ELECTRICAL POWER STEERING SYSTEM FOR A MOTOR VEHICLE

摘要

The invention relates to an electrical power steering system for a motor vehicle. Said system comprises a rack (3) actuator (4) and a sensor (7) for measuring the torque applied to the steering wheel (2) by the driver, the actuator and the sensor being arranged on the steering column (1), respectively between the steering wheel (2) and the rack (3), and between the actuator (4) and the steering wheel (2). The inventive system comprises means for developing (9) a final assistance torque of the electrical power steering, which is adapted in such a way as to simulate an identical localisation of the rack (3) actuator (4) and the torque measuring sensor (7) on the steering column (1), such that the Bode diagram phase representing the operation of the system is essentially nil at the two main frequencies of the mechanical resonance of the system.