Active vibration reduction control apparatus and method of hybrid vehicle

1. An active vibration reduction control apparatus of a vehicle in which a first motor, a torsional damper, an engine, a connector, and a second motor are sequentially connected, the apparatus comprising:

a memory configured to store program instructions; and

a processor configured to execute the program instructions, the program instructions when executed configured to:

extract a vibration signal from the second motor;

generate a reference signal and a phase based on a rotation angle of the first motor;

determine a filter coefficient for minimizing a phase difference between the generated reference signal and the extracted vibration signal;

detect the phase difference between the reference signal and the vibration signal using a velocity signal of the first motor and the determined filter coefficient;

adjust a phase for compensating for delay;

generate an antiphase signal using the generated phase, the detected phase, and the adjusted phase; and

multiply the antiphase signal by a reference torque to generate antiphase torque and to combine the antiphase torque and command torque.

2. The apparatus according to claim 1 , wherein the programs when executed are further configured to:

measure a rotation angle of the second motor;

differentiate the measured rotation angle to calculate a velocity signal; and

filter the velocity signal calculated by the velocity calculator to extract a vibration signal.

3. The apparatus according to claim 1 , wherein the program instructions when executed are further configured to:

measure a rotation angle of the first motor;

multiply the measured rotation angle of the first motor by 2 to calculate a double rotation angle; and

generate the reference signal using the calculated double rotation angle.

4. The apparatus according to claim 3 , wherein the program instructions when executed are further configured to:

differentiate the measured rotation angle to calculate the velocity signal; and

detect the phase difference between the reference signal and the vibration signal using the calculated velocity signal and the determined filter coefficient.

5. The apparatus according to claim 1 , wherein the program instructions when executed are further configured to:

filter the generated reference signal using an updated filter coefficient;

calculate the phase difference between the generated reference signal and the extracted vibration signal extracted; and

calculate the filter coefficient for minimizing the calculated phase difference.

6. The apparatus according to claim 1 , wherein the program instructions when executed are further configured to:

generate a synchronization signal synchronized with the extracted vibration signal based on the generated phase generated, the determined phase, and the adjusted phase; and

generate an antiphase signal of the generated synchronization signal.

7. The apparatus according to claim 1 , wherein the reference torque is a pre-set constant.

8. The apparatus according to claim 1 , wherein the reference torque is a predetermined ratio of total torque applied to an engine torque.

9. An active vibration reduction control method of a vehicle in which a first motor, a torsional damper, an engine, a connector, and a second motor are sequentially connected, the method comprising:

extracting, by a controller, a vibration signal from the second motor;

measuring, by the controller, a rotation angle of the first motor using a first resolver;

generating, by the controller, a reference signal and a phase based on the measured rotation angle of the first motor;

determining, by the controller, a filter coefficient for minimizing a phase difference between the generated reference signal and the extracted vibration signal;

differentiating, by the controller, the measure rotation angle of the first motor to calculate a velocity signal;

detecting, by the controller, the phase difference between the reference signal and the vibration signal using the calculated velocity signal of the first motor and the determined filter coefficient;

adjusting, by the controller, a phase for compensating for delay;

generating, by the controller, an antiphase signal using the generated phase, the detected phase, and the adjusted phase; and

multiplying, by the controller, the antiphase signal by reference torque to generate antiphase torque and then combining the antiphase torque and command torque.

10. The method according to claim 9 , wherein the extracting of the vibration includes:

measuring, by the controller, a rotation angle of the second motor using a second resolver;

differentiating, by the controller, the measured rotation angle to calculate a velocity signal; and

filtering, by the controller, the calculated velocity signal to extract a vibration signal.

11. The method according to claim 9 , wherein the generating of the reference signal includes:

multiplying, by the controller, the measured rotation angle of the first motor by 2 to calculate a double rotation angle; and

generating, by the controller, the reference signal using the calculated double rotation angle.

12. The method according to claim 11 , wherein the generating of the reference signal includes generating a unit sine wave as the reference signal.

13. The method according to claim 9 , wherein the generating of the antiphase signal includes;

generating, by the controller, a synchronization signal synchronized with the extracted vibration signal based on the generated phase t, the determined phase, and the adjusted phase; and

generating, by the controller, an antiphase signal of the generated synchronization signal.

14. The method according to claim 9 , wherein the reference torque is a predetermined ratio of total torque applied to an engine torque.

15. The method according to claim 9 , wherein the reference torque is a pre-set constant.