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Led by Google DeepMind, we present ALOHA 2 🤙: An Enhanced Low-Cost Hardware for Bimanual Teleoperation. ALOHA 2 🤙 significantly improves the durability of the original ALOHA 🏖️, enabling fleet-scale data collection on more complex tasks. As usual, everything is open-sourced!

144,015 Aufrufe • vor 2 Jahren •via X (Twitter)

10 Kommentare

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

Before diving into the hardware, we also release a *proper* ALOHA sim model with SysID, thanks to @kevin_zakka @the_real_btaba @ayzwah. Even if you don’t have the hardware, there is now a way to perform complex tasks with ALOHA in Mujoco!

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

We start by improving the grippers: to make them grasp better and more robust. We use a low-friction rail design that transmits 2x more force to the gripper tips. We also change the grip tape layout to improve grasping of small objects. Led by @SpencerGoodric6 and Thinh Nguyen

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

We use the same rail design on the leader side. To further improve ergonomics, we replace the original servo with a lower gear ratio one that is easier to backdrive. This results in a 10x reduction in friction that the operator needs to overcome when opening grippers!

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

Next, we improve the gravity compensation of the leader arm. With a constant-force retractor and a spring-pulley system, the arm can "float" in most places. It is also much more durable than the original rubberbands!

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

Last but not least: we simplify the frame surrounding the workcell while maintaining the rigidity of the camera mounting points. This opens up the space for both human-robot collaborators and props for the robot to interact with.

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

To learn more, please visit our website: Paper: Tutorial: Designs: Sim:

Profilbild von Tony Z. Zhao
Tony Z. Zhaovor 2 Jahren

Thanks to the core ALOHA 2 Team: @RandomRobotics @chelseabfinn @peteflorence @SpencerGoodric6 Thinh Nguyen @JonathanTompson @ayzwah @tonyzzhao and those who helped with hardware, software, data, simulation, and user studies: Jorge Aldaco, Robert Baruch, Jeff Bingham, Sanky Chan, Kenneth Draper, @debidatta, Wayne Gramlich, Torr Hage, @AlexHerzog00, Jonathan Hoech, Ian Storz, @the_real_btaba, @leilatakayama, Ted Wahrburg, Sichun Xu, Sergey Yaroshenko, and @kevin_zakka

Profilbild von Masato Kobayashi @るっと🐺
Masato Kobayashi @るっと🐺vor 2 Jahren

@GoogleDeepMind @tonyzzhao This is an incredibly fantastic achievement! I'm excited! Please look forward to our report on interesting research about imitation learning as well! This is part of that research.

Profilbild von Brett Adcock
Brett Adcockvor 2 Jahren

@GoogleDeepMind good work Tony / team

Profilbild von Keerthana Gopalakrishnan
Keerthana Gopalakrishnanvor 2 Jahren

@GoogleDeepMind lmfao @peteflorence and @andyzeng_ 🤣

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This is how ALOHA's "teleoperation" system works - a fancy word for "remote control". Training robots will be more and more like playing games in the physical world. A human operates a "joystick++" to perform tasks and collect data, or intervene if there's any safety concern. There's actually a learning curve to master the controller, much like practicing gaming skills. Teleoperation can be done in many different ways. ALOHA is an impressive custom-built system with very low cost. Here're a few alternatives: (1) Motion Capture (MoCap): apply the MoCap systems used for Hollywood movies to capture the fine-grained motions of hand joints. There would be no "embodiment gap" if the robot hand has 5 fingers. For instance, a demonstrator can wear a CyberGlove ( and manipulate the objects. CyberGlove will capture the motion signals & haptic feedback in real-time, which can be re-targeted onto the humanoid. (2) Wearing gloves & markers can be clumsy. An alternative way to do MoCap is through computer vision. DexPilot from NVIDIA enables marker-less and glove-free data collection. The human operator simply uses their bare hands to perform the tasks. 4 Intel RealSense depth cameras and 2 NVIDIA Titan XP GPUs (yeah, 2019 work) translate the pixels to precise motion signals for robot learning. (3) VR Headset: turn the training room into a VR game and "role play" the robot. This has the advantage of scalable remote data collection - annotators from around the world can contribute without coming onsite. VR demonstration technique appeared in research projects like the iGibson home robot simulator, an initiative that I participated in at Stanford: Behind-the-scene video by Litian Liang

Jim Fan

124,588 Aufrufe • vor 2 Jahren

I was really impressed by the UMI gripper (Cheng Chi et al.), but a key limitation is that **force-related data wasn’t captured**: humans feel haptic feedback through the mechanical springs, but the robot couldn’t leverage that info, limiting the data’s value for fine-grained manipulation tasks. Led by my amazing students Yolanda Zhu and Binghao Huang, we designed a **portable visuo-tactile gripper** by integrating our dense, flexible tactile arrays with the UMI gripper to enable large-scale in-the-wild data collection. 🔗 We demonstrate **cross-modal representation learning** and **downstream policy learning** on tasks requiring in-hand state estimation (e.g., test tube reorientation) and fine-grained force sensing (e.g., pipette fluid transfer). Key takeaways: - Our flexible tactile arrays store the rich haptic information humans perceive as dense tactile signals. - Portability and robustness are key for in-the-wild data collection; our portable gripper is compact, lightweight, and durable. - Touch provides precise, robust measurements of in-hand object pose, invariant to lighting and viewpoint. - Cross-modal pretraining on large-scale in-the-wild data significantly improves policy robustness and sample efficiency (as shown many times before — and verified again here!). Also check out our previous investigations of dense, flexible tactile grids for understanding human-robot-environment interactions: - Dense tactile glove (Nature ’19): - 3D-ViTac (CoRL ’24):

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