Shankar, Uday J.2014-03-142014-03-141985-05-05etd-11152013-040350http://hdl.handle.net/10919/45736The method of singular-perturbation analysis is applied to the determination of range-fuel-time optimal aircraft trajectories. The problem is shown to break down into three sub-problems which are studied separately. In particular, the inner layer containing the altitude path-angle dynamics is analyzed in detail. The outer solutions are discussed in an earlier work. As a step forward in solving the ensuing nonlinear two-point boundary-value problem, linearization of the equations is suggested. Conditions for the stability of the linearized boundary-layer equations are discussed. Also, the question of parameter selection to fit the solution to the split boundary conditions is resolved. Generation of feedback laws for the angle-of-attack from the linear analysis is discussed. Finally, the techniques discussed are applied to a numerical example of a missile. The linearized feedback solution is compared to the exact solution obtained using a multiple shooting method.x, 67 leavesBTDapplication/pdfIn CopyrightLD5655.V855 1985.S527Singular perturbations (Mathematics)Trajectory optimizationThesishttp://scholar.lib.vt.edu/theses/available/etd-11152013-040350/