With propulsion research programs focused on new levels of efficiency and noise reduction, two avenues for advanced gas turbine technology are emerging: the geared turbofan and ultrahigh bypass ratio fan engines. Both of these candidates are being pursued as collaborative research projects between NASA and the engine manufacturers. The high bypass concept from GE Aviation is an unducted fan that features a bypass ratio of over 30 along with the accompanying benefits in fuel efficiency. This...
Topics: NASA Technical Reports Server (NTRS), FAN BLADES, VIBRATION MEASUREMENT, ROTOR DYNAMICS, DUCTED...
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Jul 12, 2010
07/10
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NON
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A systems definition study of the solar power satellite system is presented. The satellite solar energy conversion and microwave power transmission systems are discussed. Space construction and support systems are examined including a series construction and equipment characteristics analysis. Space transportation for the satellite and the ground receiving station are assessed.
Topics: PERFORMANCE PREDICTION, VIBRATION MEASUREMENT, SPACECRAFT DESIGN, STATISTICAL ANALYSIS, STRUCTURAL...
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252
May 31, 2011
05/11
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Jin, Michael H.; Banger, Kulinder K.; Harris, Jerry D.; Cowen, Jonathan E.; Hepp, Aloysius F
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Both horizontal hot-wall and vertical cold-wall atmospheric chemical spray pyrolysis processes deposited near single-phase stoichiometric CuInS2 thin films. Single-source precursors developed for ternary chalcopyrite materials were used for this study, and a new liquid phase single-source precursor was tested with a vertical cold-wall reactor. The depositions were carried out under an argon atmosphere, and the substrate temperature was kept at 400 C. Columnar grain structure was obtained with...
Topics: THIN FILMS, SOLAR COLLECTORS, CIRCLES (GEOMETRY), ELLIPSES, VIBRATION MEASUREMENT, PHYSICAL...
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May 31, 2011
05/11
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Loncaric, J.; Tsynkov, S. V
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We analyze the problem of suppressing the unwanted component of a time-harmonic acoustic field (noise) on a predetermined region of interest. The suppression is rendered by active means, i.e., by introducing the additional acoustic sources called controls that generate the appropriate anti-sound. Previously, we have obtained general solutions for active controls in both continuous and discrete formulations of the problem. We have also obtained optimal solutions that minimize the overall...
Topics: AEROSPACE SYSTEMS, MANUFACTURING, MONTE CARLO METHOD, AEROSPACE VEHICLES, FAILURE ANALYSIS,...
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May 21, 2011
05/11
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NON
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The fifth annual NASA Symposium on VLSI Design had 13 sessions including Radiation Effects, Architectures, Mixed Signal, Design Techniques, Fault Testing, Synthesis, Signal Processing, and other Featured Presentations. The symposium provides insights into developments in VLSI and digital systems which can be used to increase data systems performance. The presentations share insights into next generation advances that will serve as a basis for future VLSI design.
Topics: FREQUENCY ANALYZERS, FREQUENCY MEASUREMENT, GAS PRESSURE, INTERNAL PRESSURE, REMOTE CONTROL, TIRES,...
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May 22, 2011
05/11
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Pinelli, Thomas E.; Barclay, Rebecca O.; Kennedy, John M
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The U.S. government technical report is a primary means by which the results of federally funded research and development (R&D) are transferred to the U.S. aerospace industry. However, little is known about this information product in terms of its actual use, importance, and value in the transfer of federally funded R&D. To help establish a body of knowledge, the U.S. government technical report is being investigated as part of the NASA/DOD Aerospace Knowledge Diffusion Research...
Topics: COMPONENT RELIABILITY, FLIGHT OPERATIONS, MATHEMATICAL MODELS, SIGNATURE ANALYSIS, STRUCTURAL...
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315
May 23, 2011
05/11
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Silvergate, Pete
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A hyperspectral imaging spectrometer was breadboarded. Key innovations were use of a sapphire prism and single InSb focal plane to cover the entire spectral range, and a novel slit optic and relay optics to reduce thermal background. Operation over a spectral range of 450 - 4950 nm (approximately 3.5 spectral octaves) was demonstrated. Thermal background reduction by a factor of 8 - 10 was also demonstrated.
Topics: VIBRATION MEASUREMENT, SPACE SHUTTLE MISSIONS, CALIBRATING, MICROGRAVITY, ORBITAL SPACE TESTS,...
By and large four wheeler vehicles are one of the well known vehicles in city transport. Four wheeler vehicles are presented to vibrations because of unpredictable surface of streets. This influences the well being and in addition inconvenience of the driver and travelers. The motions are moved into the group of driver and traveler through the body tissues, organs and frameworks of the individual causing different impacts on the structures inside the body before it is hosed and scattered. From...
Topics: NVH TESTING, SEAT EFFECTIVE AMPLITUDE TEST SEAT, TRANSFER PATH OF VIBRATIONS TO THE STEERING WHEEL,...
A proposed development of laser-based instrumentation systems would extend the art of laser Doppler vibrometry beyond the prior limits of laser-assisted remote hearing and industrial vibrometry for detecting defects in operating mechanisms. A system according to the proposal could covertly measure vibrations of objects at distances as large as thousands of kilometers and could process the measurement data to enable recognition of vibrations characteristic of specific objects of interest,...
Topics: NASA Technical Reports Server (NTRS), WHISPERING GALLERY MODES, HEARING, REMOTE CONTROL, VIBRATION...
A series of studies are reported to assess the noise induced building vibrations associated with Concorde operations. The levels of induced vibration and associated indoor/outdoor noise levels resulting from aircraft and nonaircraft events in selected homes, historic and other buildings near Dulles International Airport were recorded. The building response resulting from aircraft operations was found to be directly proportional to the overall sound pressure level and approximately independent...
Topics: NASA Technical Reports Server (NTRS), CONCORDE AIRCRAFT, JET AIRCRAFT NOISE, MARYLAND, STRUCTURAL...
A program of analysis, design, fabrication and testing has been conducted to develop computer programs for predicting rocket engine turbopump inducer hydrodynamic loading, stress magnitude and distribution, and vibration characteristics. Methods of predicting blade loading, stress, and vibration characteristics were selected from a literature search and used as a basis for the computer programs. An inducer, representative of typical rocket engine inducers, was designed, fabricated, and tested...
Topics: NASA Technical Reports Server (NTRS), IMPELLERS, PERFORMANCE PREDICTION, STRESS ANALYSIS, TURBINE...
A study was conducted in which available airload and blade response data for the NH-3A and CH-53A rotors were analyzed in an attempt to provide greater insight into the sources of rotor vibratory loads in both level and maneuvering flight. Primary emphasis in the study was placed on examining and understanding causes of high-frequency rotor control loads. Secondary objectives were: (1) to examine the effect of number of rotor blades on hub vibratory shear forces and (2) to assess which of the...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC LOADS, HELICOPTER PERFORMANCE, ROTARY WINGS,...
384
384
Jul 11, 2010
07/10
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Davis, D. D
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The technique of flash photolysis-resonance fluorescence was utilized to study nine reactions of stratospheric importance. The tropospheric degradation reactions of seven halogenated hydrocarbons were studied to assess their possible influx into the stratosphere. There are reactions of either Cl, OH, or O(3P) species with hydrogenated species, O3 or chlorinated compounds. Apart from the kinetic measurements, the quantum yield for the production of O(1D) from O3 in the crucial wavelength region...
Topics: DATA ACQUISITION, MICROPROCESSORS, OPTICAL MEMORY (DATA STORAGE), STRUCTURAL VIBRATION, SYSTEMS...
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Jun 1, 2011
06/11
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Prince, Frank A
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Weight has been used as the primary input variable for cost estimating almost as long as there have been parametric cost models. While there are good reasons for using weight, serious limitations exist. These limitations have been addressed by multi-variable equations and trend analysis in models such as NAFCOM, PRICE, and SEER; however, these models have not be able to address the significant time lags that can occur between the development of similar space flight hardware systems. These time...
Topics: GEAR TEETH, MULTISENSOR FUSION, FATIGUE TESTS, DECISION MAKING, PITTING, SENSORS, WEAR, SYSTEMS...
The U.S. Army's UH-60A Black Hawk 2240-kW (3000-hp) class, twin-engine helicopter transmission was tested at the NASA Lewis Research Center. The vibration and efficiency test results will be used to enhance the data base for similar-class helicopters. Most of the data were obtained for a matrix of test conditions of 50 to 100 percent of rated rotor speed and 20 to 100 percent of rated input power. The transmission's mechanical efficiency at 100 percent of rated power was 97.3 and 97.5 percent...
Topics: NASA Technical Reports Server (NTRS), HELICOPTERS, TRANSMISSIONS (MACHINE ELEMENTS), VIBRATION...
A dynamic pressure source is described for producing sinusoidally varying pressures of up to 34 kPa zero to peak, over the frequency range of approximately 50 Hz to 2 kHz. The source is intended for the dynamic calibration of pressure transducers. The transducer to be calibrated is mounted near the base of the thick walled aluminum tube forming the vessel so that the pressure sensitive element is in contact with the liquid in the tube. A section of the tube is filled with small steel balls to...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, DYNAMIC PRESSURE, ELECTROMECHANICAL DEVICES,...
With growing trend toward higher temperature capabilities, lightweight, and multifunctionality, significant advances in ceramic matrix composites (CMCs) will be required for future aerospace applications. The presentation will provide an overview of material requirements for future aerospace missions, and the role of ceramics and CMCs in meeting those requirements. Aerospace applications will include gas turbine engines, aircraft structure, hypersonic and access to space vehicles, space power...
Topics: NASA Technical Reports Server (NTRS), CERAMIC MATRIX COMPOSITES, GAS TURBINE ENGINES, AEROSPACE...
Helicopter health monitoring systems use vibration signatures generated from damaged components to identify transmission faults. For damaged gears, these signatures relate to changes in dynamics due to the meshing of the damaged tooth. These signatures, referred to as condition indicators (CI), can perform differently when measured on different systems, such as a component test rig, or a full-scale transmission test stand, or an aircraft. These differences can result from dissimilarities in...
Topics: NASA Technical Reports Server (NTRS), TRANSMISSIONS (MACHINE ELEMENTS), HELICOPTERS, SYSTEMS...
The case history contained provides insight toward the mechanical and hydraulic behavior of a vertical pump. It clearly demonstrates the need for measurements on the rotor at or near the impeller area. The results are reported of an analysis on a service water pump. This pump is typical of the water pumps used throughout the power generation industry. Although little is known of the mechanical behavior of vertical pumps because of difficulty in modeling the rotor system, recent developments in...
Topics: NASA Technical Reports Server (NTRS), HYDRAULIC FLUIDS, PUMPS, RESONANT VIBRATION, ROTARY...
The effects of the airborne environment on a pointing and tracking system using a turret external to an aircraft are summarized. The data covered a series of flight tests and a span of seven years. The two major airborne effects were shown to be direct pressure loading of optical elements and vibrations of the entire turret. The direct optical loading problem was minimized by fence designs for the turret.
Topics: NASA Technical Reports Server (NTRS), AIRBORNE EQUIPMENT, AIRCRAFT STRUCTURES, ATMOSPHERIC EFFECTS,...
A diagnostic tool for detecting damage to gears was developed. Two different measurement technologies, oil debris analysis and vibration were integrated into a health monitoring system for detecting surface fatigue pitting damage on gears. This integrated system showed improved detection and decision-making capabilities as compared to using individual measurement technologies. This diagnostic tool was developed and evaluated experimentally by collecting vibration and oil debris data from...
Topics: NASA Technical Reports Server (NTRS), GEAR TEETH, SYSTEMS HEALTH MONITORING, SPIRAL BEVEL GEARS,...
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Jul 15, 2019
07/19
by
Wallace, Robert Hoe
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xii, 148 p. : 22 cm. --
Topics: Machinery -- Vibration, Vibration -- Measurement, Vibration (Aeronautics)
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505
May 31, 2011
05/11
by
Sireli, Yesim; Kauffmann, Paul; Gupta, Surabhi; Kachroo, Pushki
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There is a significant market demand for advanced cockpit weather information products. However, it is unclear how to identify the most promising technological options that provide the desired mix of consumer requirements by employing feasible technical systems at a price that achieves market success. This study develops a unique product development decision model that employs Quality Function Deployment (QFD) and Kano's model of consumer choice. This model is specifically designed for...
Topics: PHOTOGRAMMETRY, SOLAR COLLECTORS, SOLAR SAILS, TARGETS, TRANSMITTERS, VIBRATION MEASUREMENT, VIDEO...
A NASA twin-jet airplane was used to obtain controlled noise and vibration environments during flight while obtaining subjective responses from 13 passenger-subjects (6 females and 7 males). Subjective ratings of overall comfort, comfort when considering only vibration, and comfort when considering only noise were obtained during times of different vibration and noise environments. Passenger-subjects were able to distinguish and rate noise better than vibration. In addition, there was a...
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT NOISE, FLIGHT TESTS, RIDING QUALITY, TRANSPORT...
A feasibility unit suitable for use as a voice recorder on the space shuttle was developed. A modification, development, and test program is described. A LM-DSEA recorder was modified to achieve the following goals: (1) redesign case to allow in-flight cartridge change; (2) time code change from LM code to IRIG-B 100 pps code; (3) delete cold plate requirements (also requires deletion of long-term thermal vacuum operation at 0.00001 MMHg); (4) implement track sequence reset during cartridge...
Topics: NASA Technical Reports Server (NTRS), SPACE SHUTTLES, TAPE RECORDERS, DIAGRAMS, FEASIBILITY...
An investigation is reported involving a mathematical procedure using 4 x 4 transformation matrices for analyzing the vibrations of flexible manipulators. Previous studies with the procedure are summarized and the method is extended to include flexible joints as well as links, and to account for the effects of various power transmission schemes. A systematic study of the allocation of structural material and the placement of components such as motors and gearboxes was undertaken using the...
Topics: NASA Technical Reports Server (NTRS), MANIPULATORS, VIBRATION MEASUREMENT, ELASTIC DEFORMATION,...
An important problem that has emerged from combined analytical/experimental investigations is the task of identifying and quantifying the differences between results predicted by F.E. analysis and results obtained from experiment. The objective of this study is to extend and evaluate the procedure developed by Sidhu for correlation of linear F.E. and modal test data to include structures with viscous damping. The desirability of developing this procedure is that the differences are identified...
Topics: NASA Technical Reports Server (NTRS), DYNAMIC STRUCTURAL ANALYSIS, EXPERIMENTATION, FINITE ELEMENT...
Methods developed for measuring blade and rotor-shaft system response include optical systems, transient instruments, and special digital data processing equipment. Optical methods offer some distinct benefits for blade vibration measurement. Transient and steady state measurements of the response of rotor-shaft systems strongly affect analytical methods development. Digital computing systems allow processing of large volumes of high speed data from rotating blade sets. Also, digital systems...
Topics: NASA Technical Reports Server (NTRS), DYNAMIC STRUCTURAL ANALYSIS, PROPULSION SYSTEM PERFORMANCE,...
John H. Glenn's historic return to space was a primary focus of the STS-95 mission. The Hubble Space Telescope (HST) orbital Systems Test (HOST), an STS-95 payload, was an in-flight demonstration of HST components to be installed during the next HST servicing mission. One of the components under evaluation was the cryocooler for the Near Infrared Camera and Multi-Object Spectrometer (NICMOS). Based on concerns about vibrations from the operation of the NICMOS cryocooler affecting the overall...
Topics: NASA Technical Reports Server (NTRS), ACCELERATION MEASUREMENT, HUBBLE SPACE TELESCOPE, SPACE...
An acoustical study conducted during the period from September 1, 1973 to April 30, 1974 measured sound pressure levels and vibration amplitudes inside and outside of the subsonic tunnel and on the tunnel structure. A discussion of the technical aspects of the study, the field measurement and data reduction procedures, and results are presentd, and conclusions resulting from the study which bear upon near field and far field tunnel noise, upon the tunnel as an acoustical enclosure, and upon the...
Topics: NASA Technical Reports Server (NTRS), ACOUSTIC MEASUREMENT, SUBSONIC WIND TUNNELS, DATA REDUCTION,...
In this paper, an integrated approach for gear health prognostics using particle filters is presented. The presented method effectively addresses the issues in applying particle filters to gear health prognostics by integrating several new components into a particle filter: (1) data mining based techniques to effectively define the degradation state transition and measurement functions using a one-dimensional health index obtained by whitening transform; (2) an unbiased l-step ahead RUL...
Topics: NASA Technical Reports Server (NTRS), FILTERS, MECHANICAL ENGINEERING, SPIRAL BEVEL GEARS, SYSTEMS...
An analytical study of stresses in the blades recorded during the tests of the DH 2011 jet flap rotor was performed. The main objective of the study was to compare the experimental results with analyticaly determined stresses. The comparison extended over 15 specific flight cases has been only partially successful. In fact computed 3P and 4P stress components showed only a poor correlation with the test data obtained. It is believed that the simplified model of aeroelastic effects used is...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC LOADS, AEROELASTICITY, HELICOPTERS, ROTARY WINGS,...
A method is described to improve a linear nonproportionally damped analytical model of a structure. The procedure finds the smallest changes in the analytical model such that the improved model matches the measured modal parameters. Features of the method are: (1) ability to properly treat complex valued modal parameters of a damped system; (2) applicability to realistically large structural models; and (3) computationally efficiency without involving eigensolutions and inversion of a large...
Topics: NASA Technical Reports Server (NTRS), DYNAMIC RESPONSE, DYNAMIC STRUCTURAL ANALYSIS, MODAL...
A diagnostic tool was developed for detecting fatigue damage to rolling element bearings in an OH-58 main rotor transmission. Two different monitoring technologies, oil debris analysis and vibration, were integrated using data fusion into a health monitoring system for detecting bearing surface fatigue pitting damage. This integrated system showed improved detection and decision-making capabilities as compared to using individual monitoring technologies. This diagnostic tool was evaluated by...
Topics: NASA Technical Reports Server (NTRS), BALL BEARINGS, VIBRATION, VIBRATION MEASUREMENT, FATIGUE...
The substructure function generator program is discussed. Input to this program consists of a definition of a finite element model of a substructure, and specification of the type and number of displacement functions to be generated. Primary output is a substructure data file containing the substructure mass and stiffness matrices expressing kinetic and potential energies as quadratic forms in coefficients of the displacement functions, etc. The substructure synthesis program forms complete...
Topics: NASA Technical Reports Server (NTRS), NUMERICAL ANALYSIS, SPACE SHUTTLES, SPACECRAFT DESIGN,...
Two electrohydraulic vibration isolation systems were designed and fabricated to reduce the vertical vibrations transmitted to the XH-51N research helicopter cabin at the blade passage frequency (18 Hz) and its first harmonic (36 Hz). Hydraulic power and electrical control are provided to two separate servoactuators from a common power supply and control electronics package located behind the pilot's seat. One servoactuator is installed between the cabin and fuselage and replaces an existing...
Topics: NASA Technical Reports Server (NTRS), HELICOPTER DESIGN, HELICOPTER PERFORMANCE, ROTARY WINGS,...
Equipment is capable of measuring frequencies from 0 to 50 Hz and is portable, light, inexpensive, and easily adaptable to field operations. System could be used in situations where it is necessary to record simultaneously subject response to other types of physical measurement or stimuli, such as temperature, noise, or pressure.
Topics: NASA Technical Reports Server (NTRS), AUTOMOBILES, HUMAN REACTIONS, PASSENGERS, TRANSPORTATION,...
Modifications were incorporated into a helicopter active transmission isolation system to provide the capability of utilizing the system as a rotor force measuring device. These included; (1) isolator redesign to improve operation and minimize friction, (2) installation of pressure transducers in each isolator, and (3) load cells in series with each torque restraint link. Full scale vibration tests performed during this study on a CH-53A helicopter airframe verified that these modifications do...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC FORCES, FORCE DISTRIBUTION, H-53 HELICOPTER,...
Future gravitational wave antennas will be approximately 100 kilogram cylinders, whose end-to-end vibrations must be measured so accurately (10 to the -19th power centimeters) that they behave quantum mechanically. Moreover, the vibration amplitude must be measured over and over again without perturbing it (quantum nondemolition measurement). This contrasts with quantum chemistry, quantum optics, or atomic, nuclear, and elementary particle physics where measurements are usually made on an...
Topics: NASA Technical Reports Server (NTRS), GRAVITATIONAL WAVE ANTENNAS, QUANTUM MECHANICS, RADIATION...
The design theory and trade-offs involved in the selection of laser heterodyne sensors for use in active control of spacecraft structures are discussed. These sensors include a HeNe distance measuring system for structures requiring accuracies to .1 mm, a CO2 distance measuring system for measuring unambiuously down to .01 microns, and vibration sensors based on both HeNe and CO2 lasers.
Topics: NASA Technical Reports Server (NTRS), ALIGNMENT, LARGE SPACE STRUCTURES, LASER APPLICATIONS,...
We review spatially-weighted optical fiber sensors that filter specific vibration modes from one dimensional beams placed in clamped-free and clamped-clamped configurations. The sensitivity of the sensor is varied along the length of the fiber by tapering circular-core, dual-mode optical fibers. Selective vibration mode suppression on the order of 10 dB was obtained. We describe experimental results and propose future extensions to single mode sensor applications.
Topics: NASA Technical Reports Server (NTRS), FIBER OPTICS, OPTICAL FIBERS, OPTICAL MEASURING INSTRUMENTS,...
The Vibration Pattern Imager (VPI) system was designed to control and acquire data from scanning laser vibrometer sensors. The PC computer based system uses a digital signal processing (DSP) board and an analog I/O board to control the sensor and to process the data. The VPI system was originally developed for use with the Ometron VPI Sensor, but can be readily adapted to any commercially available sensor which provides an analog output signal and requires analog inputs for control of mirror...
Topics: NASA Technical Reports Server (NTRS), ANALOG TO DIGITAL CONVERTERS, DATA ACQUISITION, DATA...
578
578
May 23, 2011
05/11
by
ONeal, Robert L.; Levine, Arlene S.; Kiser, Carol C
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This publication documents a selected number of pre-flight, in-flight, and postflight photographs of the LDEF and experiments. Changes in condition of the experiments caused by space exposure are discussed. Accompanying this black and white publication it a CD-ROM that contains the color version of the photographs as well as the text.
Topics: DYNAMIC STRUCTURAL ANALYSIS, VIBRATION MODE, MIR SPACE STATION, IMAGERY, IMAGE RESOLUTION,...
Power spectral density plots and associated time history plots are presented for the Titan-Centaur launch carrying the Viking A spacecraft.
Topics: NASA Technical Reports Server (NTRS), CENTAUR LAUNCH VEHICLE, DYNAMIC LOADS, TITAN LAUNCH VEHICLES,...
An instrumentation concept for measuring blade tip displacements which employs optical probes and an array of micro-computers is presented. The system represents a hitherto unknown instrumentation capability for the acquisition and direct digitization of deflection data concurrently from all of the blade tips of an operational engine rotor undergoing flutter or forced vibration. System measurements are made using optical transducers which are fixed to the case. Measurements made in this way are...
Topics: NASA Technical Reports Server (NTRS), DIGITAL SYSTEMS, GAS TURBINE ENGINES, TURBINE BLADES,...
A model being developed, permits the understanding and prediction of passenger discomfort in a multifactor environment with particular emphasis upon combined noise and vibration. The model has general applicability to diverse transportation systems and provides a means of developing ride quality design criteria as well as a diagnostic tool for identifying the vibration and/or noise stimuli causing discomfort. Presented are: (1) a review of the basic theoretical and mathematical computations...
Topics: NASA Technical Reports Server (NTRS), HUMAN FACTORS ENGINEERING, PASSENGERS, PERFORMANCE...
The development of highly reliable health-monitoring systems is one technology area recommended for reducing the number of helicopter accidents. Helicopter transmission diagnostics are an important part of a helicopter health-monitoring system because helicopters depend on the power train for propulsion, lift, and flight maneuvering. One technique currently being tested for increasing the reliability and decreasing the false alarm rate of current transmission diagnostic tools is the replacement...
Topics: NASA Technical Reports Server (NTRS), DAMAGE, DEBRIS, DETECTION, DIAGNOSIS, TRANSMISSIONS (MACHINE...
Through a SBIR contract between Kennedy Space Center and Silicon Designs, came the tri-axial data acquisition system, known commercially as the G-Logger. It is a portable, self-contained device that stores and analyzes shock, vibration, and temperature data during payload transport. It is sealed for protection from the weather and can be left unattended for up to three weeks as it collects data. It can easily be linked with any desktop or laptop computer in order to download the collected data....
Topics: NASA Technical Reports Server (NTRS), DATA ACQUISITION, VIBRATION MEASUREMENT, GROUND HANDLING,...
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v, 145 p. : 22 cm
Topics: Noise -- Measurement -- Congresses, Vibration -- Measurement -- Congresses
Summary plots are presented for the time histories and power spectral density analyses of vibration and acceleration on the spacecraft from the Titan Centaur launchings carrying the Viking dynamic simulator and the two Viking spacecraft (TC-1, TC-3 and TC-4).
Topics: NASA Technical Reports Server (NTRS), CENTAUR LAUNCH VEHICLE, DYNAMIC LOADS, TITAN LAUNCH VEHICLES,...
