CPC B60L 15/20 (2013.01) [G10K 15/04 (2013.01); H03G 3/3005 (2013.01); H04R 3/04 (2013.01); B60L 2250/26 (2013.01); B60L 2260/26 (2013.01); B60L 2270/42 (2013.01); H03G 2201/103 (2013.01); H04R 1/025 (2013.01); H04R 2499/13 (2013.01)] | 19 Claims |
1. A method for controlling a tone of an electric vehicle (EV) based on motor vibration, the method comprising:
calculating, by a signal processing controller, an order component from a vibration signal of a EV motor;
extracting, by the signal processing controller, an Nth order component with the greatest linearity for motor output torque among the calculated order component;
calculating, by the signal processing controller, an order frequency by transforming revolutions per minute (RPM) of the EV motor into a frequency; and
setting, by the signal processing controller, an EV mode tone by applying a vibration level of the Nth order component to a level of the order frequency to be output and rearranging the order component;
wherein the extraction of the Nth order component includes extracting the first order component with a determination coefficient (R2) greater than or equal to 90 percent.
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