Method for determining the position of an actuating device, corresponding actuating device

Actuating device of at least one element for actuating an aircraft seat, the actuating device comprising a calculating unit, an actuator mounted to be movable in translation and/or rotation on an output shaft so as the actuate the corresponding at least one element of an aircraft seat, said output shaft being connected to an angular position encoder so that a position (X) of the actuator on said output shaft corresponds to a single angular position (0) of the encoder, said device being configured to implement a method for determining the position of the actuating device, the method comprising a preliminary submethod of automatically calibrating said actuating device comprising the following steps:

• a step of placing the actuator at a predetermined position (Xref) corresponding to an expected angle value (θatt) of the encoder;
• a step of measuring an initial positioning angle value (θini) of the angular position encoder when the actuator shaft is in the predetermined position (Xref);
• a step of comparing said initial positioning angle value (θini) and said expected angle value (θatt);
• a step of calculating the angular offset (θdécal) of the angular position encoder signal, with θdécal=(θini−θatt) [MODULO 360°], θdécal being between 0° and 359°;
• and
• a step of measuring the position (X (t)) of the actuator at a given moment according to the following relationship:
• X
• ⁡
• (
• t
• )
• =
• [
• (
• θ
• +
• θdécal
• )
• [
• MODULO
• ⁢
• 360
• ⁢
• °
• ]
• ]
• K
• +
• X
• ⁢
• min
• with Xmin a minimum position of the actuator, and
• with K a proportion coefficient between the angle value sent by the encoder and the value of the actuator position.