APPARATUS AND METHOD FOR REDUCING VIBRATIONS OF ELECTRONIC POWER STEERING APPARATUS

• US 20170174255A1
• Filed: 12/17/2015
• Published: 06/22/2017
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: HL Mando Corporation (Halla Holdings Corporation)
• Original Assignee: Mando Corporation (Halla Holdings Corporation)
• Inventors: KIM, Hyeok
• Granted Patent: US 10,882,551 B2
• Time in Patent Office: Days
• CPC Class Codes: B62D 5/0472 for damping vibrations
• CPC Class Codes: B62D 6/06 responsive only to vehicle vibration dampening arrangements steering dampers for cycles B62K21/08
• CPC Class Codes: B62D 6/10 characterised by means for sensing or determining torque

Abstract

An apparatus for reducing vibrations of an electronic steering apparatus includes a vibration filter unit which extracts a steering vibration signal that is a radio frequency component of a torque signal transmitted from a torque sensor, a signal generation unit which generates a reference signal based on one of a wheel speed and a wheel vibration number transmitted from a sensor mounted in a vehicle, an adaptive filter which receives the reference signal generated by the signal generation unit and generates a current control signal, a motor which receives the current control signal, and an error unit which stores a steering vibration component value generated based on the steering vibration signal and the current control signal applied to the motor. Here, the steering vibration component value stored in the error unit is provided as feedback to the adaptive filter to update the adaptive filter with a coefficient.

Claims

1. An apparatus for reducing vibrations of an electronic steering apparatus, comprising:

a vibration filter unit which extracts a steering vibration signal that is a radio frequency component of a torque signal transmitted from a torque sensor;

a signal generation unit which generates a reference signal based on one of a wheel speed and a wheel vibration number transmitted from a sensor mounted in a vehicle;

an adaptive filter which receives the reference signal generated by the signal generation unit and generates a current control signal;

a motor which receives the current control signal; and

an error unit which stores a steering vibration component value generated based on the steering vibration signal and the current control signal applied to the motor, wherein the steering vibration component value stored in the error unit is provided as feedback to the adaptive filter to update the adaptive filter with a coefficient.

2. The apparatus of claim 1, comprising a gain unit which receives the current control signal and modifies a level and a phase of the current control signal.

3. The apparatus of claim 1, wherein the adaptive filter is formed as a finite impulse response filter (FIR).

4. A method of reducing vibrations of an electronic steering apparatus, the method comprising:

sensing a steering vibration signal while a vehicle is driven;

generating a reference signal based on at least one of a wheel speed and a wheel vibration number transmitted from a sensor of the vehicle;

generating a current control signal by inputting the reference signal into an adaptive filter;

generating a steering vibration component value based on the steering vibration signal by applying the current control signal to a motor; and

providing the steering vibration component value as feedback to the adaptive filter.

5. The method of claim 4, wherein the sensing of the steering vibration signal comprises:

sensing, by a torque sensor, a torque signal; and

extracting the steering vibration signal by inputting the torque signal into a vibration filter unit.

6. The method of claim 4, wherein at least one of a level and a phase of the current control signal is modified by a gain unit and is applied to the motor.

7. The method of claim 4, wherein the providing feedback to the adaptive filter comprises:

storing the steering vibration component value in an error unit; and

providing the steering vibration component value stored in the error unit as feedback to the adaptive filter to update the adaptive filter with the coefficient.

8. The method of claim 7, wherein the adaptive filter is formed as an FIR filter.