A digital computer program for the analysis and design of state variable feedback systems
Digital computer program based on matrix formulation for analysis and design of linear state variable feedback systems
LINEAR SYSTEM↗
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Computer program system for dynamic simulation and stability analysis of passive and actively controlled spacecraft. Volume 1. Theory
A theoretical development and associated digital computer program system is presented. The dynamic system (spacecraft) is modeled as an assembly of rigid and/or flexible bodies not necessarily in a topological tree configuration. The computer program system may be used to investigate total system dynamic characteristics including interaction effects between rigid and/or flexible bodies, control systems, and a wide range of environmental loadings. Additionally, the program system may be used for design of attitude control systems and for evaluation of total dynamic system performance including time domain response and frequency domain stability analyses. Volume 1 presents the theoretical developments including a description of the physical system, the equations of dynamic equilibrium, discussion of kinematics and system topology, a complete treatment of momentum wheel coupling, and a discussion of gravity gradient and environmental effects. Volume 2, is a program users' guide and includes a description of the overall digital program code, individual subroutines and a description of required program input and generated program output. Volume 3 presents the results of selected demonstration problems that illustrate all program system capabilities.
Bodley, C. S.↗
Research on Computational and Display Requirements for Human Control of Space Vehicle Boosters, Phase III. Part II - Computer Programs and Data Package Final Report, 1 Mar. - 31 Aug. 1967
Hybrid computer program for real time trajectory determination of human controlled space vehicle booster
REAL TIME↗
Computer program for the numerical solution of nonequilibrium expansions of reacting gas mixtures
Computer program for numerical solution of reacting gas mixture nonequilibrium expansions
GAS MIXTURE↗
Beta distributions: A computer program for probabilities and fractile points
A beta distribution is specified by range parameters a b, and two shape parameters alpha and beta 0. The computer program presented calculates any desired probability and/or fractile point for specified values of a, b, alpha, and beta. This program additionally computes gamma function values for integer and noninteger arguments.
Brownlow, J. D.↗
Experimental assessment of a computer program used in Space Shuttle orbiter entry heating analysis
A high temperature reusable surface insulation (HRSI) tile taken from the Space Shuttle orbiter was subjected to a nominal heating rate of 60 kW/sq m in the laboratory. The surface temperature response to this heating was measured and used as input to a computer program which computed the applied heating rate. The program is part of a software system that is used to infer convective heating rates to the orbiter thermal protection system during entry. The measured and computed heating rates are compared. Results confirm the applicability of this program to the determination of flight heat transfer rates from flight measured surface temperature data.
Wells, W. L.↗
Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouguet Detonations. Interim Revision, March 1976
A detailed description of the equations and computer program for computations involving chemical equilibria in complex systems is given. A free-energy minimization technique is used. The program permits calculations such as (1) chemical equilibrium for assigned thermodynamic states (T,P), (H,P), (S,P), (T,V), (U,V), or (S,V), (2) theoretical rocket performance for both equilibrium and frozen compositions during expansion, (3) incident and reflected shock properties, and (4) Chapman-Jouguet detonation properties. The program considers condensed species as well as gaseous species.
Sanford Gordon↗
Computer program determines gas flow rates in piping systems
Computer program calculates the steady state flow characteristics of an ideal compressible gas in a complex piping system. The program calculates the stagnation and total temperature, static and total pressure, loss factor, and forces on each element in the piping system.
Franke, R.↗
Computer program determines performance efficiency of remote measuring systems
Computer programs control and evaluate instrumentation system performance for numerous rocket engine test facilities and prescribe calibration and maintenance techniques to maintain the systems within process specifications. Similar programs can be written for other test equipment in an industry such as the petrochemical industry.
Merewether, E. K.↗
Computer program utilizes FORTRAN 4 subroutines for contour plotting
Computer program constructs lists of xy-coordinate pairs that define contour curves for an arbitrary given function of two variables and transmits these lists to plotting equipment to produce contour plots. The principal subroutine, CONTUR, is independent of any specific system of plotting subroutines and equipment.
Block, N.↗
Computer program for network synthesis by frequency response fit
Computer program synthesizes a passive network by minimizing the difference in desired and actual frequency response. The program solves for the critical points of the error function /weighted least squares fit between calculated and desired frequency response/ by the multivariable Newton-Raphson method with components constrained to an admissible region.
Green, S.↗
Computer program for calculation of ideal gas thermodynamic data
Computer program calculates ideal gas thermodynamic properties for any species for which molecular constant data is available. Partial functions and derivatives from formulas based on statistical mechanics are provided by the program which is written in FORTRAN 4 and MAP.
Gordon, S.↗
Computer program for parameter optimization
Flexible, large scale digital computer program was designed for the solution of a wide range of multivariable parameter optimization problems. The program has the ability to solve constrained optimization problems involving up to one hundred parameters.
Glatt, C. R.↗
Interplanetary guidance system requirements study. Volume 2 - Computer program descriptions. Part 1 - Program descriptions for interplanetary free-fall trajectories
Computer programs for digital simulations of nominal interplanetary free fall trajectories
Source record↗
Interplanetary Guidance System Requirements Study. Volume 2 - Computer Program Description. Part 3 - Nominal Powered Flight Trajectories
Computer programs for simulating booster nominal trajectories for interplanetary missions
Source record↗
Axial flow compressor computer program for calculating off design performance /Program 4/
Computer program for calculating off-design aerodynamic performance of axial flow compressor
Carmody, R. H.↗
A compilation of current computer programs for low-thrust trajectory analysis
Current computer programs for low thrust trajectory analysis using flyby and rendevous trajectories
Mascy, A. C.↗
AFCRL computer programs for the physical Ephemeris of the moon
Computer programs for generating lunar physical ephemeris
Eckhardt, D. H.↗