The invention relates to the technical field of automobile control, and provides an active air-inlet grille
actuator step loss prevention self-calibration method and
system. The method comprises the following steps: firstly, arranging a microswitch at a completely closed position of a blade to establish a non-tampering absolute position reference, and using a trigger
signal of the absolute position reference as a physical reference point for
system calibration; and continuously comparing the actual state of the switch with the expected state calculated based on the
step number to realize real-time diagnosis of step loss abnormity. And when the states are detected to be inconsistent, the
system automatically triggers a self-calibration process, the blade is controlled to recalibrate the reference position and the maximum opening limit, and the linear mapping relation between the
step number and the opening angle is dynamically reconstructed. Through the synergistic effect of physical reference positioning and intelligent diagnosis, the accuracy of blade opening control and the system reliability are remarkably improved, the problem of
pose misalignment caused by external force intervention,
mechanical abrasion and the like is effectively solved, and a complete solution is provided for accurate control over the active air inlet grille.