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Feedforward Control

Doug Cooper & Allen Houtz
Intermediate
Article / Blog
Application

When a Ratio Control strategy takes action too soon, use Feedforward to temper the dynamics.  When a disturbance can be measured, but would not be a ratio of the control output use...

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Min IAE Tuning

Jacques Smuts
15 min
Intermediate
Article / Blog
Application

Procedure and Commentary on tuning for minimum Integral of the Absolute Error

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MATLAB Command: resid

Mathworks
Intermediate
Article / Blog
Application

This MATLAB command is part of the system identification toolbox and provides a way to compute and test residuals.

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Understanding Valve Flow Characteristics

R. Russell Rhinehart
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...

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Averaging Methods in Nonlinear Dynamical Systems

Jan A. Sanders, Ferdinand Verhulst, James Murdock
Intermediate
Book
Theory

Perturbation theory and in particular normal form theory has shown strong growth during the last decades. So it is not surprising that the authors have presented an extensive revision of the...

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Linear Regression 2 [Python]

Steve Brunton
5 min
Intermediate
Video
Application

This video describes how the singular value decomposition (SVD) can be used for linear regression in Python (part 2).

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Gimbal Lock in reference to the Apollo missions

The Vintage Space
4 min
Intermediate
Video
Theory

A gimbal is a pivoted support that permits rotation of an object about an axis. For this reason, a set of three axes gimbals are used in spacecrafts to help with orientation attitude control...

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