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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Asymptotic and periodic behavior prediction for nonlinear control system with mathematical model of rigid body vehicle
Spacecraft and balloon radiometry data, theories, and mathematical model of reflectance and scattering of solar radiation by earth
A "sensory conflict" model of spatial orientation was developed. This mathematical model was based on concepts derived from observer theory, optimal observer theory, and the mathematical properties of coordinate rotations. The primary hypothesis is that the central nervous system of the squirrel monkey incorporates information about body dynamics and sensory dynamics to develop an internal model. The output of this central model (expected sensory afference) is compared to the actual sensory afference, with the difference defined as "sensory conflict." The sensory conflict information is, in turn, used to drive central estimates of angular velocity ("velocity storage"), gravity ("gravity storage"), and linear acceleration ("acceleration storage") toward more accurate values. The model successfully predicts "velocity storage" during rotation about an earth-vertical axis. The model also successfully predicts that the time constant of the horizontal vestibulo-ocular reflex is reduced and that the axis of eye rotation shifts toward alignment with gravity following postrotatory tilt. Finally, the model predicts the bias, modulation, and decay components that have been observed during off-vertical axis rotations (OVAR).
Mathematical model simulation of solar-thermal energy conversion systems and collectors
Reliability of Surveyor lunar roving vehicle design - mathematical models, failure modes, and predictions
Gemini spacecraft launch site processing - mathematical model to predict processing time
Mathematical model for design of optimal control system with spatially distributed parameters
Mathematical model for analyzing changes through time in binary dyadic relation - probability theory
Mathematical model and longitudinal oscillation mode computations for Thor and Agena test vehicles
Digital computer program for minimizing weight of fuel cell power systems - prelaunch startup and instrumentation - mathematical model of static moisture removal process - fuel cell model
Parameter tracking systems based on equation error approach for mathematical model of unknown plant
Mathematical model for neutron diffusion mechanics in heterogeneous media with vacuum channels
Thermal stress analysis of epoxy encapsulants using mathematical model for predicting performance in thermal shock
Saturn V launch vehicle malfunction effects model
Binomial and trinomial mathematical models for reliability growth studies - statistical analysis of system failures
Parameter indeterminacy in system identification for mathematical model with adjustable parameters matched to system output by feedback
Mathematical models for estimating thermal conductivity of cermet fuel materials used in nuclear reactor
Mathematical models used to determine thermal and electrical behavior of composite superconducting magnets