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This position paper argues that humanoid robots should co-optimize body morphology and learned control policies, rather than training policies on fixed hardware. Its main ideas, including Sim2Real transfer and meta-policy learning, are still proposals, and the paper does not present empirical results. For AI readers, the practical question is whether learning-driven design loops can improve embodied systems in real-world, resource-constrained settings, and the "physical RSI" framing should be read as a research agenda rather than a demonstrated capability.
Source coveringarXiv

Toward Physical Recursive Self-Improvement: A Call for Body-Control Co-Design for Humanoid Robot

arXiv2 min read

arXiv:2510.03081v2 Announce Type: replace Abstract: Humanoid robots, as general-purpose physical agents, must integrate both intelligent control and adaptive morphology to operate effectively in diverse real-world environments. While recent research primarily optimizes control policies for fixed bodies, we advocate body-control co-design as a path toward physical Recursive Self-Improvement (RSI): using experience from a humanoid's current body and policy to guide successive improvements to both. Inspired by biological evolution, this approach enables robots to recursively adapt both their form and behavior to optimize performance within task-specific and resource-constrained contexts. Despite its promise, co-design in humanoid robotics remains a relatively underexplored domain, raising fundamental questions about its feasibility and necessity in achieving true embodied intelligence. To address these challenges, we discuss potential co-design methodologies grounded in strategic exploration, Sim2Real transfer, and meta-policy learning. We further argue for the essential role of co-design by analyzing it from methodological, application-driven, and community-oriented perspectives. Striving to guide and inspire future studies, we present open research questions, spanning from short-term innovations to long-term goals. Ultimately, co-design offers a path toward physical RSI in humanoids that improves their bodies and policies while learning to make this improvement process more effective.

Abstract:Humanoid robots, as general-purpose physical agents, must integrate both intelligent control and adaptive morphology to operate effectively in diverse real-world environments. While recent research primarily optimizes control policies for fixed bodies, we advocate body-control co-design as a path toward physical Recursive Self-Improvement (RSI): using experience from a humanoid's current body and policy to guide successive improvements to both. Inspired by biological evolution, this approach enables robots to recursively adapt both their form and behavior to optimize performance within task-specific and resource-constrained contexts. Despite its promise, co-design in humanoid robotics remains a relatively underexplored domain, raising fundamental questions about its feasibility and necessity in achieving true embodied intelligence. To address these challenges, we discuss potential co-design methodologies grounded in strategic exploration, Sim2Real transfer, and meta-policy learning. We further argue for the essential role of co-design by analyzing it from methodological, application-driven, and community-oriented perspectives. Striving to guide and inspire future studies, we present open research questions, spanning from short-term innovations to long-term goals. Ultimately, co-design offers a path toward physical RSI in humanoids that improves their bodies and policies while learning to make this improvement process more effective.

Robotics (cs.RO)

arXiv:2510.03081 [cs.RO]

(or arXiv:2510.03081v2 [cs.RO] for this version)

https://doi.org/10.48550/arXiv.2510.03081 Focus to learn more arXiv-issued DOI via DataCite

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Full text under the publisher's open licence · 278 words