用仿真先验实现零样本绳子动态操作,精准高效。
Wiggle and Go! System Identification for Zero-Shot Dynamic Rope Manipulation

- 通过观察绳子运动估计物理参数,指导机器人动作预测。
- 真实场景下3D目标打击平均误差仅3.55厘米,提升显著。
- 无需重训练即可切换任务,适合多场景机器人操作。
许多机器人任务容错率极低;一次动态抛掷失误可能导致严重延迟或不可恢复失败。为缓解此问题,我们提出一种新方法,利用学习到的仿真先验来指导零样本动态绳子操作,实现高效准确的任务执行。现有方法要么依赖大量真实数据估算绳子行为,要么需多次尝试迭代优化。我们提出Wiggle and Go!——一种两阶段系统识别框架,可实现零样本绳子操控。该框架包含系统识别模块,通过观测绳子运动预测其物理参数,进而指导优化算法生成目标条件下的机器人动作,实现在真实环境中的零样本执行。同一任务无关的系统识别模块支持多种动态操作任务间的无缝切换,使单个模型可适配多样化操控策略。在真实环境中,使用绳子系统参数时3D目标打击平均精度达3.55厘米,相较未引入系统参数的模型(15.34厘米)显著提升。在未见过的轨迹上,预测与真实绳子傅里叶频率的皮尔逊相关系数达0.95。
原文摘要 · Abstract (English)
Many robotic tasks are unforgiving; a single mistake in a dynamic throw can lead to unacceptable delays or unrecoverable failure. To mitigate this, we present a novel approach that leverages learned simulation priors to inform goal-conditioned dynamic manipulation of ropes for efficient and accurate task execution. Related methods for dynamic rope manipulation either require large real-world datasets to estimate rope behavior or the use of iterative improvements on attempts at the task for goal completion. We introduce Wiggle and Go!, a system-identification, two-stage framework that enables zero-shot task rope manipulation. The framework consists of a system identification module that observes rope movement to predict descriptive physical parameters, which then informs an optimization method for goal-conditioned action prediction for the robot to execute zero-shot in the real. Our method achieves strong performance across multiple dynamic manipulation tasks enabled by the same task-agnostic system identification module which offers seamless switching between different manipulation tasks, allowing a single model to support a diverse array of manipulation policies. We achieve a 3.55 cm average accuracy on 3D target striking in real using rope system parameters in comparison to 15.34 cm accuracy when our task model is not system-parameter-informed. We achieve a Pearson correlation coefficient of 0.95 between Fourier frequencies of the predicted and real ropes on an unseen trajectory. Project website please see https://wiggleandgo.github.io/
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