The PZT motor is a critical component for dual stage actuation (DSA) in hard disk drives. When voltage is applied to PZT motors, the suspension with the motors can provide slider off-track motion. Servo control has been focusing on the slider off-track motion because the control loop is designed based on the position error signal (PES) in the off-track direction. However, along with PZT off-track actuation, gimbal and slider vertical motion is inevitably introduced, which may increase head-disk interference risks and even cause lube moguls and ABS (air-bearing surface) wear. In this paper, we present an experimental methodology to investigate the relationship of slider vertical motion and DSA voltage injection.
- Information Storage and Processing Systems Division
Gimbal and Slider Vertical Motion Characterization for DSA Servo-Mechanical Design Improvement
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Lu, Y, Wang, X, & Liu, Y. "Gimbal and Slider Vertical Motion Characterization for DSA Servo-Mechanical Design Improvement." Proceedings of the ASME 2013 Conference on Information Storage and Processing Systems. ASME 2013 Conference on Information Storage and Processing Systems. Santa Clara, California, USA. June 24–25, 2013. V001T02A006. ASME. https://doi.org/10.1115/ISPS2013-2929
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