Multi-frequency dynamic absorber for improved spacecraft comfort during the launch phase

Mastroddi, Franco; Facchini, Gianluca; Gaudenzi, Paolo

doi:10.1007/s12567-012-0026-1

Cited by 1 publication

(1 citation statement)

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“…Isolation in the axial and lateral directions was achieved by the bending behavior of the titanium flexure and the shearing behavior of the damping unit, respectively. Mastroddi et al [9] proposed a multi-frequency dynamic absorber using a two-spring mechanism arranged in each axial and lateral direction. These mechanisms are connected with the oscillating mass for tuning the specific target frequency for the spacecraft during the launch phase.…”

Section: Introductionmentioning

confidence: 99%

High Damping Passive Launch Vibration Isolation System Using Superelastic SMA with Multilayered Viscous Lamina

et al. 2021

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Whole-spacecraft launch-vibration isolation systems are attractive for achieving the goal of better, faster, cheaper, and lighter small satellites by reducing the design-load and vibration-test specifications for on-board components. In this study, a three-axis passive launch-vibration isolation system, based on superelastic shape memory alloy (SMA) technology, was developed to significantly attenuate the dynamic launch loads transmitted to a small satellite. This provides a superior damping characteristic, achieved by superelastic SMA blades stiffened by multilayered thin plates with viscous lamina adhesive layers of acrylic tape. The basic characteristics of the proposed isolation system with various numbers of viscoelastic multilayers were obtained through a static load test. In addition, the effectiveness of the design was validated through a launch environment simulating sine and random vibration tests.

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Section: Introductionmentioning

confidence: 99%