This project is still a work in progress !

I'm making a miniature version of the BDX Droid by Disney. It is about 35 centimeters tall with its legs extended.

This is a policy trained in Isaac Gym with AWD.

Sim2Sim from Isaac to Mujoco

This is a policy trained in Isaac Gym for standing up while being robust to perturbations.

Sim2Real walking is starting to work !

This is kind of a hub where I centralize all resources related to this project. This is a working repo, so there are a lot of undocumented scripts :) I'll try to clean things up at some point.

https://cad.onshape.com/documents/a18ff8cc622a533762a3a6f5/w/27ef6089ad5fe9ba396b6036/e/9ce9b71d7a21eb04415b067f

See this document for getting from a onshape design to a simulated robot in MuJoCo

Idler cap https://cad.onshape.com/documents/be101dee8170780f05a04bfa/w/c49eb6dbb859e081d7ac252c/e/935d77385a5196902c262118

We now use AWD

We used Rhoban's BAM

Note : I switched to using xc330-M288-T servomotors instead of xl330-M288-T for the legs. They are more expensive, but way more powerful. Maybe we'll try to go back to xl330 servos once everything is working properly with the xc330.

https://docs.google.com/spreadsheets/d/18hrYgjaE9uL2pnrnq5pNUzFLZcI4Rg0AvSc9sqwE680/edit?usp=sharing

TODO

The current version (alpha) is not very easy to build, has some mechanical problems (too much play at some joints). After everything works on this version of the robot, I will redesign it from the ground up, trying to make it more accessible and better mechanically designed !

This repo contains the code to run the policies on the onboard computer (Raspberry pi zero 2w) https://github.com/apirrone/Open_Duck_Mini_Runtime

• https://www.nature.com/articles/s41598-023-38259-7.pdf
• https://arxiv.org/pdf/2304.13653
• https://arxiv.org/pdf/2401.16889
• https://arxiv.org/pdf/1801.01290
• First comment of this video explains the reward https://www.youtube.com/watch?v=L_4BPjLBF4E
• https://www.haonanyu.blog/post/sim2real/

• https://www.nvidia.com/en-us/on-demand/session/gtc24-s63374/
• https://la.disneyresearch.com/publication/design-and-control-of-a-bipedal-robotic-character/

• https://stable-baselines.readthedocs.io/en/master/guide/pretrain.html 

• https://cults3d.com/en/3d-model/gadget/robot-disney-star-wars
• https://www.disneytouristblog.com/wp-content/uploads/2023/10/bd1-droid-testing-disney-imagineering-2.jpg
• nice close up video https://www.youtube.com/watch?v=QuWaaNN-1hs

• https://github.com/rgalljamov/DRLoco
• https://xbpeng.github.io/projects/DeepMimic/index.html

• https://github.com/google-deepmind/mujoco_mpc

Thanks a lot to HuggingFace for sponsoring this project !