MOTOR CONTROL CURRENT SENSOR LOSS OF ASSIST MITIGATION FOR ELECTRIC POWER STEERING
First Claim
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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, 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.
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Abstract
A power steering system includes 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. The power steering system also includes a feedforward selection module that applies a dynamic feedforward compensation to a motor current command, 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.
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20 Claims
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1. A power steering system comprising:
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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, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power steering system comprising:
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a stability compensator selector module that selects a stability compensator of a steering torque control loop of the power steering system when a current sensor fault is detected, the stability compensator generates a compensated torque command; and a torque modifier module that generates a modified torque command from the compensated torque command in response to a current sensor fault, a magnitude of the modified torque command changes over a time period, a motor voltage that is applied to a motor of the power steering system is based on the modified torque command. - View Dependent Claims (9, 10, 11, 12, 14)
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15. A method for controlling a power steering system comprising:
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generating a modified torque command in response to a current sensor fault, a magnitude of the modified torque command changes over a time period; and applying a dynamic feedforward compensation to a motor current command, 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. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification