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How to fix a freedom in Simscape?

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Bo on 5 Feb 2018
Answered: Nicolas Schmit on 9 Feb 2018
Hi I am using the model from
I know MATLAB and Simulink, but I am a newbie for Simscape.
What I am trying to do is fix the Quadrotor's pitch and roll axis. So that the drone's pitch and roll will not change any more. In this way, I could tune the drone's altitude controller by itself first.
As a new guy of Simscape, I think I need to change some settings in Transform or 6 DOF joint. But I've no idea where to change. I am also confused about the difference between Transform and 6 dof joint.
Any one can give me some ideas? Thanks,


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Birdman on 6 Feb 2018
You just need to share the file with .mdl extension. Not the entire project.
Bo on 6 Feb 2018
I have made this public long ago. You can run this project and open the model from project shortcut. The models are .slx files now.
Bo on 6 Feb 2018
The part that I took screenshot is in Quadrotor_Controller.slx. You'll need to open the External Force block. Thanks.

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Accepted Answer

Nicolas Schmit
Nicolas Schmit on 9 Feb 2018
Replace the 6-DOF joint with a prismatic joint.


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