Steering control apparatus
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United States of America Patent
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Feb 20, 2018
Issued Date -
N/A
app pub date -
May 30, 2014
filing date -
May 30, 2014
priority date (Note) -
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Abstract
A steering control apparatus is obtained which includes an assist instruction-value correction device for calculating, based on a result of a friction transition-state determination device, an assist correction value in order to obtain an assist instruction-value after its correction being made by correcting a basic assist instruction-value so that a hysteresis width of steering torque increases at the time of turn-back steering, and an electric current driving device for driving a motor so that an electric current of the motor is coincident with an electric current instruction-value therefor after its correction being made on the basis of the assist instruction-value after its correction being made; and the friction transition-state determination device determines the friction transition-state by integrating a differential value of steering-shaft reaction torque using an integrator having a limiting function to an upper or lower limit value defined in advance.
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