Design of a Mechanical Tunable Resonant Fast Steering Mirror

Abstract

This work present the design, simulation and control of a mechanical tunable resonant fast steering mirror (FSM). The proposed system design enables to tune each of the two hybrid reluctance actuated system axis individually, such that the power consumption can be improved. By adapting the effective length of the flexure with clamps, the stiffness of each system axis can be adjusted. The position of the clamps is varied with stepper motors, such that the resonance frequency can be tuned between 138 Hz and 263 Hz. A tuning algorithm automatically adapts the position of the clamps according to the selected scan trajectory, such that the FSM is operated with maximum efficiency. Experimental results show, that the power consumption can be enhanced through the mechanical tuning of the resonance frequency by a factor of 13.83 as compared to a conventional FSM.