Robust approach and landing trajectory generation for reusable launch vehicles in winds
When a reusable launch vehicle (RLV) experiences a failure, it is crucial to recover the vehicle from such failure in real time. Our previous works proposed a scheme of motion primitives (MPs) and neighboring optimal control (NOC) to deal with on-line trajectory reshaping on approach and landing (A&...
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Published in | 2008 IEEE International Conference on Control Applications pp. 930 - 935 |
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Main Authors | , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.09.2008
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Subjects | |
Online Access | Get full text |
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Summary: | When a reusable launch vehicle (RLV) experiences a failure, it is crucial to recover the vehicle from such failure in real time. Our previous works proposed a scheme of motion primitives (MPs) and neighboring optimal control (NOC) to deal with on-line trajectory reshaping on approach and landing (A&L). Furthermore, a robustifying term was introduced to robustify NOC when the failures are severe. Wind speed especially wind shear has been shown to be a greater hazard than had been appreciated, however, the flight safety during A&L has to be treated more seriously when wind effect is included. In this paper, wind effects on robust A&L trajectory generation for RLVs are discussed based on our prior works, namely, neighboring feasible trajectory existence theorem (NFTET) and trajectory robustness theorem (TRT). A straightforward wind effect theorem (WET) will then be investigated. According to WET, the modifications to the NOC approach and robustification can on-line recover those vehicles in winds from some failures even if they are severe. The simulation results verified the conclusions. |
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ISBN: | 9781424422227 1424422221 |
ISSN: | 1085-1992 2576-3210 |
DOI: | 10.1109/CCA.2008.4629595 |