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  • 1
    Electronic Resource
    Electronic Resource
    Natural frequency of the compound centrifugal pendulum (1961)
    Springer
    Flow, turbulence and combustion 10 (1961), S. 180-184 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The equations of motion governing the free vibrations of the compound centrifugal pendulum are stated, and the linearized solution is given. A comparison is then made between the exact (numerical) solution of the non-linear equations of motion and the linearized solution. This comparison is in the form of the ratio of the natural frequencies and is presented graphically and tabularly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411911
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Natural frequency of the compound centrifugal pendulum (1961)
    Springer
    Details
    Publication Date: 1961-01-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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    PAPER CURRENT
  • 3
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    The Galileo attitude and articulation control system - A radiation-hard, high precision, state-of-the-art control system (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The Galileo mission and spacecraft, consisting of a Jupiter-orbiter and an atmospheric entry probe, are discussed. Components will include: magnetometers and plasma-wave antennas on a boom, high-gain antenna, probe vehicle, two different bus electronics packages, and a radioisotope thermoelectric generator. Instruments, investigators and objectives are tabulated for both probe science and orbiter science investigations. Requirements in the design of the attitude and articulation control system are very stringent because of the complex dynamics, flexible body effects, the need for autonomy, and the severe radiation environment in the Jupiter nighborhood. Galileo was intended to be ready for launch via Space Shuttle in May of 1986.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The NASA space power technology program (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: NASA has a broad technology program in the field of space power. This paper describes that program, including the roles and responsibilities of the various NASA field centers and major contractors. In the power source area, the paper discusses the SP-100 Space Nuclear Power Project, which has been under way for about seven years and is making substantial progress toward development of components for a 100-kilowatt power system that can be scaled to other sizes. This system is a candidate power source for nuclear electric propulsion, as well as for a power plant for a lunar base. In the energy storage area, the paper describes NASA's battery- and fuel-cell development programs. NASA is actively working on NiCd, NiH2, and lithium batteries. A status update is also given on a U.S. Air Force-sponsored program to develop a large (150 ampere-hour) lithium-thionyl chloride battery for the Centaur upper-stage launch vehicle. Finally, the area of power management and distribution (PMAD) is addressed, including power system components such as solid-state switches and power integrated circuits. Automated load management and other computer-controlled functions offer considerable payoffs. The state of the art in space power is described, along with NASA's medium- and long-term goals in the area.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: ; : Spaceflight mechan
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    NASA TECHNICAL REPORTS
  • 5
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    (abstract) An Assessment of Electric Propulsion Research, Development, and Application in the United States (1995)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper will discuss the development of Electric Propulsion technology in the U.S. from the 1960's to the present. It will summarize the various activities related to arcjets, resistojets, pulsed plasma thrustors, magneto-plasma-dynamic thrustors, ion engines, and more recently the evaluation of Hall effect thrustors of the SPT or Anode Layer type developed in Russia. Also, demonstration test flight and actual mission applications will be summarized. Finally, the future application of electric propulsion to near-term commercial communications satellites and planetary missions will be projected. This history is rich in diversity, and has involved a succession of types of thrustors, propellants, and electric power sources. With the recent use of arcjets on commercial communication satellites and the flight tests of ion engines for this application, it appears that electric propulsion is finally on the verge of wide spread application.
    Keywords: Communications and Radar
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    JPL Mars Observer In-Flight Anomaly Investigation (1994)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: None given. Paper gives background of Mars Observer mission, its failure upon Mars orbit insertion, and covers the most credible causes for its demise.
    Keywords: Lunar and Planetary Science and Exploration
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    NASA TECHNICAL REPORTS
  • 7
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    The NASA Telerobotics Research Program (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: An account is given to NASA efforts in the development of space telerobotics, which encompass mission analyses, core technology research, systems-integration testbed evaluations, ground-based demonstrations, and flight experiments. Space telerobotics applications encompass (1) The Space Shuttle Satellite Servicing System, (2) the Space Shuttle Orbiter's Remote Manipulator System, (3) the Space Station Freedom's Flight Telerobotics Servicer, Mobile Servicing Center, and Japanese Experiment Module, and (4) planetary rovers. A fundamental role is being played by NASA-Marshall, which possesses a Teleoperator and Robotics Evaluation Facility.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: IFAC Symposium; Jul 17, 1989 - Jul 21, 1989; Tsukuba; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Advanced flight computers for planetary exploration (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Research concerning flight computers for use on interplanetary probes is reviewed. The history of these computers from the Viking mission to the present is outlined. The differences between ground commercial computers and computers for planetary exploration are listed. The development of a computer for the Mariner Mark II comet rendezvous asteroid flyby mission is described. Various aspects of recently developed computer systems are examined, including the Max real time, embedded computer, a hypercube distributed supercomputer, a SAR data processor, a processor for the High Resolution IR Imaging Spectrometer, and a robotic vision multiresolution pyramid machine for processsing images obtained by a Mars Rover.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: International Symposium on Space Technology and Science; May 22, 1988 - May 27, 1988; Sapporo; Japan
    Format: text
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    NASA TECHNICAL REPORTS
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