Attached in a minimum working example of two bars swinging. Each bar is 1 m long and weighs 1 kg. The center of mass of each bar is at the end. The diagonal terms of the moment of Inertia tensor are 9999 for one and 0 for the other. One should behave like a simple pendulum, while the other should fall very slowly.
In pybullet they both behave identically. As expected, the simple pendulum's period is slightly longer than the small angle period of 2*pi*sqrt(1/9.8 ) or 2.01 s probably due to the reasons discussed here http://www.bulletphysics.org/Bullet/php ... =9&t=11694. Is there any reason why the pendulum with large moment of inertia does not fall slowly?
Pybullet: pendulum swing independent of moment of inertia
Pybullet: pendulum swing independent of moment of inertia
- Attachments
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- links9999.urdf.txt
- urdf file for I = 9999
- (1.04 KiB) Downloaded 371 times
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- links0000.urdf.txt
- urdf file for I = 0
- (1.04 KiB) Downloaded 385 times
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- I_MWE.py.txt
- main python script
- (1.39 KiB) Downloaded 306 times