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  • 1
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    Space shuttle staging simulation (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The overall capability is described and delineated of a new digital computer program for simulation of space shuttle vehicle staging maneuvers. The important distinctive feature of the program is that it enables simulation of linkage-type separation devices (as well as all the more usual types) and includes the effects of interference aerodynamics and thrust impingement. A general flow description and a moderately detailed description of the major simulation components are presented. Some typical simulation results are shown, and the flexibility and growth potential of the basic simulation are discussed.
    Keywords: SPACE VEHICLES
    Type: NASA-TM-X-64631
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
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    Variable Structure PID Control to Prevent Integrator Windup (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: PID controllers are frequently used to control systems requiring zero steady-state error while maintaining requirements for settling time and robustness (gain/phase margins). PID controllers suffer significant loss of performance due to short-term integrator wind-up when used in systems with actuator saturation. We examine several existing and proposed methods for the prevention of integrator wind-up in both continuous and discrete time implementations.
    Keywords: Computer Programming and Software
    Type: System Theory (SSST 99); Mar 21, 1999 - Mar 23, 1999; Auburn, AL; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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