ADAPTATION OF A DRIFT GAIN ACCORDING TO STEERING WHEEL TORQUE IN ORDER TO IMPROVE THE FEEL OF A POWER-STEERING SYSTEM

A power-steering device includes a steering wheel and an assistance motor controlled by a controller which uses at least one closed-loop control law ensuring an adjustment of the steering wheel torque, the controller including at least one feedback arm which calculates a drift component by measuring...

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Bibliographic Details
Main Authors MOULAIRE, Pascal, GAUDIN, Serge, MICHELIS, André
Format Patent
LanguageEnglish
Published 24.06.2021
Subjects
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
MOTOR VEHICLES
PERFORMING OPERATIONS
TRAILERS
TRANSPORTING
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Summary:A power-steering device includes a steering wheel and an assistance motor controlled by a controller which uses at least one closed-loop control law ensuring an adjustment of the steering wheel torque, the controller including at least one feedback arm which calculates a drift component by measuring or assessing an actual force parameter corresponding to the actual steering wheel torque, by next calculating a time drift value of the actual force parameter, and then multiplying the time drift value by a drift gain, wherein the controller uses three-dimensional cartography to adjust the drift gain according to a portion of the actual force parameter and the longitudinal velocity of the vehicle, according to a first domain, referred to as "parking domain", which extends from a longitudinal vehicle velocity of zero to a predetermined longitudinal velocity threshold, and a second domain, referred to as "driving domain", which extends beyond the longitudinal velocity threshold.
Bibliography:Application Number: US201816650416