Dynamic Force Measurement of a Head Arm Assembly of a Hard Disk Drive by Numerical Analysis and Experiments

• Published in: IEEE transactions on magnetics Vol. 45; no. 11; pp. 5034 - 5037
• Main Authors: Bin Gu, Dongwei Shu, Fujii, Y., Baojun Shi
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.11.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustic measurements; Aerodynamics; Assembly; Computer simulation; Cross-disciplinary physics: materials science; rheology; Disk drives; Dynamic force; Dynamic tests; Dynamics; Electric shock; Exact sciences and technology; finite element; Finite element method; Finite element methods; Force measurement; hard disk drive (HDD); Hard disks; Impact loads; Levitation; levitation mass method (LMM); Magnetic heads; Magnetism; Materials science; Mathematical models; Numerical analysis; Other topics in materials science; Physics; Finite element method; Hard discs; Disc drives; Force measurement; levitation mass method (LMM); finite element; hard disk drive (HDD); Modelling; Dynamic force; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2009.2029598

In this paper, dynamic forces of a head arm assembly (HAA) of a hard disk drive (HDD) against an impact load and in free oscillation after an impact load are obtained by means of finite element analysis (FEA) and by carrying out experiments using a modified levitation mass method (LMM). A good correlation between the experimental and numerical results is achieved. The effectiveness of both FE simulation and LMM method in measuring the minute dynamic forces involved in HDDs is evaluated.