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  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (4)
  • Analytical Chemistry and Spectroscopy  (3)
  • 2020-2023
  • 1980-1984  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Letters to the editor (1982)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 17 (1982), S. 345-347 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210170712
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Mass spectral fragmentation pathways in 2,4,6-trinitrotoluene derived from a MS/MS unimolecular and collisionally activated dissociation study (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 19 (1984), S. 623-626 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fragmentation pathways of 2,4,6-trinitrotoluene have been examined using 15N and 2H isotopic labelling in conjunction with tandem mass spectrometry. Both the unimolecular and collisionally activated decomposition modes were investigated. Fragmentation pathways were established in both modes and isotopic shifts were used to determine the groups lost. The major pathways include the loss of OH or H2O, followed by the subsequent loss of NO or NO2. There is virtually no ring disintegration until the majority of the attached groups are lost.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210191207
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Letter to the editors (1982)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1982), S. iv 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200090611
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    Paper (German National Licenses)
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  • 4
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    Dynamics and control of a large space antenna (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Previously cited in issue 19, p. 2997, Accession no. A82-38967
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Journal of Guidance, Control, and Dynamics (ISSN 0731-5090); 7; 69-76
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Dynamics and control simulation of large space structures (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Attention is given to the dynamics and control simulation techniques applicable to large space structures, encompassing the model of the large structure as well as models of its dynamics, its onboard controller, its sensor/actuator systems, and various disturbances to which it may be subjected. Control performance parameters must be computed as functions of time, or of such other design parameters as control gain. A large space antenna is used as an example of the structures in question, illustrating the way in which an efficient dynamics and control simulation structure program can be developed, and how antenna parameters such as reflector surface distortions can be computed, without having to solve a large number of equations for each computation time interval.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Aerospace simulation; Feb 02, 1984 - Feb 04, 1984; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Dynamics and control of a large space antenna (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: It is pointed out that large space antennae and other large space structures will play an important role in the coming decades as commercial applications of space become feasible. A investigation is conducted of the structural dynamics and the control properties for a 64-meter diameter center fed antenna. Attention is given to antenna configuration and structural dynamic porperties, the attitude and structural control system, disturbance assessment, hardware sizing, the construction of weighting matrices, and numerical results. It is found that structural uncertainties and model error can cause serious performance deterioration and can even destabilize the controllers. Flight test and in-orbit system identification of critical structural modes will insure performance and reduce risk for large space antenna missions.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 82-1568 , Guidance and Control Conference; Aug 09, 1982 - Aug 11, 1982; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    On-board estimation technology for space station - Current status and future developments. (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Design considerations and projected solutions to on-board automated estimation techniques for advanced technology controls on a space station are described, with emphasis on the state estimator. The space station is modelled as a collection of rigid and flexible bodies connected at a finite number of hinges. The systems dynamics are characterized by angular velocities of the base body, gimbal angles, and deflections of the flexible appendages. The state estimator evolution is projected to occur in four generations, with the first being control logic in the Viking and Voyager spacecraft, the second in the Shuttle and Galileo probe, the third being large antennas and the prototype space station, the last, around the year 2000, for the actual space station. Considerations for attitude, ephemeris, shape determination, and position estimation through each generation are discussed.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AAS PAPER 83-067 , Guidance and control 1983; Feb 05, 1983 - Feb 09, 1983; Keystone, CO
    Format: text
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    NASA TECHNICAL REPORTS
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