title: Note: A component-level frequency tunable isolator for vibration-sensitive chips using SMA beams.
abstract: This note presents a component-level frequency tunable isolator for vibration-sensitive chips. The isolator employed 8 U-shaped shape memory alloy (SMA) beams to support an isolation island (used for mounting chips). Due to the temperature-induced Young's modulus variation of SMA, the system stiffness of the isolator can be controlled through heating the SMA beams. In such a way, the natural frequency of the isolator can be tuned. A prototype was fabricated to evaluate the concept. The test results show that the natural frequency of the isolator can be tuned in the range of 64 Hz-97 Hz by applying different heating strategies. Moreover, resonant vibration can be suppressed significantly (the transmissibility decreases about 65% near the resonant frequency) using a real-time tuning method.
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Ding
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Di
authors.initials: D
authors.lastname: Wu
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Junlei
authors.initials: J
authors.lastname: Qi
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Ruixin
authors.initials: R
authors.lastname: Wang
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Siwei
authors.initials: S
authors.lastname: Lu
authors.affiliation: School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Yan