US 9,809,247 B2
Motor control current sensor loss of assist mitigation for electric power steering
Julie A. Kleinau, Bay City, MI (US); Prerit Pramod, Saginaw, MI (US); Dennis B. Skellenger, Saginaw, MI (US); and Selva Kumar Sengottaiyan, Saginaw, MI (US)
Filed by Steering Solutions IP Holding Corporation, Saginaw, MI (US)
Filed on Jan. 26, 2016, as Appl. No. 15/6,901.
Claims priority of provisional application 62/109,698, filed on Jan. 3, 2015.
Prior Publication US 2016/0229449 A1, Aug. 11, 2016
Int. Cl. B62D 5/04 (2006.01); H02P 23/00 (2016.01)
CPC B62D 5/0484 (2013.01) [B62D 5/049 (2013.01); B62D 5/0463 (2013.01); H02P 23/0004 (2013.01)] 19 Claims
OG exemplary drawing
1. A power steering system comprising:
a torque modifier module that generates a modified torque command in response to a current sensor fault, a magnitude of the modified torque command changes over a time period; and
a feedforward selection module that applies a dynamic feedforward compensation to a motor current command, the dynamic feedforward compensation based on motor inductance and motor-circuit resistance, thereby generating a motor voltage that is applied to a motor of the power steering system, the dynamic feedforward compensation modifies a frequency response of the power steering system, the motor current command is based on the modified torque command.