Off-optimum timing of interplanetary midcourse guidance maneuvers
✍ Scribed by T.B. Murtagh
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 711 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0005-1098
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✦ Synopsis
The nature of the approximate solution to the optimum midcourse maneuver scheduling problem is such that only the times qf the first and last maneuver are sensitive toperturbation about their optimal values.
Summary--The nature of the optimum solution with respect to the timing of interplanetary midcourse guidance maneuvers is investigated. The analysis provides a realistic cost function, defined as the sum of the root-mean-square midcourse maneuvers, for both the fixed-time-of-arrival and the variable-time-of-arrival guidance logics and uses the time of the last maneuver as a functional constraint. The results of the analysis indicate that only the timing of the first and of the last maneuvers is sensitive to perturbation about the optimal values and that a variation in the timing of the intermediate maneuvers produces small changes in the total midcourse velocity requirement.