GenSim2:
Scaling Robot Data Generation
with Multi-modal and Reasoning LLMs
Abstract
Robotic simulation today remains challenging to scale up due to the human efforts required to create diverse simulation tasks and scenes. Simulationtrained policies also face scalability issues as many sim-to-real methods focus on a single task. To address these challenges, this work proposes GenSim2, a scalable framework that leverages coding LLMs with multi-modal and reasoning capabilities for complex and realistic simulation task creation, including longhorizon tasks with articulated objects. To automatically generate demonstration data for these tasks at scale, we propose planning and RL solvers that generalize within object categories. The pipeline can generate data for up to 100 articulated tasks with 200 objects and reduce the required human efforts.
To utilize such data, we propose an effective multi-task language-conditioned policy architecture, dubbed proprioceptive point-cloud transformer (PPT), that learns from the generated demonstrations and exhibits strong sim-to-real zero-shot transfer. Combining the proposed pipeline and the policy architecture, we show a promising usage of GenSim2 that the generated data can be used for zero-shot transfer or co-train with real-world collected data, which enhances the policy performance by 20% compared with training exclusively on limited real data.
Generated Task Library
Primitive Tasks
Long-horizon Tasks
Real-Robot Experiments
Real Only
Sim+Real
Compared to using only 10 real-world trajectories, incorporating generated simulation data enhances the generalization of real-world policies across multiple tasks. Tasks shown here are executed using a multi-task policy.
GenSim2 Framework
The GenSim2 framework consists of (1) task proposal, (2) solver creation, (3) multi-task training, and (4) generalization and sim-to-real transfer.
GenSim2 Solver Generation Pipeline
Multi-modal task solver generation pipeline that utilizes GPT-4 and optimization configurations for scalable manipulation task solutions.
Planner Overview
We demonstrate how to leverage the keypoint planner to solve the OpenBox task. Initially, constraints are defined to ensure the gripper contacts the box lid. Based on this actuation pose, specific motions are assigned to complete the task of opening the box.
Proprioceptive Pointcloud Transformer
The proposed Proprioception Point cloud Transformer (PPT) policy architecture maps language, point cloud, and proprioception inputs in a shared latent space for action prediction.
Experiments
BibTeX
@inproceedings{huagensim2,
title={GenSim2: Scaling Robot Data Generation with Multi-modal and Reasoning LLMs},
author={Hua, Pu and Liu, Minghuan and Macaluso, Annabella and Lin, Yunfeng and Zhang, Weinan and Xu, Huazhe and Wang, Lirui},
booktitle={8th Annual Conference on Robot Learning}
}