Home List of Titles A generalized disturbance filter design and its applications to a spinstand servo system with microactuator
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- A generalized disturbance filter design and its applications to a spinstand servo system with microactuator
- Zheng, Jinchuan; Guo, Guoxiao; Wang, Youyi; Fu, Minyue
- Narrow-band position error at mid-frequencies around the open-loop crossover frequency can not be effectively reduced using a conventional peak filter, because the attenuation of sensitivity gains has to compromise with the associated decrease of phase margin. This paper presents a general second-order filter that is applicable to reject narrow-band disturbances at any frequency range. The filter zero is designed to minimally degrade the closed-loop system stability and obtain a smooth sensitivity curve around the disturbance frequency. A nonlinear optimization procedure is developed to select the filter parameters such that the statistical position error is minimized. Experimental results of a PZT-actuated head positioning control system on spinstand demonstrate that the add-on filter can further reduce the mid-frequency PES NRRO by 8% and preserve the stability margin of the original control system.
- Publication type
- Conference paper
- Proceedings of the 9th International Conference on Control, Automation, Robotics and Vision (ICARCV 2006), Singapore, 05-08 December 2006
- Publication year
- Closed loop control systems; Error analysis; Hard disk drives; Narrow band disturbance filter; Nonlinear analysis; Optimisation; Piezoelectric actuators; PZT microactuators; Servo control; Servomechanisms; Spinstand
- 9781424403424, 1424403421
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