A voice-coil motor actuator system is designed to perform a unique disk drive ramp load/unload operation. The design eliminates the necessity of increased material requirements common in ramp load disk drives. Therefore, disk drives with lower cost, higher performance actuators can realize the linear shock protection benefits of ramp loading. This study offers a complete, systematic design procedure together with required analysis for manufacture of a commutational ramp load/unload drive. The actuator is designed and optimized to meet specific move-time performance requirements. When used for ramp load/unload, however, there exists a location where input current has no influence on actuator motion. An input polarity reversal is required within the uncontrollable region to sustain the direction of actuator motion. A magnetic, restorative bias is designed that prevents the actuator from resting in the uncontrollable region while providing resistance to rotational shock effects. A state trajectory is designed that, when tracked, moves the actuator through the uncontrollable set for a successful load onto the disk at the desired load velocity. A ramp load controller is designed to track the trajectory and handle the nonlinear effects from bias and friction torque. The unique disk drive is manufactured and experiments are performed to demonstrate effectiveness of the complete design strategy.
Skip Nav Destination
e-mail: pagilla@ceat.okstate.edu
Article navigation
March 2007
Research Papers
Design and Analysis of a Disk Drive Actuator for Commutational Ramp Loading
Ryan T. Ratliff,
Ryan T. Ratliff
The Boeing Company
, St. Louis, MO 63166
Search for other works by this author on:
Prabhakar R. Pagilla
Prabhakar R. Pagilla
School of Mechanical and Aerospace Engineering,
e-mail: pagilla@ceat.okstate.edu
Oklahoma State University
, Stillwater, OK74078
Search for other works by this author on:
Ryan T. Ratliff
The Boeing Company
, St. Louis, MO 63166
Prabhakar R. Pagilla
School of Mechanical and Aerospace Engineering,
Oklahoma State University
, Stillwater, OK74078e-mail: pagilla@ceat.okstate.edu
J. Mech. Des. Mar 2007, 129(3): 346-360 (15 pages)
Published Online: February 27, 2006
Article history
Received:
July 18, 2005
Revised:
February 27, 2006
Citation
Ratliff, R. T., and Pagilla, P. R. (February 27, 2006). "Design and Analysis of a Disk Drive Actuator for Commutational Ramp Loading." ASME. J. Mech. Des. March 2007; 129(3): 346–360. https://doi.org/10.1115/1.2406106
Download citation file:
39
Views
Get Email Alerts
Cited By
Related Articles
Commutational Output Feedback Control for Disk Drive Ramp Loading
J. Dyn. Sys., Meas., Control (March,2008)
Gait Phase-Based Control for a Rotary Series Elastic Actuator Assisting the Knee Joint
J. Med. Devices (September,2011)
Automated Part Centering With Impulse Actuation
J. Manuf. Sci. Eng (February,2010)
Design and Analysis of a Spherical Continuously Variable Transmission
J. Mech. Des (March,2002)
Related Proceedings Papers
Related Chapters
Materials
Design and Application of the Worm Gear
QP Based Encoder Feedback Control
Robot Manipulator Redundancy Resolution
Research on an Electric Loading System without Inertia Disk for Actuators
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3