Abstract
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.
Highlights
Aerospace 2021, 8, 201. https://The start of the New Space paradigm has changed the development philosophy of the worldwide space-engineering field
A three-axis passive whole-spacecraft vibration isolator (WSVI) was developed to significantly attenuate the dynamic launch loads transmitted to a small satellite
To achieve a high damping capability, the proposed WSVI applied two technical design concepts which are to use the superelasticity of the shape memory alloy (SMA) material and the other is to apply multilayered thin plates with viscous lamina tapes on the SMA blades
Summary
Aerospace 2021, 8, 201. https://The start of the New Space paradigm has changed the development philosophy of the worldwide space-engineering field. New Space refers to the recent commercialization of the space sector, which is mainly led by private industries, rather than government-funded organizations. These industries are driving a better, faster, cheaper, and lighter spacedevelopment paradigm [1,2,3,4]. The total launch cost can be reduced as multiple small satellites are launched together. These advantages make the small-satellite platform attractive for various challenging missions that require high temporal system performance, e.g., real-time remote sensing, global internet services, and high-speed communications [4]
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