multi-disc friction brake device

I am looking to build a multi-disc friction brake device that can provide different frictional torques under various working conditions. Are there any examples in Simscape or Multibody?The friction torque can be automatically changed by means of speed and torque.

Answer 1

[Epsilon]

Hi Christopher,

Simscape Driveline contains the "Disc Brake" block, whose parameters can be adjusted to provide different frictional torques under various working conditions. The block represents a brake system where a cylinder applies pressure to one or more pads that can contact the shaft rotor. Pressure from the cylinder causes the pads to exert friction torque on the shaft.

The block accepts a physical signal for the cylinder pressure, and the output is a conserving rotational terminal associated with the shaft. The block's parameters can be initialized using variables, which can then be tuned during the simulation runtime to represent different working conditions. An alternative approach is to use variant subsystems for the various working conditions as well.

For further information on the "Disc Brake" block, please refer to the following documentation: https://www.mathworks.com/help/releases/R2024b/sdl/ref/discbrake.html

I am not aware of any block or example that can directly help with the above task, but the "Fixed Caliper Disk Brake Example" can be used to gain some insights. Here is the link to the mentioned example: https://www.mathworks.com/help/releases/R2024b/sdl/ug/fixed-caliper-disk-brake.html

Answer 2

[Umeshraja]

Hi @Christopher,

Further @Epsilon point, I came across a helpful MATLAB Answers post that explains how to model a simple brake in the Simscape mechanical rotational domain. The example demonstrates how a braking torque is introduced based on input pressure, and no torque is applied if the system isn't moving.

You can check out the post here:

https://www.mathworks.com/matlabcentral/answers/2177262-how-to-model-a-simple-brake-in-simscape-mechanical-rotational-domain

It’s a simplified example, but it could serve as a good starting point for your model. Feel free to use it as a reference!

Hope this helps!