27 April 2011 Energy-harvesting from mortar tube firing impulse to supplement fire-control electronics battery
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Novel designs are presented for piezoelectric-based energy-harvesting power sources that are attached to mortar tubes to harvest energy from the firing impulse. The power sources generate electrical energy by storing mechanical potential energy in spring elements during the firing. The mass-spring unit of the power source begins to vibrate after firing, thereby applying a cyclic force to a set of piezoelectric elements to which it is attached. The mechanical energy of vibration is thereby converted to electrical energy over a relatively long period of time and stored in electrical energy storage elements such as capacitors. The power sources are shown to provide a significant portion of the required electrical energy of the fire control system.
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J. Rastegar, J. Rastegar, R. Murray, R. Murray, R. Tillinghast, R. Tillinghast, C. Pereira, C. Pereira, H.-L. Nguyen, H.-L. Nguyen, "Energy-harvesting from mortar tube firing impulse to supplement fire-control electronics battery", Proc. SPIE 7977, Active and Passive Smart Structures and Integrated Systems 2011, 79770R (27 April 2011); doi: 10.1117/12.880476; https://doi.org/10.1117/12.880476

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