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Ascent Phase Trajectory Optimization of a Generic Launch Vehicle

Lukkana, Varaprasad and Radhakant, Padhi (2008) Ascent Phase Trajectory Optimization of a Generic Launch Vehicle. In: National Systems Conference, IIT-Roorkee, IIT-Roorkee.

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Trajectory optimization of a generic launch vehicle is considered in this paper. The trajectory from launch point to terminal injection point is divided in to two segments. The first segment deals with launcher clearance and vertical raise of the vehicle. During this phase, a nonlinear feedback guidance loop is incorporated to assure vertical raise in presence of thrust misalignment, centre of gravity offset, wind disturbance etc. and possibly to clear obstacles as well. The second segment deals with the trajectory optimization, where the objective is to ensure desired terminal conditions as well as minimum control effort and minimum structural loading in the high dynamic pressure region. The usefulness of this dynamic optimization problem formulation is demonstrated by solving it using the classical Gradient method. Numerical results for both the segments are presented, which clearly brings out the potential advantages of the proposed approach.

Item Type: Conference Paper
Keywords: Trajectory optimization;Launch Vehicle;Gradient method; Dynamic Inversion;Launcher clearance.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 29 Sep 2011 05:07
Last Modified: 29 Sep 2011 05:07
URI: http://eprints.iisc.ac.in/id/eprint/40978

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