date_range Débute le 13 mars 2019
event_note Se termine le 19 mai 2019
list 8 séquences
assignment Niveau : Intermédiaire
chat_bubble_outline Langue : Anglais
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Les infos clés

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timer 16 heures de cours

En résumé

Space exploration is a very exciting subject. Consider the achievements of Sputnik 1, Yuri Gagarin’s first flight in space, the Apollo missions to the Moon, followed by the Shuttle program, the Hubble Space Telescope launch and maintenance on orbit, and finally the assembly and exploitation of the International Space Station. These were challenging undertakings involving space agencies and industrial teams of several nations, and private companies as well. Space telescopes are in service, and several components of the solar system have been and are still actively visited by a number of unmanned probes and robots providing us with precious knowledge about our space environment as well as the far away Universe.

This course builds on university level physics and mechanics to introduce and illustrate orbital dynamics as is applied in the design of space missions. Simple tools will be provided to allow planning of missions on orbit around Earth or in the Solar System. You will learn from the experience of Claude Nicollier, one of the first ESA astronauts, specifically through his involvement in the Shuttle project and his role in the maintenance of the Hubble Space Telescope on two occasions.

The course focuses on conceptual understanding of space mechanics, maneuvers, propulsion and control systems used in all spacecraft. You will gain knowledge of the challenges related to the use of the space environment as a platform for scientific and utilitarian purposes.

  • Fundamental laws of mechanics and orbital mechanics
  • Orbital maneuvers
  • Types of space missions and their objectives
  • Space environment
  • General concepts of space vehicle architecture
  • Propulsion
  • Attitude determination and control
  • Onboard systems
  • Risk management and reliability
  • Key design elements for successful missions, in particular related to human spaceflight

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Les prérequis

Bachelor level courses in physics, vector analysis, and calculus.

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Le programme

Unit 0 - Introduction to the Course

• Course objectives
• Motivation behind space exploration and utilization
• The space pioneers, and brief history of human space exploration
• The main space agencies in the world
• Space utilization and exploration

Unit 1 - Introduction to Space Environment

• Review of laws of mechanics
• Introduction to the space environment including the transition from the atmosphere to space, microgravity, the electrical and thermal environments, orbital lifetime, space debris and asteroids/comets collision threats

Unit 2 – Introduction to Orbital Mechanics (I and II)

• Orbital Mechanics I - dynamics of spaceflight; concept of gravitational well; orbital motion; Kepler’s Laws; the case of circular orbits
• Orbital Mechanics II - elliptical orbits; reference frames; orbital maneuvers; perturbations of orbital motion; peculiar orbits

Unit 3 - Orbital Mechanics Part III

• Rendezvous in Low Earth Orbit (LEO); relative motion of the chaser vs. the target. Strategy to successfully achieve a rendezvous in LEO

Unit 4 - Orbital Mechanics Part IV

• Interplanetary trajectories; Gravity Assist or Slingshot maneuvers
• Propulsion in space - law of propulsion; concept of specific impulse; types of thrusters; electric propulsion; ascent into space, and re-entry

Unit 5 - Introduction to Space Systems and Space Tethers

• Attitude measurement and control; attitude change; electrical power generation and distribution (overview); thermal balance (overview)
• Space tethers (or cables) as an alternate method to generate electrical power on orbit; Dynamic applications of space tethers, Shuttle-based tether missions
• Reliability; systems redundancy; risk management; safety design for space systems; human rating concept

Unit 6 – The Space Shuttle and the International Space Station (ISS)

• Space Shuttle - concept; design; operations; Challenger and Columbia accidents
• ISS; Soyuz and Progress; Logistic supply to ISS with ATV, HTV, and commercial vehicles

Unit 7 – Special Subjects on Human Spaceflight, and Future of Space Exploration

• Extravehicular Activity (EVA) and space suits, space robotics
• Astronaut training , commercial space , suborbital flights
• Orion and the Space Launch System (SLS)
• Future of Space Exploration and Conclusion
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Les intervenants

Claude Nicollier
Lecturer
École polytechnique fédérale de Lausanne

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Le concepteur

École Polytechnique Fédérale de Lausanne

L’École polytechnique fédérale de Lausanne (EPFL) est une institution universitaire de renommée internationale, spécialisée dans le domaine de la science et de la technologie, située à Lausanne, bien que sur le territoire communal d'Écublens, en Suisse et fondée en 1853, sous le nom d’École spéciale de Lausanne.

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La plateforme

Edx

EdX est une plateforme d'apprentissage en ligne (dite FLOT ou MOOC). Elle héberge et met gratuitement à disposition des cours en ligne de niveau universitaire à travers le monde entier. Elle mène également des recherches sur l'apprentissage en ligne et la façon dont les utilisateurs utilisent celle-ci. Elle est à but non lucratif et la plateforme utilise un logiciel open source.

EdX a été fondée par le Massachusetts Institute of Technology et par l'université Harvard en mai 2012. En 2014, environ 50 écoles, associations et organisations internationales offrent ou projettent d'offrir des cours sur EdX. En juillet 2014, elle avait plus de 2,5 millions d'utilisateurs suivant plus de 200 cours en ligne.

Les deux universités américaines qui financent la plateforme ont investi 60 millions USD dans son développement. La plateforme France Université Numérique utilise la technologie openedX, supportée par Google.

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