Method for controlling the kinematics of a seat having movable portions by space of freedom and seat carrying it out

Seat (10) comprising at least two portions (16, 18, 20, 22) which are movable relative to each other and at least two actuators (24, 25, 26, 27) for moving the movable portions in order to modify the configuration of the seat from an initial position to a final position which is determined by a user, at least one movable portion (16, 18, 20, 22) comprising a predetermined specific point (P1, P2, P3, P4), the seat (10) being characterised in that it comprises, for each specific point:

• means for defining, for the or each specific point, an authorised travel conduit between the initial position and the final position, the travel conduit being delimited by at least two opposite lateral boundaries;
• means for calculating the current position and the current direction of the specific point;
• means for establishing a target direction for the specific point that is suitable for moving the seat in the authorised travel conduit from the boundaries of the associated travel conduit;
• means for controlling at least one actuator associated with the specific point in order to move the specific point according to the established target direction;
• means for comparing the current direction of the specific point and the target direction;
• and
• means for modifying the direction of the specific point in order to force the specific point to move in the associated travel conduit thereof in the target direction as far as the final position of the seat.