Vibration minimized trajectory design for information devices

State Space Disturbance Compensation for Robust Fast Servo Track Writer Seek Control*

“…Preprints of the 18th IFAC World Congress Milano (Italy) August 28 -September 2, 2011 Okuyama et al [2005], Hirata and Hasegawa [2007]) and for a minimum phase delay (see e.g. Tomizuka [1987]).…”

“…A reference profile can be designed to minimize residual vibration (see e.g. Mizoshita et al [1996], Okuyama et al [2005], Hirata and Hasegawa [2007]). It is also possible to reduce residual vibration by minimizing the rate of control input (see e.g.…”

Design of robust controller for high performance servo track writer

“…This is a summary of related work [4,5,11]. First, energy minimization is performed considering input magnitude constraints, frequency constraints.…”

“…There are many approaches: the SMART control method [2] for designing a trajectory that minimizes vibration at the seek control of the HDD, method using band reject filter (BRF) to make sure that control input does not have energy at certain frequency bands [3], and a method using LMI constraint to limit energy of the frequency band that the resonance exists generating control input [4,5].…”