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Vulnerability of a variety of candidate spacecraft electronics to total ionizing dose and displacement damage is studied. Devices tested include optoelectronics, digital, analog, linear bipolar devices, and hybrid devices.
We consider the three dimensional problem of directing a nonholonomic vehicle to seek the source of a scalar signal without the use of position information. If we assume the signal strength decays with distance from the source then we achieve convergence to the source by making use of the extremum seeking method. In the kinematic vehicle model we employ, the forward velocity is constrained to a constant...
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