Alan Hou

Latest article / 最新文章

Is Your Robot's Memory Just a Clock? Temporal Shortcuts in Memory-Augmented VLA Policies

机器人的记忆难道只是一块时钟？揭秘具身 VLA 大模型中的时间捷径与虚假进度

Nanyang Technological University researchers uncover a startling vulnerability in memory-augmented Vision-Language-Action (VLA) models: 'phantom progress'. Because memory buffers sample frames uniformly over time, policies treat mere clock ticks as physical work. A brief 5-second pause causes robots to prematurely terminate tasks—cutting manipulation success from 47/50 to 16/50. The authors prove that VLA models exploit temporal shortcuts rather than remembering events, and demonstrate that event-indexed memory restores robustness without retraining.