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158

Flight System Dynamics

Trajectory Optimization

The trajectory optimization research group gladly wel-

comed respected researchers, among them Associate

Professor Sébastien Gros of Chalmers University of

Technology, who held a well visited series of lectures on

‘Advanced Topics in Optimal Control’.

Furthermore, Professor Joseph Z. Ben-Asher from

Technion University returned for a visit under the TUM

August-Wilhelm Scheer Visiting Professorship Program.

Besides his inspiring lecture on the application of game

theory in aerospace, we made big steps forward in our

joint research topic on optimization and optimal control

based flight control law testing. This method employs

nonlinear optimization algorithms to find ‘worst-case’

system inputs (pilot commands, disturbances) and

parameters that may drive the system to or beyond the

safety boundaries, additionally providing information on

the sensitivity of distinct parameters.

Optimal trajectory to avoid an obstacle

ATM research was continued by developing extended

bilevel algorithms to determine the optimal arrival times

and trajectories. These results will build the foundation of

a new research project starting in 2018.

Within the VaMEx-CoSMiC project, the goal of the trajec-

tory optimization research group was to develop an online

trajectory generation module for path following including

obstacle avoidance. Therefore, a custom online optimal

control tool has been developed. The algorithm has been

implemented and tested onboard a hexacopter.

The skOPTing project focused on determining optimal

trajectories for ski jumpers is ongoing. The current devel-

opment stage is the system identification using optimal

control methods. Data will be obtained during measure-

ment campaigns scheduled for this winter.

A new research project within the scope of the Munich

Aerospace Scholarship Program aims at optimizing the

atmospheric reentry trajectory of a capsule to minimize

heating on or in the vehicle. All projects employ the

in-house developed optimal control tool Falcon.m (www.

falcon-m.com).

Projects

■■

Robust dynamic programming approach to aircraft

control problems with disturbances (DFG)

■■

Optimal control methods in ski jumping (IGSSE)

■■

Valles Marineris Explorer (VaMEx) – Cooperative swarm

navigation, mission and control (CoSMiC) (DLR)

■■

Optimierung des Wiedereintritts zur Minimierung der

Aufheizung oder der Infrarotsignatur (Munich Aero-

space)