Hybrid Diffusion for Simultaneous Symbolic and Continuous Planning

Fuente: arXiv
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Autores principales: Høeg, Sigmund Hennum, Vaaler, Aksel, Liu, Chaoqi, Egeland, Olav, Du, Yilun
Formato: Preprint
Publicado: 2025
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author Høeg, Sigmund Hennum
Vaaler, Aksel
Liu, Chaoqi
Egeland, Olav
Du, Yilun
author_facet Høeg, Sigmund Hennum
Vaaler, Aksel
Liu, Chaoqi
Egeland, Olav
Du, Yilun
contents Constructing robots to accomplish long-horizon tasks is a long-standing challenge within artificial intelligence. Approaches using generative methods, particularly Diffusion Models, have gained attention due to their ability to model continuous robotic trajectories for planning and control. However, we show that these models struggle with long-horizon tasks that involve complex decision-making and, in general, are prone to confusing different modes of behavior, leading to failure. To remedy this, we propose to augment continuous trajectory generation by simultaneously generating a high-level symbolic plan. We show that this requires a novel mix of discrete variable diffusion and continuous diffusion, which dramatically outperforms the baselines. In addition, we illustrate how this hybrid diffusion process enables flexible trajectory synthesis, allowing us to condition synthesized actions on partial and complete symbolic conditions.
format Preprint
id arxiv_https___arxiv_org_abs_2509_21983
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Hybrid Diffusion for Simultaneous Symbolic and Continuous Planning
Høeg, Sigmund Hennum
Vaaler, Aksel
Liu, Chaoqi
Egeland, Olav
Du, Yilun
Robotics
Artificial Intelligence
Constructing robots to accomplish long-horizon tasks is a long-standing challenge within artificial intelligence. Approaches using generative methods, particularly Diffusion Models, have gained attention due to their ability to model continuous robotic trajectories for planning and control. However, we show that these models struggle with long-horizon tasks that involve complex decision-making and, in general, are prone to confusing different modes of behavior, leading to failure. To remedy this, we propose to augment continuous trajectory generation by simultaneously generating a high-level symbolic plan. We show that this requires a novel mix of discrete variable diffusion and continuous diffusion, which dramatically outperforms the baselines. In addition, we illustrate how this hybrid diffusion process enables flexible trajectory synthesis, allowing us to condition synthesized actions on partial and complete symbolic conditions.
title Hybrid Diffusion for Simultaneous Symbolic and Continuous Planning
topic Robotics
Artificial Intelligence
url https://arxiv.org/abs/2509.21983