Robust Execution of Rover Plans via Action Modalities Reconfiguration

Robust execution of exploration mission plans has to deal with limited computational power on-board a planetary rover, and with limited rover's autonomy. Typically, these limitations prevent the rover to synthesize a new mission plan when some unexpected contingency arises. The paper shows that when such deviations refers to anomalies on the consumption of resources, robust execution can be achieved efficiently through an action reconfiguration approach instead of a replanning from scratch. Building up on an extended action model representation, the paper proposes an effective continual planner - ReCon - that, exploiting a general purpose CSP solver, is able to (i) detect violations of mission resource constraints, and (ii) find (if any) a new configuration of actions