Single piezoelectric ceramic stack actuator based fast steering mirror with fixed rotation axis and large excursion angle

• The proposed FSM can realize large excursion angle with fixed rotation axis.
• The established output equation can accurately estimate the mechanical excursion angle of the proposed FSM.
• The relationships between the mechanical excursion angle and the configuration parameters of the FSM are investigated.

To meet the development demands of the stare imaging system, a single piezoelectric ceramic actuator (PCSA) based fast steering mirror (FSM) with fixed rotation axis and large excursion angle is proposed and designed. The statics model and dynamical model of the FSM are established and analyzed. On this basis, a parameter optimization method is proposed and applied to determine the configuration parameters of the designed FSM. The working principle, excursion angle, and natural frequency of the FSM are validated through theoretical estimating, finite element analyzing by ANSYS, and experimental testing, respectively. The experimental results show that the developed FSM can provide a mechanical excursion angle larger than 3° with natural frequency of 180.4 Hz, and the mechanical excursion angle and the natural frequency can be estimated by the established mathematical models accurately.