Award Data

New classes of aircraft, providing personal, on-demand mobility, are under development and are poised to revolutionize short-duration air travel.nbsp; The impetus for this work comes from advances in electronics and controls, and increases in electric motor power densities.nbsp; As these aircraft are integrated into the transportation system, they will encounter icing conditions that may challenge ...

Of interest to JPL, GRC and GSFC are laser communications telescopes (LCTs) with 30 to 100 cm clear aperture, wavefront error (WFE) less than 62 nm, cumulative WFE and transmission loss not to exceed 3-dB in the far field, advanced thermal and stray light design for operation while sun-pointing (3-degrees from the edge of the sun); -20deg; C to 50deg; C operational range (wider range preferred), a ...

The STTR topic T5.01 envisions Autonomous Communications Systems (ACS) that can be aware of RF environment and the network status and learn from experience to enhance adaptability to nominal/anomalous conditions, self-reconfigure network connections, dynamically maximize performance in response to sensed conditions and mitigate system-level effects of outages and interference. In Phase II, Bluecom ...

MaXentric proposes the GAU2x2 wideband power amplifier system. The design combines MaXentric’s wideband RF PA technology with advanced digital signal processing in a single small footprint package. This tight integration is made possible through the extremely high efficiency and low power dissipation. Since very little power is dissipated as heat, the package and heat sink size can be minimized. ...

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COMPUTATIONAL FLUID DYNAMICS (CFD) TOOLS HAVE NOW DEVELOPED TO THE POINT WHERE THEY CAN BE RELIABLY USED FOR THE DESIGN,EVALUATION, AND ANALYSIS OF SUCH HIGH-PERFORMANCE GAS TURBINES AS THOSE USED IN MODERN AERONAUTICAL PROPULSION SYSTEMS. FOR THESE APPLICATIONS, IT IS NECESSARY TO USE A THREE-DIMENSIONAL VISCOUS CFD CODE THAT COMBINES EFFICIENCY,ACCURACY, AND USER-FRIENDLINESS. FOR AXIAL TURBOMAC ...

BONE WEAKENING IS A CONCERN FOR ASTRONAUTS, WHO NOW EXERCISEIN FLIGHT TO PREVENT LOSS OF BONE IN THE LEGS AND FRACTURE ON LANDING. USING INNOVATIVE METHODOLOGY, THIS PROJECT WILL DESIGN AN INSTRUMENT THAT PROVIDES DIRECT, NON-INVASIVE, ACCURATE, AND REPRODUCIBLE MEASUREMENTS OF BONE STIFFNESS, A COMPONENT OF BONE STRENGTH. THE LONG BONES OF THE LOWER EXTREMITIES OF HUMANS AND LARGER SPECIES OF ANI ...

AN OPTICAL PARAMETRIC OSCILLATOR (OPO) CAN PROVIDE HIGH-POWER, INFRARED TUNABLE OVER A BROAD RANGE. THE DEVELOPMENT OF OPO DEVICES HAS BEEN LIMITED BY THE SCARCITY OF HIGH-QUALITY, NON-LINEAR CRYSTALS AND LOW LASER-DAMAGE THRESHOLD. ZNGEP2 SINGLE CRYSTALS HAVE AN EXCEPTIONALLY HIGH FIGURE OF MERIT (D(2)/N(3), WHERE D IS THE NON-LINEAR COEFFICIENT AND N IS THE INDEX OF REFRACTIONS THAT IS APPROXIMA ...

IN THIS PROJECT, ION-BEAM-FIGURING TECHNIQUES WILL BE APPLIED TO FIGURE ASPHERIC OPTICAL ELEMENTS. A LENS WILL BE CORRECTED FOR 5TH-ORDER ABERRATIONS AS A DEMONSTRATION. SIMULATED ION-BEAM FIGURING OF MORE COMPLEX ELEMENTS WILL BE PERFORMED TO ILLUSTRATE THE POWER OF THE TECHNIQUE. IN THIS PROJECT, ION-BEAM-FIGURING TECHNIQUES WILL BE APPLIED TO FIGURE ASPHERIC OPTICAL ELEMENTS. A LENS WILL BE COR ...

DIRECT COMPUTATION OF TURBULENCE NOISE IS A LOGICAL APPLICATION FOR ADVANCED COMPUTATIONAL FLUID DYNAMICS, CFD, PROGRAMS RUN ON SUPERCOMPUTERS. THIS WOULD ELIMINATE THE HIGHLY EMPIRICAL ASPECTS OF PRESENT NOISE PREDICTION TECHNIQUES AND ENABLE STUDY OF ADVANCED HYPERSONIC PROPULSION SYSTEMS. HOWEVER, MANY OF THE SAME PERSISTENT PROBLEMS OF IMPLEMENTATION THAT EXIST IN AEROACOUSTIC THEORY AND MEASU ...