US Patent Issued to AAC Acoustic Technologies (Shanghai) on June 17 for "Nonlinear system modeling method for motor and modeling device" (Chinese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,333,221, issued on June 17, was assigned to AAC Acoustic Technologies (Shanghai) Co. Ltd. (Shanghai).

"Nonlinear system modeling method for motor and modeling device" was invented by Zhongqing Cao (Shenzhen, China), Zheng Xiang (Shenzhen, China) and Xuan Guo (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a motor nonlinear system modeling method including steps of: obtaining a chirp signal of a first frequency band, and a chirp signal of a second frequency band; exciting the motor by using the chirp signal; obtaining a higher harmonic frequency response of the first frequency band; exciting the motor by using the c...