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  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (2)
  • Chemical Engineering  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The synthesis, characterization, evaluation, and processing of selected cyclo-olefin sulfone copolymers as electron beam resists (1977)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 17 (1977), S. 406-409 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The potential usefulness of electron beam sensitive polymers depends to a large extent on a variety of polymer characteristics such as solubility, sensitivity, and processability which are, in turn, required by the application. This paper details results obtained for methylcyclopentene sulfone copolymers as electron beam recording media. The determination of physical properties and the optimization of processing conditions are reported.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760170615
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    Paper (German National Licenses)
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  • 2
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    Control and stability problems of remote orbital capture (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Certain space shuttle missions may require retrieval of passive spinning and precessing satellites. One proposed means of retrieval utilizes a free-flying teleoperator launched from the shuttle. A study of misalignment, stability, and certain control aspects during capture of an object is reported here. The approach used is to model the dynamics by a Lagrangian formulation and apply torque components to dissipate motion. Differential angular rates between teleoperator and object are assumed, and control responses after capture are reviewed.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Control and stability problems of remote orbital capture (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The dynamics and control aspects of orbital capture of space objects were studied. Differential angular rates and orientation between the object and the grappler were used to investigate the effects of misalignment as well as stability and control. The control responses after capture are discussed. The feasibility of nulling combined spin and nutation of a typical satellite is demonstrated by a Lagrangian formulation to establish a baseline situation. A free-flying teleoperator (FFTO) with a dynamically unbalanced grappler is shown to be desirable because extremely adverse cyclic torques may be generated. A combined teleoperator-satellite system assuming misalignments during capture was dynamically analyzed. Related responses and stability evaluations are included.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: JPL The 2nd Conf. on Remotely Manned Systems (RMS); p 45-46
    Format: text
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    NASA TECHNICAL REPORTS
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