Izvorni znanstveni članak
https://doi.org/10.7305/automatika.54-3.368
Design of Normal Force Control System for a Pin-on-Disk Tribometer including Active and Passive Suppression of Vertical Vibrations
Danijel Pavković
orcid.org/0000-0001-8045-5109
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ulica Ivana Lučića 1, HR-10000, Zagreb, Croatia
Nenad Kranjčević
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ulica Ivana Lučića 1, HR-10000, Zagreb, Croatia
Milan Kostelac
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ulica Ivana Lučića 1, HR-10000, Zagreb, Croatia
Sažetak
This paper presents the design of a computer-controlled pin-on-disk tribometer for friction characterization of various friction sliding pairs. The tribometer setup comprises two high-bandwidth servomotors for the control of the rotating disk and the normal load-related spindle drive, as well as a high-precision tri-axial piezoelectric force sensor for normal and tangential forces measurement. Since the spindle drive system is characterized by notable compliance effects, the normal force cascade control system is designed with the aim of vertical vibrations active damping. In order to compensate for the unevenness of the rotating disk surface and associated high-level perturbations in the specimen normal force, the normal force control system is extended with a feedforward compensator of the disk unevenness disturbance, and a dedicated leaf spring suspension system is designed. The effectiveness of the proposed system of vertical vibrations damping is verified experimentally.
Ključne riječi
Vibration suppression; Normal force control; Pin-on-disk tribometer
Hrčak ID:
110179
URI
Datum izdavanja:
3.10.2013.
Posjeta: 3.611 *