Analysis of rod vibration on a dual-slider smooth impact drive mechanism for a compact zoom lens system

In our previous research, dual-slider smooth impact drive mechanism (SIDM) actuation method was developed for the purpose of driving two afocal zoom lenses in a compact size. For a fast zoom and auto-focus (AF) function, a fast slider velocity is required, and it leads to a high frequency input voltage profile. However, the high frequency piezoelement operation transfers a high force to a driving rod, and it generates a considerable bending vibration which can change system parameters related to the slider velocity and the dualslider drive. In this paper, the effects of bending vibration on a friction and a transmissibility of rod are analyzed by simulation and experiments. As a result, the friction and the transmissibility were generally reduced at high frequency region, and at resonant frequencies having considerable vibration amplitude, great friction reductions and recoveries of transmissibility were observed.