Final approach and landing trajectory generation for civil airplane in total loss of thrust

Final approach and landing trajectory generation method was established for the failure of total loss of thrust of the commercial transport aircraft to improve the flight safety. Unpowered final approach and landing trajectory generation problem can be formulated as the 2-dim two point boundary value problems with fixed starting and ending points and an optimal index, being numerically solvable. The trajectory's dimension reduction and trajectory parameter propagation without iteration make the algorithm more adaptive and rapidly. The simulation results show that safe landing trajectories are successfully found for the difference initial speed and aircraft configuration. Furthermore, this method can also be used for guiding the automatic controller or aiding the pilot to cope with emergency unpowered landing.