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- W2012340975 abstract "This paper presents a woodpecker-inspired shock isolation (SI) using a microgranular bed to protect micromachined electronic devices (MEDs) for high-g military applications where mechanical excitations reach up to tens of thousands of gs and several hundreds of kHz. The shock isolating phenomenon in the microgranular bed within a metal housing, biomimetically inspired from a spongy bone within a skull of the woodpecker, controls unwanted high-frequency mechanical excitations so that their adverse effects on the embedded MEDs are kept within acceptable limit. The microgranular bed composed of close-packed microglass beads reduces the mechanical excitations transmitted to the MEDs through kinetic energy absorption. Two kinds of tests, a laboratory test and a 60 mm air-gun test, have been made. The laboratory test using a vibration exciter up to 25 kHz has demonstrated that the cut-off frequency (2.2–15.8 kHz) and roll-off steepness (−155.0 to −78.7 dB decade−1) are inversely proportional to the diameter of the close-packed microglass beads (68–875 µm), whereas the vibration absorptivity (0.23–0.87) is proportional. The 60 mm air-gun test under high-g environments of up to 60 000 g has verified that the woodpecker-inspired SI is superior in improving the shock survivability of the MEDs to the conventional one using hard resin." @default.
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- W2012340975 date "2008-12-18" @default.
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- W2012340975 title "Woodpecker-inspired shock isolation by microgranular bed" @default.
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- W2012340975 doi "https://doi.org/10.1088/0022-3727/42/3/035501" @default.
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