Local definition of generalized control systems.
Mathematical analysis of axioms that provide local definition of generalized control systems
DYNAMIC CONTROL↗
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Results for “Mathematical analysis”
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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A ''Hummingbird'' for the L2 lunar libration point
Mathematical analysis of lunar libration point for anchoring communications satellite to backside of moon
LUNAR SATELLITE↗
Flame spreading at elevated pressures over the surface of igniting solid propellants and propellant ingredients in oxygen/inert environments Annual report
Mathematical analysis of flame propagation at high pressures over surface of igniting solid propellants and propellant ingredients in oxygen/inert atmospheres
Magee, R. S.↗
On fluid inertia effects in infinitely wide foil bearings
Fluid inertia effects in foil bearings - mathematical analysis
Eshel, A.↗
Computer program for prediction of heat transfer through glass.
Thermal behavior of space vehicle window systems predicted by mathematical analysis and computer methods for heat transfer through glass
Comstock, D. F.↗
Root-cubing and general root-powering methods for finding the zeros of polynomials
Mathematical analysis technique generalizes a root squaring and root cubing method into a general root powering method. The introduction of partitioned polynomials into this general root powering method simplifies the coding of the polynomial transformations into input data suitable for processing by computer. The method includes analytic functions.
Bareiss, E. H.↗
Propagation of One and Two Dimensional Waves of Finite Amplitude
Mathematical analysis of propagation of one and two dimensional waves of finite amplitude
Rodin, E. Y.↗
Geometry of the geomagnetic tail
Mathematical analysis of geomagnetic tail of Explorer 33 and Explorer 35 satellites
Behannon, K. W.↗
Second-order wave structure in supersonic flows
Mathematical analysis of wave structure in supersonic flow
Caughey, D. A.↗
Computer program to predict heat transfer through glass.
Thermal behavior of space vehicle window systems predicted by mathematical analysis and computer methods for heat transfer through glass
Comstock, D. F.↗
Constitutive relations for stress and heat flux in a shock wave
Mathematical analysis of shock wave structure incorporating Maxwell moment methods and Boltzmann equation for stress and heat flux constitutive relations
Baganoff, D.↗
Summary of available information on Reynolds analogy for zero-pressure-gradient, compressible, turbulent-boundary-layer flow
Mathematical analysis of Reynolds analogy for turbulent heat transfer, skin friction, and boundary layer flow in adiabatic conditions
Cary, A. M., Jr.↗
An improved analytical treatment of the denting of thin sheets by hail
Mathematical analysis of denting of thin aircraft skin by hail
Hayduk, R. J.↗
Automated preliminary design of simplified wing structures to satisfy strength and flutter requirements
A simple structural model of an aircraft wing is used to show the effects of strength (stress) and flutter requirements on the design of minimum-weight aircraft-wing structures. The wing is idealized as an isotropic sandwich plate with a variable cover thickness distribution and a variable depth between covers. Plate theory is used for the structural analysis, and piston theory is used for the unsteady aerodynamics in the flutter analysis. Mathematical programming techniques are used to find the minimum-weight cover thickness distribution which satisfies flutter, strength, and minimum-gage constraints. The method of solution, some sample results, and the computer program used to obtain these results are presented. The results indicate that the cover thickness distribution obtained when designing for the strength requirement alone may be quite different from the cover thickness distribution obtained when designing for either the flutter requirement alone or for both the strength and flutter requirements concurrently. This conclusion emphasizes the need for designing for both flutter and strength from the outset.
Stroud, W. J.↗
A nonlinear-coherence receiver
Mathematical analysis and detailed study of generic model for coherent receiver has demonstrated that nonlinear coherence between given biphase-modulated input signal and supplied reference signal can be used in receivers to improve telecommunication systems.
Simon, M. K.↗
Dynamic technique for measuring adsorption in a gas chromatograph
Gas-chromatographic procedure, together with mathematical analysis of adsorption isotherm, allows relative surface areas and adsorptive powers for trace concentrations to be determined in a few minutes. Technique may be used to evaluate relative surface areas of different adsorbates, expressed as volume of adsorbent/gram of adsorbate, and to evaluate their relative adsorptive power.
Deuel, C. L.↗
Effect of filtering on noise and timing in nuclear particle detection
The relations between signal shaping, noise, and timing resolution in nuclear particle detection systems are examined in this paper. Mathematical analysis of five commonly used types of filters leads to numerical results for system noise components arising from sources in the preamplifier, detector, and bias resistors. These results are presented in the form of design curves for the various filters, showing the dependence of each output noise component on both the magnitude of the noise sources and the filter time constants. Three of the filters considered are simple RC types; the remaining two are combinations of delay lines and RC elements. The quantitative calculations specifically assume a silicon detector and a field-effect-transistor preamplifier. Those filters that exhibit bipolar step response are analyzed in terms of crossover timing resolution, based on the earlier noise calculations. Again, the results are summarized in sets of design curves for each filter. Finally, the comparative performance of the various filter types is discussed, and specific examples are given.
Gary, S. A.↗