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  • 1
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    Unknown
    Systems analysis of Mars solar electric propulsion vehicles (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Mission performance, mass, initial power, and cost are determined for solar electric propulsion vehicles across a range of payload masses, reference powers, and mission trajectories. Thick radiation shielding is added to arrays using indium phosphide or III-V multijunction solar cells to reduce the damage incurred through the radiation belts. Special assessments of power management and distribution systems, atmospheric drag, and energy storage are made. It is determined that atmospheric drag is of no great concern and that the energy storage used in countering drag is unnecessary. A scheme to package the arrays, masts, and ion thrusters into a single fairing is presented.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: AIAA PAPER 90-3824
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Computer simulation of a 20-kHz power system for advanced launch systems (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The performance of two 20-kHz actuator power systems being built for an advanced launch system are evaluated for typical launch senario using an end-to-end system simulation. Aspects of system performance ranging from the switching of the power electronic devices to the vehicle aerodynamics are represented in the simulation. It is shown that both systems adequately stabilize the vehicle against a wind gust during launch. However, it is also shown that in both cases there are bus voltage and current fluctuations which make system power quality a concern.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: SAE PAPER 931425 , (ISSN 0148-7191); 10 p.|SAE, Aerospace Atlantic Conference & Exposition; Apr 20, 1993 - Apr 23, 1993; Dayton, OH; United States
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Computer simulation of a resonant dc link for advanced launch systems (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The performance of a resonant dc link based actuator power system being built for an advanced launch system application is evaluated for a typical launch scenario using two end-to-end system simulations, one using a digital computer and the other using a hybrid computer. Aspects of system performance from the switching of the power electronic devices to the vehicle aerodynamics are addressed. Using these simulations, it is shown that the resonance dc link actuator adequately stabilize the vehicle against a wind gust during a launch.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: SAE PAPER 931424 , SAE, Aerospace Atlantic Conference & Exposition; Apr 20, 1993 - Apr 23, 1993; Dayton, OH; United States|(ISSN 0148-7191); 8 p.
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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