, & D actions using graphs.
See More
Mathworks Model Reference Adaptive Control Overview
Beginner
Article / Blog
Theory
This website provides an overview of the mathematics behind Model Reference Adaptive Control (MRAC). MRAC is a model-based, real-time adaptive control algorithm that computes control actions...
See More
MATLAB Command: goodnessOfFit
Intermediate
Article / Blog
Application
Goodness of fit between test and reference data for analysis and validation of identified models
See More
PID Controller Variations
20 min
Intermediate
Article / Blog
Application
It is important to understand the variations on the PID algorithm when tuning and when choosing a version that is consistent within your use context. Unfortunately, there are many names for...
See More
Bumpless Transfer and Tuning
15 min
Intermediate
Article / Blog
Application
Switching from MAN to AUTO mode or LOCAL to CASCADE or changing the controller integral time should not cause a change in the controller output, a bump. But a primitive coding of the PID...
See More
A Statistical Noise Filter
20 min
Intermediate
Article / Blog
Application
A noise filter that uses Statistical Process Control (SPC) techniques to temper tampering
See More
Post-Pandemic: A Hybrid Lab Experience
Beginner
Article / Blog
Application
This article discusses the importance of a hybrid laboratory model, blending physical hardware with digital twins. Example using the Quanser Interactive Lab (QLabs) platform is given.
See More
What are Polynomial Models?
Intermediate
Article / Blog
Theory
This Mathworks page provides an overview of polynomial models.
See More
Cohen-Coon Tuning
15 min
Intermediate
Article / Blog
Application
A procedure and commentary on this tuning approach that includes deadtime.
See More
Cascade Control 2
Intermediate
Article / Blog
Application
An Implementation Recipe for Cascade Control
See More
Nyquist Stability Criterion
15 min
Beginner
Article / Blog
Theory
The Wikipedia article on Nyquist Stability Criterion. This covers the Nyquist plot, the Cauchy argument principle, and the stability criterion itself. A mathematical derivation is also...
See More
Tuning PID Controllers
20 min
Intermediate
Article / Blog
Application
Tuning controllers is the procedure for choosing the coefficient values for the P, I and D modes. It must be simple to execute, fast, and non-disruptive to the operating process. Heuristic...
See More