Apparatus and method for active vibration control of hybrid electric vehicle

An apparatus for active vibration control of a hybrid electric vehicle including an engine and a motor, the apparatus comprising:

• a position sensor configured to detect position information of the engine or the motor;
• and
• a controller configured to:
• determine a reference angle signal based on the position information detected by the position sensor,
• generating a reference angle corresponding to the reference angle signal,
• set a period for applying a fast Fourier transform (FFT) based on an engine attribute of the engine,
• after the period for applying the FFT is set, analyze a FFT signal based on performing the FFT on an engine speed or a motor speed during the period, the FFT signal comprised of a plurality of frequency components,
• determine a reference spectrum covering the plurality of frequency components based on the engine speed and an engine load of the engine,
• extract vibration components from the FFT signal based on the comparison of the FFT signal with the reference spectrum,
• select a removal object frequency from the extracted vibration components,
• determine a reference signal by performing an inverse FFT on the selected removal object frequency,
• determine a basic amplitude ratio based on the engine speed and the engine load, and determine an adjustable rate based on the engine load, and
• perform active vibration control on each of the plurality of frequency components by summing values calculated from the basic amplitude ratio, the adjustable rate, an engine torque, and the reference signal.