Feng, Guoping, Ruihong Jing, Jing Yao, Jianjun Zhao, Dongya Li, and Wenjian Zhou. “Analysis and Control of 2f Noise in an Ultra-High-Speed Permanent Magnet Synchronous Motor”. Sound & Vibration 59, no. 5 (October 28, 2025). Accessed April 20, 2026. https://ojs.acad-pub.com/index.php/SV/article/view/3701.