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SAIL: Faster-than-Demonstration Execution of Imitation Learning Policies

Created by
  • Haebom

Author

Nadun Ranawaka Arachchige, Zhenyang Chen, Wonsuhk Jung, Woo Chul Shin, Rohan Bansal, Pierre Barroso, Yu Hang He, Yingyang Celine Lin, Benjamin Joffe, Shreyas Kousik, Danfei Xu

Outline

This paper addresses the challenge of overcoming the limitations of existing offline imitation learning (IL) methods, which only perform tasks at the speed of demonstration data, and instead implement visuomotor policies faster than the demonstration. We identify fundamental issues related to the evolution of robot dynamics and state-action distributions, and propose the Speed Adaptation for Imitation Learning (SAIL) system to address these issues. SAIL consists of four components: a consistent action inference algorithm, high-precision tracking of controller-invariant motion objectives, adaptive speed control based on motion complexity, and action scheduling to handle real-world system delays. Experimental results on 12 tasks across simulations and two real robot platforms demonstrate that SAIL achieves up to a fourfold speedup in simulations and up to a 3.2-fold speedup in real-world environments.

Takeaways, Limitations

Takeaways:
Demonstrates the possibility of performing robot tasks at a faster rate than the demo.
Demonstrated effective performance in both simulations and real robot platforms.
Contributes to improving robot work throughput.
It presents potential applications in various fields, including industrial automation.
Limitations:
Further research is needed on the generalization performance of the SAIL system.
Scalability verification is needed for various robot platforms and tasks.
There may still be dependencies on the quality and quantity of demo data.
Robustness verification against unpredictable situations in real environments is required.
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