1Jong-hun Kim,Dae woo Lee,Kyeum-rae Cho,et al. Developmentof an electro-optical system for small UAV[ J]. Aerospace Scienceand Technology, 2010,14: 505 -511.
2Jaeyoung Kang. The onset condition of friction noise in ball jointunder concentric loading [J]. Applied Acoustics, 2015, 89:57 -61.
3Jaeyoung Kang. Theoretical model of ball joint squeak [ J]. Journalof Sound and Vibration, 2011,330: 5490 -5499.
