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US 7,002,314 B2Granted
Electric brake system
AssigneeAdvics Co., Ltd.
InventorsHaruo Arakawa, Takahisa Yokoyama, Takayuki Takeshita
Life of this patent
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Abstract
The present invention provides an electric brake system which detects the occurrence of overshooting, and corrects a feedback gain in the PID feedback control at overshooting. For example, it increases a differential gain Kd. Accordingly, a damping force increases from the time when the overshooting is determined, and after the overshooting, the output of an electric brake moderately decays to get closer to the target value with the passage of time.
Claims20
An electric brake system using an electric motor to operate an electric brake, comprising:
- a target brake force setting portion for setting a target brake force corresponding to the amount of operation of a brake operating member;
- a target value setting portion for setting a target value for an output of said electric brake for generating the target brake force set by said target brake force setting portion;
- a feedback control portion for executing a feedback control for providing feedback on an actual control variable for said electric brake, and minimizing a difference between said target value and the actual control variable;
- overshoot detection portions for operating said electric brake to produce the output of said target value from said electric brake, and detecting occurrence of overshooting when the actual control variable for the electric brake overshoots said target value;
- and
- a feedback control variable correction portion for correcting a feedback control variable in said feedback control portion when said overshoot detection portion detects the overshooting.
3 more elements
Dependencies are inferred from the claim text.