Flight Mechanics, Flight Control and Aeroelasticity

Systematic energy management for flight with electric propulsion to conserve resources (STELAR)

Introduction

In the joint project STELAR, a general aviation aircraft is being optimized and adapted to the requirements of an electric propulsion system. The project is based on the findings from previous research projects on flight strategies, the development of safety-critical software in small teams and new powertrain concepts. The project of the Technische Universität Berlin is helping to make a contribution to more environmentally friendly aviation within the joint project STELAR.

Goals

TU Berlin develops a guidance function that incorporates the current status of the drive components and the atmospheric conditions into the trajectory planning. This leads to a reduction in emissions and an increase in range, which is essential for electric aircraft. The function is validated in flight simulator tests and hardware-in-the-loop tests. Basis for these developments is a model-based approach. A modular simulation environment has been created on the basis of models of aerodynamics and the propulsion system. An energy-optimized and therefore resource-conserving trajectory control system for the general aviation is being developed using this simulation environment.

As part of the project STELAR, the Institute of Aeronautics and Astronautics at the Technical University of Berlin is making a contribution to more environmentally friendly aviation.

Tasks of the TU Berlin

  1. Modular simulation environment:
    Development of a modular simulation environment for the integration of various powertrain components, flight missions and aerodynamics into the simulation. The simulation environment is also used to design the STELAR function.
  2. STELAR-function:
    Development of an energy management function (STELAR function) and the necessary design tools and methods. The function calculates path guidance and control commands for automatic flight or for display to the pilot during manual flight with Flight-Director, so that the aircraft is controlled in an energy-optimal manner during the entire flight.
  3. Development of an human-machine interface in the cockpit for the operation and display of the current status of the STELAR function, as well as the display of the command as flight director.
  4. A HIL test setup is planned for testing the STELAR function and the human-machine interface.

Scientific Publications

The TUB is currently working on the STELAR function. The following publications have been produced for this purpose:

DLRK 2023:

H. Spark, Y. Gazmawe, F. J. Silvestre; TU Berlin, DE. “Coupling of a Trajectory Optimisation Strategy to Local Optimal Setpoints for Electric Aircraft” DLRK 2023, Stuttgart

AIAA SciTECH 2023:

Henrik Spark, Pedro J. González Ramirez, Christopher Ruwisch, Wolfram Meyer-Brügel and Flávio J. Silvestre. "Development and Experimental Testing of Flight Path Control using Total Energy Control and SISO Control Loops," AIAA 2023-0104. AIAA SCITECH 2023 Forum. January 2023. https://doi.org/10.2514/6.2023-0104

DLRK  2021:

H. Spark, P. J. González, C. Ruwisch, W. Meyer-Brügel and F. J. Silvestre, “An Assessment of Aircraft Control via SISO Control Loops and Total Energy Control”, DLRK 2021 (online, Lilienthal-Oberth e.V., Bonn, 2022). https://doi.org/10.25967/550216

Partners

  • Alexander Schleicher GmbH
  • APUS Aviation Engineering GmbH

Funding

Project Duration: 11/2020 – 11/2024           

LuFo VI-1

Room F 341

Ansprechpartner

Organization name Flight Mechanics, Flight Control and Aeroelasticity
Office F 5
Room F 341

Fachgebietsleitung

Prof. Dr.

Flavio Jose Silvestre

flavio.silvestre@tu-berlin.de

Organization name Flight Mechanics, Flight Control and Aeroelasticity
Office F 5

Sekretariat

Organization name Flight Mechanics, Flight Control and Aeroelasticity
Office F 5
Room F 337