Patent ID: 7057364

Claim:
An actuating system for actuating a member, the actuating system comprising: a computer; an electric motor controlled by the computer, wherein the computer is configured to regulate a current supplied to the motor as a function of a setpoint position of the member to be actuated; a transmission device for transmitting a movement of the motor to the member, wherein the transmission device comprises an encoder that is dependent on the movement of the motor, said encoder comprising a main multipolar track and a singularity that is indexed to a reference position of the encoder; a fixed sensor comprising at least two sensitive elements arranged to face the main track across an air-gap defined between the fixed sensor and the main track and at least one sensitive element designed to detect the singularity, the fixed sensor being designed to deliver two square digital position signals in quadrature, wherein the signals are representative of a position of the encoder; a processing device for processing the signals, the device comprising counting means for determining, from an initial position, an actual position of the encoder, and means which, upon detection of the singularity, assigns the reference position as the initial position; and a comparison device for comparing the actual position of the encoder with a theoretical position of the encoder that corresponds to the applied setpoint position.