Trajectory Shaping by the U-Parameter Design Method

This paper is concerned with the application of U-parameter design method to a problem of "trajectory shaping." Three linearized models are assumed for an unpowered vehicle with modelling errors introduced by variations in flight path angle. Corresponding to the three linearized models, three controllers, which are used in different flight phase, are designed by U-parameter theory. The three controllers guarantee that the vehicle motion, during its approach to target point, is robustly stable and is optimal at the nominal flight path in the sense that the step error response of resultant feedback control system is minimal in the mean square sense. Digital simulation results show that U-parameter design method can be successfully used to the problem