AI & ML
TRACE: Target-State Risk-Aligned Conditional Execution for Embodied Tracking
arXiv cs.RO0 views
arXiv:2610.41275v1 Announce Type: new Abstract: Embodied visual tracking requires a robot to follow a language-specified person under occlusion, look-alike distractors, and ambiguous instructions. We show that improving tracking persistence can simultaneously increase safety violations. Using a compact 0.6B vision-language-action (VLA) tracker with a frozen backbone, we update only the planner head with proximal policy optimization (PPO). PPO improves success and following rates across all three EVT-Bench settings, but increases the collision rate on distracted tracking because episodes that previously ended in target loss can instead end in contact. We introduce TRACE, an execution-time target-state risk gate that preserves the learned policy and intervenes selectively. A lightweight risk head processes 84 cues, including candidate boxes, identity margins, a learned range-and-bearing probe, and the policy's commands. When the calibrated risk exceeds a threshold, TRACE rescales the translational component of the next waypoint while leaving yaw unchanged. The executed action is identical to PPO's on more than 98% of steps. In paired evaluations on identical episodes, TRACE reduces the distracted-tracking collision rate by 3.96 percentage points, while further improving success and following rates. Matched slowdown controls without target-state timing do not reproduce this improvement. Concurrent evaluation reproduces a collision reduction of 3.77 points, compared with 0.29 points for identical-arm null pairs, indicating that the effect exceeds evaluation variability. These results show that target-state-aware execution can recover the safety cost of policy post-training with minimal intervention.
Source:https://arxiv.org/abs/2610.41275PreviousCONSORT: Uncertainty-Constrained Multi-Robot Planning for Cooperative Localization in GPS-Denied EnvironmentsNextLearning from Physical Experience:Context-Space Adaptation for Robotic Manipulation
Related posts
Qodo builds context into AI code review with Codex
0OpenAI Blog

Ford promises not to sell your driving habits to data brokers
0The Verge
Snap settles lawsuit accusing platform of fueling teen depression and eating disorders
0TechCrunch
Scrape LinkedIn job postings without logging in (Python + Google Sheets)
0dev.to
Same model, same defences: 7 document attacks down to 0, chat attacks barely moved
0dev.to
Skill to Create Product Videos
0Hacker News