Abstract
This work investigates the development of Shape Memory Alloy (SMA) actuators and a fiber-optic Mach- Zehnder interferometric dynamic motion sensor as components of an active vibration control system. The test set-up consisted of a graphite-epoxy flexible cantilever beam with distributed SMA wires and optical fibers attached along both sides. A constant amplitude dead-band control algorithm was used to provide a rate feedback force to actively control transient vibrations. The SMA actuators were also used to demonstrate static shape control. The settling time of the beam was reduced by more than a factor of 24 through the use of the SMA actuators and fiber optic dynamic motion sensor. Analytical models were developed for the integrated structure/actuator/sensor system which helped understand the dynamic effects and the results correlated well with the experimental results. This investigation demonstrated the feasibility ofusing SMA actuators and fiber optic dynamic motion sensor for control of flexible structures. The work described in this paper was sponsored by the Astronautics Laboratory AL(AFSC) as a part of the Advanced Composites with Embedded Sensors and Actuators (ACESA) program.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.