ASAP: Aligning Simulation and Real-world Physics

Technical Analysis Humanoid robots mimicking famous players thanks to ASAP Humanoid robots hold the potential for unparalleled versatility for performing human-like, whole-body skills. However, achieving agile and coordinated whole-body motions remains a significant challenge due to the dynamics mismatch between simulation and the real world. Here comes "ASAP: Aligning Simulation and Real-World Physics for Learning Agile Humanoid Whole-Body Skills", a two-stage framework designed to tackle the dynamics mismatch and enable agile humanoid whole-body skills. Motivation of the Work The ultimate goal in robotics is to create humanoid robots capable of achieving, or even surpassing, human-level agility and versatility in performing complex, whole-body skills. While researchers have made significant progress, particularly in basic locomotion (walking) and some upper-body motions, achieving highly agile and coordinated motions remains a fundamental challenge. The core issue is the dynamics mismatch—the difference between how physics works in the computer simulation and how physics works in the real world (the "sim-to-real gap"). Current main approaches to bridge this gap have significant limitations: System Identification (SysID): This method tries to manually estimate or calculate real-world physical parameters (like robot mass or motor characteristics) and transfer those to the simulator. It often requires labor-intensive parameter tuning and relies on a predefined set of…