TY - GEN
T1 - Trajectory planning for a reentry vehicle under failure conditions
AU - Trent, A. D.
AU - Doman, D. B.
AU - Iyer, R. V.
PY - 2007
Y1 - 2007
N2 - In this paper, we discuss the trajectory planning problem for the unpowered approach and landing phase for a reusable launch vehicle. A method for modifying the aerodynamic database so that trim effects are taken into account is presented. This results in a method to take into account 6 degree-of-freedom effects in a reduced order model, that can then be used in trajectory planning problems. We set up the trajectory planning problem as a state-input constrained, fixed end-point, optimal control problem, and apply Pontryagin's minimum principle to obtain first-order necessary conditions. We then present a variation of the modified simple shooting method to solve the resulting two-point boundary value problem. We present results from two numerical examples: (1) a nominal case with no effector failures, and (2) a case where the right ruddervator is failed upward at 3.5°.
AB - In this paper, we discuss the trajectory planning problem for the unpowered approach and landing phase for a reusable launch vehicle. A method for modifying the aerodynamic database so that trim effects are taken into account is presented. This results in a method to take into account 6 degree-of-freedom effects in a reduced order model, that can then be used in trajectory planning problems. We set up the trajectory planning problem as a state-input constrained, fixed end-point, optimal control problem, and apply Pontryagin's minimum principle to obtain first-order necessary conditions. We then present a variation of the modified simple shooting method to solve the resulting two-point boundary value problem. We present results from two numerical examples: (1) a nominal case with no effector failures, and (2) a case where the right ruddervator is failed upward at 3.5°.
UR - http://www.scopus.com/inward/record.url?scp=46449132640&partnerID=8YFLogxK
U2 - 10.1109/ACC.2007.4282306
DO - 10.1109/ACC.2007.4282306
M3 - Conference contribution
AN - SCOPUS:46449132640
SN - 1424409888
SN - 9781424409884
T3 - Proceedings of the American Control Conference
SP - 3868
EP - 3873
BT - Proceedings of the 2007 American Control Conference, ACC
T2 - 2007 American Control Conference, ACC
Y2 - 9 July 2007 through 13 July 2007
ER -