Action chunking
Physical AI
Predicting a sequence of future actions in one policy prediction.
A controller may execute all or part of a predicted chunk before updating its plan. The time covered depends on the control rate and execution method. Training data must preserve action order and timing; the same number of actions can represent different durations in different datasets.
In practice
Ten action targets recorded at 10 Hz span a different duration from ten targets recorded at 50 Hz.