title: High speed single- and dual-stage vertical positioners.
abstract: This article presents a high-speed single- and dual-stage vertical positioners for applications in optical systems. Each positioner employs a unique end-constraint method with orthogonal flexures to preload a piezoelectric stack actuator. This end-constraint method also significantly increases the first mechanical resonance frequency. The single-stage positioner has a displacement range of 7.6 μm and a first resonance frequency of 46.8 kHz. The dual-stage design consists of a long-range slow-stage and a short-range fast-stage. An inertial counterbalance technique was implemented on the fast-stage to cancel inertial forces resulting from high-speed motion. The dual-stage positioner has a combined travel range of approximately 10 μm and a first evident resonance frequency of 130 kHz.
authors: School of Electrical Engineering and Computer Science at The University of Newcastle, Callaghan, NSW, Australia.
authors: Yuen K
authors: YK
authors: Yong
authors: School of Electrical Engineering and Computer Science at The University of Newcastle, Callaghan, NSW, Australia.
authors: Sachin P
authors: SP
authors: Wadikhaye
authors: School of Electrical Engineering and Computer Science at The University of Newcastle, Callaghan, NSW, Australia.
authors: Andrew J
authors: AJ
authors: Fleming