# Special Vintage: Differential Equation Editor1

Posted by Guy Rouleau,

This week I feel like an archaeologist who just dug out a new species of dinosaur! I discovered the Differential Equation Editor...... read more >>

Posted by Guy Rouleau,

I am recently visited the MathWorks Japan office and learned about interesting work done by my colleague Hitoshi Takeshita.... read more >>

# Simulink Debugger: Monitoring Variable Step Solver Performance2

Posted by Guy Rouleau,

A few months ago I introduced my favorite command to analyze the performance of a variable-step solver.... read more >>

# Why do we need Stiff ODE Solvers?1

Posted by Guy Rouleau,

I hope you have noticed the new MATLAB Central blog: Cleve's Corner. Cleve once said "stiffness is an efficiency issue." Let's explore this from a Simulink point of view by revisiting an article by Cleve in MATLAB News and Notes, May 2003: Stiff Differential Equations.... read more >>

# Continuous sample time inside For Each Subsystem7

Posted by Guy Rouleau,

Back in 2010, I wrote a post explaining how to apply a scalar algorithm to a vector using the For Each subsystem. At that time, only discrete algorithms could be vectorized that way. In R2011b, the For Each subsystem now supports continuous sample times.... read more >>

# Parallel Computing with Simulink: Running Thousands of Simulations!11

Posted by Seth Popinchalk,

If you have to run thousands of simulations, you will probably want to do it as quickly as possibly. While in some cases this means looking for more efficient modeling techniques, or buying a more powerful computer, in this post I... read more >>

# Refining the Output of a Simulation8

Posted by Seth Popinchalk,

Today I am pleased to share a post from regular guest blogger, Guy Rouleau.  Enjoy!... read more >>

# Modeling Mechanical Systems: The Double Pendulum34

Posted by Seth Popinchalk,

Do you ever have to model mechanical systems?  Mechanical systems consist of bodies, joints, and force elements like springs.  In this post, I will show you how to model a double pendulum with base Simulink and using SimMechanics.... read more >>

# Challenge: Metronome and Cart Equations of Motion6

Posted by Seth Popinchalk,

I haven’t
seen much activity on the Metronome Synchronization Challenge, so I want to provide a peak at the basis
for my solution.  I took the approach of modeling a pendulum, and then linking
its dynamics to the dynamics of a cart.  The challenge is choosing the right
coordinate systems to assign to each... read more >>