Diagnostic operation method and system for a transport vehicle automatic or semi-automatic access device

A health status assessment system for a transport vehicle automatic or semi-automatic access device comprising:

• at least one leaf suitable for being actuated by a kinematic chain including at least one motor supplied with electricity and having an associated angular position or rotation speed encoder and at least one switch;
• the access device being movable between an open position and a closed position;
• and
• a computing unit including at least one processor, the at least one processor configured to accept and execute a plurality of instructions to implement said health status assessment system and suitable for carrying out, for at least one actuating cycle of the kinematic chain between a first position among the open and closed positions and a second position, different from the first position, from among the closed and open positions, said plurality of instructions including, 1) an acquisition of information, during one said cycle,
• relative to the kinematic chain comprising at least one piece of information representative of the electrical energy consumed by the motor, or position, or speed information provided by said encoder or binary information indicating positions of switches of the actuating kinematic chain, 2) a division of said cycle into a plurality of functional segments based on said acquired information, 3) a calculation of at least one descriptor value per functional segment, and 4) establishment of a health status diagnosis comprising a degradation detection as a function of at least part of said calculated descriptor values, wherein the computing unit being suitable, for when a degradation is detected, to calculate one or several individual health indicators per functional segment, calculate at least one signature vector including at least some of the individual health indicators, estimate a similarity measurement between said signature vector and at least one reference signature vector representative of a degradation, and identify the degradation based on the estimate of a similarity measurement.