Simulated trajectories error analysis program. Volume 2 - Analytical manual Final report
Computer program for simulated trajectory error analysis
Demlow, E.↗
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Net-2 circuit analysis program
Circuit features, variational capabilities, input-output capabilities, and transient analysis of NET-2 circuit program
COMPUTER DESIGN↗
Space Trajectory Error Analysis Program (STEAP) for halo orbit missions. Volume 2: Programmer's manual
The six month effort was responsible for the development, test, conversion, and documentation of computer software for the mission analysis of missions to halo orbits about libration points in the earth-sun system. The software consisting of two programs called NOMNAL and ERRAN is part of the Space Trajectories Error Analysis Programs. The program NOMNAL targets a transfer trajectory from earth on a given launch date to a specified halo orbit on a required arrival date. Either impulsive or finite thrust insertion maneuvers into halo orbit are permitted by the program. The transfer trajectory is consistent with a realistic launch profile input by the user. The second program ERRAN conducts error analyses of the targeted transfer trajectory. Measurements including range, doppler, star-planet angles, and apparent planet diameter are processed in a Kalman-Schmidt filter to determine the trajectory knowledge uncertainty.
Byrnes, D. V.↗
Coupled rotor/airframe vibration analysis program manual manual. Volume 1: User's and programmer's instructions
user instruction and software descriptions for the base program of the coupled rotor/airframe vibration analysis are provided. The functional capabilities and procedures for running the program are provided. Interfaces with external programs are discussed. The procedure of synthesizing a dynamic system and the various solution methods are described. Input data and output results are presented. Detailed information is provided on the program structure. Sample test case results for five representative dynamic configurations are provided and discussed. System response are plotted to demonstrate the plots capabilities available. Instructions to install and execute SIMVIB on the CDC computer system are provided.
Cassarino, S.↗
HFAST - A harmonic analysis program for Stirling cycles
HFAST is a general-purpose third-order harmonic analysis and design program for predicting the cyclic-steady state thermodynamic performance of Stirling cycles. It represents the state-of-the-art results of years of research efforts at Mechanical Technology Inc. (MTI) in the development of Stirling cycle machines. The code has been extensively used at MTI to support the development of both free-piston and kinematic Stirling cycle machines. Lately, HFAST has undergone many major improvements, both in the analysis method and in the user's interface. This paper presents a brief description of the current analysis method used in HFAST.
Huang, S. C.↗
A survey of transient circuit analysis programs
Values of major features of digital computer programs used for nonlinear transient circuit analysis, from user point of view
ELECTRIC NETWORK↗
Separation of two bodies in space. A machine programmed analysis using the Lagrange equations and Eulerian angles
Fortran computer program and Lagrangian motion equations for separation analysis of two bodies in space
FORTRAN↗
Surveyor III material analysis program
Apollo 12 returned Surveyor 3 component materials analysis for lunar exposure effects by nondestructive and destructive tests
Nickle, N. L.↗
Propulsion and Space Vehicle Systems Analysis Program Tensor I, volume I Technical report no. 341
Computer program for space vehicle and propulsion systems analysis
SYSTEMS ANALYSIS↗
Optical design and analysis program
Computer program provides efficient handling of optical analysis equations and is sufficiently general in approach to accept wide variety of systems. Diagnostic messages are generated to aid user in pinpointing any inconsistencies in system definition.
Meredith, C. F.↗
Noise studies of communication systems using the SYSTID computer aided analysis program
SYSTID computer aided design is a simple program for simulating data systems and communication links. A trial of the efficiency of the method was carried out by simulating a linear analog communication system to determine its noise performance and by comparing the SYSTID result with the result arrived at by theoretical calculation. It is shown that the SYSTID program is readily applicable to the analysis of these types of systems.
Tranter, W. H.↗
NSEG: A segmented mission analysis program for low and high speed aircraft. Volume 3: Demonstration problems
Program NSEG is a rapid mission analysis code based on the use of approximate flight path equations of motion. Equation form varies with the segment type, for example, accelerations, climbs, cruises, descents, and decelerations. Realistic and detailed vehicle characteristics are specified in tabular form. In addition to its mission performance calculation capabilities, the code also contains extensive flight envelope performance mapping capabilities. For example, rate-of-climb, turn rates, and energy maneuverability parameter values may be mapped in the Mach-altitude plane. Approximate take off and landing analyses are also performed. At high speeds, centrifugal lift effects are accounted for. Extensive turbojet and ramjet engine scaling procedures are incorporated in the code.
Hague, D. S.↗
Interactive Image-Analysis Program
BLOBTOOL computer program used to prepare image for analysis and generates various quantitative measurements of objects or structures present in images. Includes basic input/output capabilities, option to display built-in color tables, and access to on-line help. Written in C Language.
Leonard, Desiree M.↗
Apollo lunar sample analysis program - A progress report.
Apollo lunar sample collection and analysis, discussing astronauts activity and equipment, sample types, laboratories for radioactive counting and gas analysis, etc
Wilmarth, V. R.↗
A Monte Carlo error analysis program for near-Mars, finite-burn, orbital transfer maneuvers
A computer program was developed which performs an error analysis of a minimum-fuel, finite-thrust, transfer maneuver between two Keplerian orbits in the vicinity of Mars. The method of analysis is the Monte Carlo approach where each off-nominal initial orbit is targeted to the desired final orbit. The errors in the initial orbit are described by two covariance matrices of state deviations and tracking errors. The function of the program is to relate these errors to the resulting errors in the final orbit. The equations of motion for the transfer trajectory are those of a spacecraft maneuvering with constant thrust and mass-flow rate in the neighborhood of a single body. The thrust vector is allowed to rotate in a plane with a constant pitch rate. The transfer trajectory is characterized by six control parameters and the final orbit is defined, or partially defined, by the desired target parameters. The program is applicable to the deboost maneuver (hyperbola to ellipse), orbital trim maneuver (ellipse to ellipse), fly-by maneuver (hyperbola to hyperbola), escape maneuvers (ellipse to hyperbola), and deorbit maneuver.
Green, R. N.↗
Description and evaluation of digital-computer design-analysis program for homopolar inductor alternators
Digital computer program for homopolar inductor alternator electromagnetic design analysis
Bollenbacher, G.↗
Study leading to the refinement of the SRB structural analysis program
The constructed SRB math model was used for the analysis of the 85/32/5(VV/VH/theta) cavity collapse load condition for the aft end of the SRB structure. Linear, nonlinear collapse and bifurcation buckling analyses were performed. The linear and bifurcation buckling analyses showed that structural integrity and positive margins of safety are maintained for the applied maximum load case using a design factor of 1.25. The nonlinear collapse analysis predicts stresses in the skirt above the yield for a load factor of 1.0. Applying the 1.25 design factor gives a negative margin of safety against the material ultimate. The predicted collapse occurs at a load factor higher than 1.25.
Jones, W. E.↗
Random harmonic analysis program, L221 (TEV156). Volume 2: Supplemental system design and maintenenace document
Volume 2 of a two volume document is presented. A computer program, L222 (TEV 156), available for execution on the CDC 6600 computer is described. The program is capable of calculating steady-state solutions for linear second-order differential equations due to sinusoidal forcing functions. From this, steady-state solutions, generalized coordinates, and load frequency responses may be determined. Statistical characteristics of loads for the forcing function spectral shape may also be calculated using random harmonic analysis techniques. The particular field of application of the program is the analysis of airplane response and loads due to continuous random air turbulence.
Graham, M. L.↗