Shock and thermal protection for smart munitions
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorMatthew A. Cerniway
Life of this patent
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Abstract
An isolation assembly for use with a munition includes a housing extending along a central axis and defining a cavity. A shuttle is at least partially within the cavity with an air gap between the shuttle and the housing, where the shuttle is configured to contain one or more electronic components. An isolation assembly in the gap between the shuttle and the housing includes an elastomeric isolator and one or more seals. The isolation assembly retains the shuttle in the cavity with six degrees of freedom.
Claims19
An isolation assembly for shock and thermal mitigation comprising:
- a housing of size, shape and material to support integration within a translated vehicle;
- an absorber assembly located inside the housing and adapted to mitigate transmitted shock and thermal loads, the absorber assembly comprising:
- a shuttle of size, shape, and material to internally support electronic components and externally to provide multi-axis compression;
- a plurality of disks of viscoelastic material contained between an inner surface of the housing and an outer surface of the shuttle, the plurality of disks suspending the shuttle and allowing the shuttle to translate with six degrees of freedom via a non-linear spring rate resulting from compression of the viscoelastic material in which a modulus of the viscoelastic material is converted from an elastic modulus to a bulk modulus;
- wherein the housing has a resonant frequency at least one order of magnitude below a resonant frequency of the one or more electronic components.
An electronic assembly for a munition, the assembly comprising:
- a housing extending along a central axis and defining a cavity;
- a shuttle retained within the cavity with a gap between the shuttle and the housing;
- one or more electronic components in the shuttle;
- a plurality of elastomeric isolators in the gap between the shuttle and the housing, the plurality of elastomeric isolators extending circumferentially around the shuttle and retaining the shuttle with six degrees of freedom;
- and
- one or more seals for individual isolators of the plurality of elastomeric isolators, the one or more seals bridging the gap between the shuttle and the housing;
- wherein the housing has a resonant frequency at least one order of magnitude below a resonant frequency of the one or more electronic components in the shuttle.
An isolation assembly for a munition, the assembly comprising:
- a housing extending along a central axis and defining a cavity;
- a shuttle received in the cavity with a gap between the shuttle and the housing, the shuttle configured to house one or more electronic components;
- first and second isolation assemblies contained in the gap between the shuttle and the housing, the first and second isolation assemblies each including an elastomer and one or more seals, the one or more seals configured and arranged to prevent extrusion of each of the elastomers, wherein the isolation assembly retains the shuttle in the cavity with six degrees of freedom;
- and
- one or more circuit boards in the housing, wherein the housing has a resonant frequency at least one order of magnitude below a resonant frequency of the one or more circuit boards.
Dependencies are inferred from the claim text.