YUAN Gang, WANG Dai-hua, LI Shi-dong. Piezoelectric fast steering mirror with large excursion angle[J]. Editorial Office of Optics and Precision Engineering, 2015,23(8): 2258-2264
YUAN Gang, WANG Dai-hua, LI Shi-dong. Piezoelectric fast steering mirror with large excursion angle[J]. Editorial Office of Optics and Precision Engineering, 2015,23(8): 2258-2264 DOI: 10.3788/OPE.20152308.2258.
Piezoelectric fast steering mirror with large excursion angle
To extend the excursion angle of the Piezoelectric Ceramic Stack Actuator (PCSA) based fast steering mirror (FSM)
a piezoelectric FSM with a large excursion angle and a fixed rotation axis was proposed and explored. The output displacement of the PCSA was amplified by a bridge-type flexure hinge and applied to a mirror to generate a fixed axis deflection with the large excursion angle. On this basis
the configuration and the corresponding output equation of the piezoelectric FSM were established
and the characteristics of the FSM
including the maximum excursion angle
the maximum stress
and the natural frequency
were analyzed through theoretical derivation and finite element simulation. Finally
the principle and characteristics of the proposed piezoelectric FSM were validated through experiments and tests. The results show that the output equation of the piezoelectric FSM estimates exactly the mechanical defection angles of the piezoelectric FSM based on the output displacement of the PCSA and improves the design efficiency. Moreover
the developed piezoelectric FSM provides a mechanical excursion angle larger than 3°with natural frequency of 180 Hz
which satisfies the requirements of the high-speed image stabilization system for the large excursion angle and rapid response.
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references
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