Title :
State truncation error in disk drive servo systems
Author :
Zhu, Bo ; Sun, Yu ; Guo, Lin ; Tomizuka, Masayoshi
Author_Institution :
Dept. of Mech. Eng., California Univ., Berkeley, CA, USA
Abstract :
Cost-effective fixed-point digital signal processors (DSP) are widely used in disk drive servo systems. However, the state truncation error (STE) of fixed-point DSP is by far an ignored source of the position error signal (PES). This paper identifies and models the STE as noise sources. Frequency domain analysis leads to some general methods to minimize the effect of STE in PES
Keywords :
disc drives; frequency-domain analysis; hard discs; noise; roundoff errors; servomechanisms; PES; STE; cost-effective fixed-point digital signal processors; disk drive servo systems; fixed-point DSP; frequency domain analysis; noise sources; position error signal; state truncation error; Analog-digital conversion; Control systems; Digital control; Digital signal processing; Digital signal processors; Disk drives; Finite wordlength effects; Noise figure; Quantization; Servomechanisms;
Conference_Titel :
American Control Conference, 2000. Proceedings of the 2000
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-5519-9
DOI :
10.1109/ACC.2000.879130
