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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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Poison control tube and manifold system for reactivity control of tungsten water moderated rocket reactor
Flow conditions in inlet manifold of M-1 fuel pump drive turbine investigated using circumferential static pressure measurements in conjunction with smoke trace photographs
Cold air performance test of scale model oxidizer pump drive turbine for M-1 engine - performance of first stage with inlet feedpipe manifold assembly
Optimization of stochastic control processes with respect to probability of entering target manifold in specific time interval
Chemical poison control tube and manifold used for reactivity control of rocket reactor
Suboptimal controls maximizing probability of entering target manifold
Heat transfer and fluid flow performance of hydrogen cooled panels and manifold systems
Algorithm for optimal controls maximizing probability of linear time dependent control processes entering target manifold under random disturbances
Absorption strengths of j-manifolds in R branch of Jupiter atmosphere methane band, discussing fine structure blending
Integral manifolds of third order autonomous differential equations with unstable equilibrium point, investigating forward and negative asymptotic problems
Sealed electric storage battery with gas manifold interconnecting each cell
Carbon monoxide oxidation rates for automobile exhaust manifold reactor conditions
Methane spectral band analysis, examining J manifolds self broadening coefficients of R branch
Bounded integral manifolds existence for perturbed system of nonlinear differential equations near critical point, periodic orbit or periodic surface
Absorption intensities of R branch J manifolds of methane band, using half widths and pressure shifts
Solar chromosphere and corona manifold structure data, using high resolution filter photography
The purpose of this paper is to study questions regarding controllability, observability, and realization theory for a particular class of systems for which the state space is a differentiable manifold which is simultaneously a group or, more generally, a coset space. We show that it is possible to give rather explicit expressions for the reachable set and the set of indistinguishable states in the case of autonomous systems. We also establish a type of state space isomorphism theorem. Our objective is to reduce all questions about the system to questions about Lie algebras generated from the coefficient matrices entering in the description of the system and in that way arrive at conditions which are easily visualized and tested.
The determination of altitude by means of barometric sensors in sounding rocket applications is discussed. A method for predicting the performance of such sensing systems is needed. A method is developed for predicting the pressure-time response of a volume subjected to subsonic air flow through from one to four passages. The pressure calculation is based on one-dimensional gas flow with friction. A computed program has been developed which solves the differential equations using a self-starting predictor-corrector integration technique. The input data required are the pressure sensing system dimensions, pressure forcing function(s) at the inlet port(s), and a trajectory over the time of analysis (altitude-velocity-time), if the forcing function is trajectory dependent. The program then computes the pressure-temperature history of the gas in the manifold over the time interval specified.