Poster
Fourier Transporter: Bi-Equivariant Robotic Manipulation in 3D
Haojie Huang · Owen Howell · Dian Wang · Xupeng Zhu · Robert Platt · Robin Walters
Halle B
Abstract:
Many complex robotic manipulation tasks can be decomposed as a sequence of pick and place actions. Training a robotic agent to learn this sequence over many different starting conditions typically requires many iterations or demonstrations, especially in 3D environments. In this work, we propose Fourier Transporter ($\text{FourTran}$) which leverages the two-fold $\mathrm{SE}(d)\times\\mathrm{SE}(d)$ symmetry in the pick-place problem to achieve much higher sample efficiency. $\text{FourTran}$ is an open-loop behavior cloning method trained using expert demonstrations to predict pick-place actions on new environments. $\text{FourTran}$ is constrained to incorporate symmetries of the pick and place actions independently. Our method utilizes a fiber space Fourier transformation that allows for memory-efficient construction. We test our proposed network on the RLbench benchmark and achieve state-of-the-art results across various tasks.
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