Abstract: A kinetic-energy harvester and associated acoustic detection system and method are disclosed. The kinetic-energy harvester includes a magnet with a coil-facing surface and a coil array including a plurality of conductive coils. The coil array is offset from the magnet in a first direction, such that an air gap is defined between the coil-facing surface of the magnet and the coil array. A cantilever beam spring couples the magnet to the coil array and is configured to enable movement of the coil array, relative to the magnet, about a vibration axis that is perpendicular to the first direction. The kinetic-energy harvester is configured to harvest electrical power from vibrations of a vibration-generating object and transmit the electrical power to a system, such as an acoustic detection system which is configured to detect acoustic signals in the vibration-generating object and convert into acoustic data.

Abstract: An acoustic detection system and method and associated kinetic energy harvester is disclosed. The acoustic detection system comprises a vibration-generating object, a kinetic-energy harvester, and an acoustic sensor. The kinetic-energy harvester is embedded within a first location of the vibration-generation object and is configured to wirelessly transmit electrical power to the acoustic sensor, which is embedded within a second location of the vibration-generating object. The acoustic sensor is configured to receive the electrical power, detect acoustic signals, and convert the detected acoustic signals into acoustic data. The kinetic energy harvester may be an electromagnetic harvester that comprises a magnet array and a coil array comprising at least one conductive coil. By inducing a current in the at least one conductive coil through the relative motion between the magnet array and the coil array, the kinetic-energy harvester produces electrical power.

Abstract: An edge stabilizer for a composite structure includes an elongate edge support segment, defining a geometric shape of an edge of the composite structure, and a connector, configured to attach the edge support segment to the edge of the composite structure. The edge support segment comprises first and second halves configured to attach together around the edge, each half including a shoulder, opposing mating relationship of the shoulders defining a slot for receiving the edge. The edge stabilizer can be part of a system for stabilizing an edge of a composite barrel section. The system can also include a moveable cart, the barrel section being supportable upon the cart.

Abstract: A barrel assembly for a composite structure includes a barrel of composite material, a first end ring, and a mid support. The barrel of composite material has a first end, an interior surface and an outer surface, and the first end ring is removably attached to the first end. The first end ring has a perimeter that is substantially congruent with the first end, and is configured to maintain a shape of the barrel. The mid support is removably disposed within the barrel, and has a plurality of spokes extending outwardly from a central hub to contact the interior surface, to maintain a shape of the barrel.

Abstract: A barrel assembly for a composite structure includes a barrel of composite material, a first end ring, and a mid support. The barrel of composite material has a first end, an interior surface and an outer surface, and the first end ring is removably attached to the first end. The first end ring has a perimeter that is substantially congruent with the first end, and is configured to maintain a shape of the barrel. The mid support is removably disposed within the barrel, and has a plurality of spokes extending outwardly from a central hub to contact the interior surface, to maintain a shape of the barrel.

Abstract: A barrel assembly for a composite structure includes a barrel of composite material, a first end ring, and a mid support. The barrel of composite material has a first end, an interior surface and an outer surface, and the first end ring is removably attached to the first end. The first end ring has a perimeter that is substantially congruent with the first end, and is configured to maintain a shape of the barrel. The mid support is removably disposed within the barrel, and has a plurality of spokes extending outwardly from a central hub to contact the interior surface, to maintain a shape of the barrel.

Abstract: A barrel assembly for a composite structure includes a barrel of composite material, a first end ring, and a mid support. The barrel of composite material has a first end, an interior surface and an outer surface, and the first end ring is removably attached to the first end. The first end ring has a perimeter that is substantially congruent with the first end, and is configured to maintain a shape of the barrel. The mid support is removably disposed within the barrel, and has a plurality of spokes extending outwardly from a central hub to contact the interior surface, to maintain a shape of the barrel.