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  • 1
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    Space Station Freedom (SSF) crew systems SE&I (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Space Station program office planning and requirements activity has accelerated during the past year to bring the Space Station Freedom Program (SSF) through the program requirements review phase during 1988. The preliminary design review cycle began in Jan. 89, and is now planned for completion, with formal preliminary design reviews between Apr. and Sept., 1990. This paper briefly describes the PROGRAMMATIC aspects of the engineering and integration management of the SSF crew systems. Emphasis is given to the Crew Health Care System, which includes the Health Maintenance Facility, the Exercise Countermeasure Facility, and the Environmental Health System; all managed within the Man-Systems, one of the twelve 'distributed systems.' Medical and engineering requirements to meet the needs of the mature Space Station operations environment and highlights of critical technologies and equipment in development will be reviewed.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: SAE PAPER 891475
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Space Infrared Telescope Facility/Multimission Modular Spacecraft Attitude Control System conceptual design (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A control system utilizing the Multi-mission Modular Spacecraft (MMS) Attitude Control System (ACS) was developed and analyzed for the Space Infrared Telescope Facility (SIRTF) spacecraft. Alternative torquer augmentation schemes were studied to determine viable ACS approaches. A control law was developed to use a dual set of single-axis Control Moment Gyros (CMGs) for two-axis control. Flexible structural models were developed using a high fidelity, flight tested NASTRAN model of the MMS, coupled with a NASTRAN model of the SIRTF telescope. Modal significance criteria were employed to reduce the structural model. Multivariable interactive techniques were used to synthesize the control system (including the structural filters). Control system performance for the SIRTF operational modes (quiescent inertial hold, slewing, nodding, and rastering) was then determined using both single-axis and three-axis simulations). The control system described met performance requirements for all modes but the raster with the use of CMGs. The raster performance was limited by the structural flexibility.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AAS PAPER 86-031
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Dual keel Space Station payload pointing system design and analysis feasibility study (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A Space Station attached Payload Pointing System (PPS) has been designed and analyzed. The PPS is responsible for maintaining fixed payload pointing in the presence of disturbance applied to the Space Station. The payload considered in this analysis is the Solar Optical Telescope. System performance is evaluated via digital time simulations by applying various disturbance forces to the Space Station. The PPS meets the Space Station articulated pointing requirement for all disturbances except Shuttle docking and some centrifuge cases.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Acquisition, Tracking, and Pointing II; Jan 14, 1988 - Jan 15, 1988; Los Angeles, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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