Elektrisches Servolenksystem

Electric power steering system

Système de direction fonctionnant à l'énergie électrique

Abstract

There is provided an electric power steering system that makes it possible to reduce an uncomfortable feeling given to a driver even when a detected steering torque value is held. The controller (5) computes a detected steering torque value (τ) based on the detection signal (Sτ), and provides compensation based on a compensation value to a basic current command value based on the detected steering torque value (τ) to compute a current command value (I*). The controller (5) executes feedback control for causing a current value of the motor (30) to follow the current command value (I*). The controller (5) executes normal control in which the detected steering torque value (τ) is periodically updated and backup control in which periodic updating of the detected steering torque value (τ) and holding of the detected steering torque value (τ) are alternately executed. The controller (5) switches compensation value between a compensation value used during execution of the normal control and a compensation value used during execution of the backup control.

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Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    EP-1134147-A2September 19, 2001Koyo Seiko Co., Ltd.Système de commande de direction assistée électrique
    EP-2266862-A2December 29, 2010JTEKT CorporationElektrisches Servolenksystem
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