Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

How to find the orbital needle in the celestial haystack

02.02.2006


On 2 February experts from across the world meet at ESA to discuss how to best calculate spacecraft orbits. Even though the space age is now 49 years old, determining the optimal trajectories for spacecraft is a far from easy task.



People often have trouble deciding which is the best route to take on a car journey. In space the problems are much worse. Space missions are constrained by certain factors such as the thrust of the rocket used to launch the spacecraft, the celestial object you want to reach and the time at which you want to get there. When working out the best trajectories within such constraints, engineers all have different strategies.

... mehr zu:
»Earth


“Ask ten engineers for the best orbit for a particular spacecraft and you’ll get ten different ideas,” says Dr. Dario Izzo, a researcher on mission analysis in the Advanced Concepts Team at ESA’s European Space and Technology Research Centre (ESTEC) in the Netherlands. Each one of these missions will be the best for a certain reason, so the question becomes: what’s the best of the best? One of the proposed trajectories or another that no-one has thought of?

In other words, orbits are like needles in a haystack. Search hard enough and you’ll find one, but is it the best one in the haystack? That’s where the new technique of global optimisation comes in. It is a method of handling complex problems with many variables that has lots of solutions. But there are many techniques for global optimisation and they are difficult to compare since they seldom use the same constraints when applied.

To compare and contrast different techniques, ESA’s Advanced Concepts Team, supported by ESOC, launched a competition. They issued a challenge to space engineers across the world to find an intercept trajectory that delivered as much energy as possible to the asteroid 2001 TW229.

Twelve teams, from the US, China, Russia and Europe submitted their respective best solution. Izzo’s job was to rank the proposals according to how much energy each mission could impart to the asteroid. “The inspiration for this competition was asteroid deflection, a problem we have been working on quite thoroughly” says Izzo. Whilst asteroid 2001 TW229 presents no danger to Earth, issuing a call for trajectories simulated a step that would be taken in the event that a potentially dangerous asteroid were to be discovered. The key to the mission would be to deliver the largest push possible, in time for it to do the most good.

The top ranked trajectory went to a team from the United States’ Jet Propulsion Laboratory (closely followed by two Spanish teams). Their amazing trajectory involved seven planetary flybys, mostly of the Earth but including Venus, Jupiter and Saturn that literally smashed the spacecraft into a head-on collision with the asteroid.

The teams will now meet in the Netherlands to discuss their individual approaches to the problem. “The response to the competition was excellent. At the meeting we will discuss the different methods used and identify the ones that have proven the most promising,” says Izzo.

In fact, the response to the competition was so good that the Advanced Concepts Team also hope to run future competitions, to further stimulate research in the exciting field of mission analysis.

Dario Izzo | alfa
Weitere Informationen:
http://www.esa.int/gsp/ACT/news_GOcomp-work.htm

Weitere Berichte zu: Earth

Weitere Nachrichten aus der Kategorie Physik Astronomie:

nachricht Rätselhaftes IceCube-Ereignis könnte von Tau-Neutrino stammen
19.06.2018 | Johannes Gutenberg-Universität Mainz

nachricht Ein neues Experiment zum Verständnis der Dunklen Materie
14.06.2018 | Max-Planck-Institut für Radioastronomie

Alle Nachrichten aus der Kategorie: Physik Astronomie >>>

Die aktuellsten Pressemeldungen zum Suchbegriff Innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: AchemAsia 2019 in Shanghai

Die AchemAsia geht in ihr viertes Jahrzehnt und bricht auf zu neuen Ufern: Das International Expo and Innovation Forum for Sustainable Chemical Production findet vom 21. bis 23. Mai 2019 in Shanghai, China statt. Gleichzeitig erhält die Veranstaltung ein aktuelles Profil: Die elfte Ausgabe fokussiert auf Themen, die für Chinas Prozessindustrie besonders relevant sind, und legt den Schwerpunkt auf Nachhaltigkeit und Innovation.

1989 wurde die AchemAsia als Spin-Off der ACHEMA ins Leben gerufen, um die Bedürfnisse der sich damals noch entwickelnden Iindustrie in China zu erfüllen. Seit...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: Li-Fi erstmals für das industrielle Internet der Dinge getestet

Mit einer Abschlusspräsentation im BMW Werk München wurde das BMBF-geförderte Projekt OWICELLS erfolgreich abgeschlossen. Dabei wurde eine Li-Fi Kommunikation zu einem mobilen Roboter in einer 5x5m² Fertigungszelle demonstriert, der produktionsübliche Vorgänge durchführt (Teile schweißen, umlegen und prüfen). Die robuste, optische Drahtlosübertragung beruht auf räumlicher Diversität, d.h. Daten werden von mehreren LEDs und mehreren Photodioden gleichzeitig gesendet und empfangen. Das System kann Daten mit mehr als 100 Mbit/s und fünf Millisekunden Latenz übertragen.

Moderne Produktionstechniken in der Automobilindustrie müssen flexibler werden, um sich an individuelle Kundenwünsche anpassen zu können. Forscher untersuchen...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: ALMA entdeckt Trio von Baby-Planeten rund um neugeborenen Stern

Neuartige Technik, um die jüngsten Planeten in unserer Galaxis zu finden

Zwei unabhängige Astronomenteams haben mit ALMA überzeugende Belege dafür gefunden, dass sich drei junge Planeten im Orbit um den Säuglingsstern HD 163296...

Alle Focus-News des Innovations-reports >>>

Anzeige

Anzeige

VideoLinks
Industrie & Wirtschaft
Veranstaltungen

LymphomKompetenz KOMPAKT: Neues vom EHA2018

19.06.2018 | Veranstaltungen

Simulierter Eingriff am virtuellen Herzen

18.06.2018 | Veranstaltungen

Künstliche Intelligenz – Schafft der Mensch seine Arbeit ab?

15.06.2018 | Veranstaltungen

VideoLinks
Wissenschaft & Forschung
Weitere VideoLinks im Überblick >>>
 
Latest News

New material for splitting water

19.06.2018 | Physics and Astronomy

Cementless fly ash binder makes concrete 'green'

19.06.2018 | Materials Sciences

Overdosing on Calcium

19.06.2018 | Health and Medicine

Weitere B2B-VideoLinks
IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics