Open Science Research Excellence
Chaoraingern J. and  Trisuwannawat T. and  Numsomran A.,  PID Controller Design for Following Control of Hard Disk Drive by Characteristic Ratio Assignment Method.   journal   = {International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology. November 2009, vol. 35(11). 1909 - 1915[viewed 21 February 2019]. Available from: http://waset.org/publications/5109.