这项研究解决了灵巧操作中触觉信息从仿真到现实迁移的瓶颈，做机器人灵巧操作或触觉感知的团队可以直接参考其CoP表示方法，零样本迁移效果值得一试。
该研究提出了一种基于物理原理的触觉表示方法——压力中心（CoP），用于解决仿真到现实（sim-to-real）迁移中触觉信息丢失的问题。传统方法常将触觉数据简化为粗糙的低维特征，而CoP保留了密集的接触信息，同时保持对仿真到现实迁移的鲁棒性。研究还提出了一种基于可导动力学的传感器校准方案，无需真实力测量即可估计触觉传感器方向。在盲操作任务（如插销入孔和球平衡）中，基于CoP的策略在五指手上实现了零样本仿真到现实迁移，性能优于二进制接触和原始触觉基线。分析表明，CoP策略能编码物体质量等任务相关物理属性，作为控制的副产品涌现。
Beyond Binary: Sim-to-Real Dexterous Manipulation with Physics-Grounded Contact Representation
A primary bottleneck in contact-rich manipulation is the difficulty of collecting real-world data. Sim-to-real reinforcement learning offers a scalable alternative, but the simulation-reality gap prevents information-dense modalities like touch from being effectively used. Existing sim-to-real methods often mitigate this gap by simplifying tactile data into coarse low-dimensional features -- sacrificing the richness required for complex manipulation. In this work, we introduce Center-of-Pressure (CoP), an effective tactile representation grounded in physical principles that preserves dense contact information while maintaining robustness for sim-to-real transfer. To support this representation, we propose a sensor calibration scheme based on differentiable dynamics, enabling the estimation of taxel orientations without requiring ground-truth force measurements. We evaluate CoP on two blind, challenging contact-rich manipulation tasks: peg-in-hole insertion and ball balancing. Across both tasks, policies conditioned on CoP achieve zero-shot sim-to-real transfer on a multi-fingered hand, and outperform both coarse binary-contact and raw-taxel baselines. Analysis of learned policy states further suggests that CoP-conditioned policies encode task-relevant physical properties, such as object mass, as an emergent byproduct of control.