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Home > Reference > Research and information: general > Research methods: general > A Study to Evaluate Sts Heads-Up Ascent Trajectory Performance Employing a Minimum-Hamiltonian Optimization Strategy
A Study to Evaluate Sts Heads-Up Ascent Trajectory Performance Employing a Minimum-Hamiltonian Optimization Strategy

A Study to Evaluate Sts Heads-Up Ascent Trajectory Performance Employing a Minimum-Hamiltonian Optimization Strategy


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About the Book

A study was conducted to evaluate the performance implications of a heads-up ascent flight design for the Space Transportation System, as compared to the current heads-down flight mode. The procedure involved the use of the Minimum Hamiltonian Ascent Shuttle Trajectory Evaluation Program, which is a three-degree-of-freedom moment balance simulation of shuttle ascent. A minimum-Hamiltonian optimization strategy was employed to maximize injection weight as a function of maximum dynamic pressure constraint and Solid Rocket Motor burnrate. Performance Reference Mission Four trajectory groundrules were used for consistency. The major conclusions are that for heads-up ascent and a mission nominal design maximum dynamic pressure value of 680 psf, the optimum solid motor burnrate is 0.394 ips, which produces a performance enhancement of 4293 lbm relative to the baseline heads-down ascent, with 0.368 ips burnrate solid motors and a 680 psf dynamic pressure constraint. However, no performance advantage exists for heads-up flight if the current Solid Rocket Motor target burnrate of 0.368 ips is used. The advantage of heads-up ascent flight employing the current burnrate is that Space Shuttle Main Engine throttling for dynamic pressure control is not necessary. Sinha, Sujit Marshall Space Flight Center...


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Product Details
  • ISBN-13: 9781722149345
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 279 mm
  • No of Pages: 56
  • Spine Width: 3 mm
  • Width: 216 mm
  • ISBN-10: 1722149345
  • Publisher Date: 06 Jul 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 154 gr


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A Study to Evaluate Sts Heads-Up Ascent Trajectory Performance Employing a Minimum-Hamiltonian Optimization Strategy
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