Design, modeling, and seek control of a voice-coil motor actuator with nonlinear magnetic bias Academic Article

abstract

• The research investigates the feasibility and trajectory tracking performance of an adaptive controller applied to a voice-coil motor actuator (VCMA) influenced by nonlinear magnetic bias. A magnetic bias feature on the actuator arm is designed to compensate for nonoperational shock. Because the resulting bias is nonlinear and uncertain, a model-based adaptive controller was developed to meet the seek performance requirements and simultaneously handle effects of the nonlinear bias. A VCMA with the bias feature was manufactured according to the design requirements. Extensive experiments were conducted to characterize the VCMA physical parameters and verify the controller performance. The effects of sample rate and bias modeling accuracy are also discussed. A representative sample of the results is presented. 2005 IEEE.

authors

• Pagilla, Prabhakar

published proceedings

• IEEE TRANSACTIONS ON MAGNETICS

author list (cited authors)

• Ratliff, R. T., & Pagilla, P. R.

citation count

• 21

complete list of authors

• Ratliff, RT||Pagilla, PR

publication date

• June 2005

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Transactions on Magnetics  Journal

keywords

• Adaptive Control
• Bias
• Disk Drive
• Projection
• Seek Control

Digital Object Identifier (DOI)

• 10.1109/TMAG.2005.847633

start page

• 2180

end page

• 2188

volume

• 41

issue

• 6

URL

• http://dx.doi.org/10.1109/tmag.2005.847633