A large displacement, high frequency, underwater microelectromechanical systems actuator
- Author(s): Hoelzle, DJ;
- Chan, CK;
- Scott, MB;
- Lake, MA;
- Rowat, AC
- et al.
Published Web Locationhttps://doi.org/10.1063/1.4905385
Here, we demonstrate an in situ electrostatic actuator that can operate underwater across a wide range of displacements and frequencies, achieving a displacement of approximately 10-μm at 500-Hz and 1-μm at 5-kHz; this performance surpasses that of existing underwater physical actuators. To attain these large displacements at such high speeds, we optimized critical design parameters using a computationally efficient description of the physics of low quality (Q) factor underwater electrostatic actuators. Our theoretical model accurately predicts actuator motion profiles as well as limits of bandwidth and displacement.