Department of Aerospace Engineering

Guidance, Control, and Astrodynamics Seminar Series: "Constrained Predictor-Corrector Entry Guidance," Songbai Xue, visiting Ph.D. candidate at ISU.

Songbai Xue

Songbai Xue

Visiting Ph.D. candidate at ISU

Thursday, October 15, 2009
4:10 PM
1235 Howe Hall

Constrained Predictor-Corrector Entry Guidance

In this paper we develop a numerical predictor-corrector entry guidance algorithm for vehicles with medium to higher lifting capability. A major difference between the current algorithm and existing predictor-corrector algorithms is that the current algorithm has the ability to enforce all inequality trajectory constraints commonly seen in entry light. The enabling mechanism is the so-called quasi-equilibrium glide condition (QEGC). The QEGC allows convenient translation of the path constraints in the velocity-altitude space into the energy-dependent upper and lower bounds for the magnitude of the bank angle. As such, the algorithm is able to enforce the path constraints without suffering the usual side effects of increasing complexity and degraded robustness. Another unique feature of the current algorithm is on-line adaptation of a parameter in the lateral guidance logic so that the final heading alignment offset is tightly regulated. Extensive dispersion simulation results are presented to demonstrate the effectiveness and precision of the algorithm

Bio
Get the bachelor degree at Beijing University of Aeronautics and Astronautics.  Currently is a visiting Ph.D. candidate at ISU working with Professor Ping Lu.  Research aspect is entry guidance and control.