Abstract
Unobservable oscillations of the controlled variable of sampled-data positioning control systems may degrade the performance and reliability of the mechatronic products. The degree to which these oscillations are unobservable or observable depends on the sampling frequency and the oscillation frequency. In this paper, we study the relationship between the oscillation frequency and the sampling frequency. We define the index of unobservable position based on its rms amplitude to estimate the effect of the unobservable oscillations of mechanical resonances in positioning control systems. This index shows that a sampling frequency and a number of samples of measurement data for estimating the unobservable magnitude of oscillations are important parameters which designers must choose carefully. To show the use of the proposed index, we have analyzed unobservable magnitudes of oscillations for a head-positioning control system in a hard disk drive.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
