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Mission Mars

Mission Mars. ENTRY, . DESCENT. AND. LANDING. What are we going to Talk about?. ?. What are we going to Talk about?. History of Landers. What are we going to Talk about?. History of Landers How do these Landers work?. What are we going to Talk about?. History of Landers

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Mission Mars

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  1. Mission Mars ENTRY, DESCENT AND LANDING

  2. What are we going to Talk about? ?

  3. What are we going to Talk about? • History of Landers

  4. What are we going to Talk about? • History of Landers • How do these Landers work?

  5. What are we going to Talk about? • History of Landers • How do these Landers work? • Primary Lander Configuration

  6. What are we going to Talk about? • History of Landers • How Do these Landers work? • Primary Lander Configuration • Emphasis on the Aero shell design, using MER.

  7. History of Mars Landers • SOVIET UNION Lander Aero shell Design Aero braking to 600 m/s Deployment of Parachutes Descent with Retro rockets Failure

  8. History of Mars Landers • United States Orbital Entry Aero shell Design Aero braking Parachute Deployment Retrorocket Soft landing on Legs( On Mission)

  9. Science Behind the Landing • Type of entry procedures • Ballistic Entry • Double Dip Entry • Aero – braking

  10. Ballistic Method • Thick Heat Shield • Steep angle of flight, greater deceleration with high accuracy. • The disadvantage

  11. Double Dip Method • Double Dip entry, takes advantage of the lift of the vehicle to make two decelerating dips into the atmosphere • the heat transferred is more gradual, allowing the use of a thinner heat shield that relies on radiating the heat

  12. Aero Braking • Multiple passes through the atmosphere to gradually slow the vehicle. • the dynamic nature of planetary atmospheres, resulting in uncertainty about the state of the atmosphere at the time of entry.

  13. Aeroshell Entry Vehicle

  14. Aeroshell

  15. The Aeroshell • Heat Shield • The Backshell

  16. Heat Shield • Protects the ship from intense heat from entry.

  17. Backshell • a parachute (stowed at the top of the backshell) • an Inertial Measurement Unit (IMU) • three large solid rocket motors called RAD (Rocket Assisted Descent), • three small solid rockets called TIRS

  18. Composition of Backshell • the aeroshell is made out of an aluminum honeycomb structure sandwiched between graphite-epoxy face sheets. • Outside covered with a layer of phenoic compound.

  19. Albator • It is specially formulated to react chemically with the Martian atmosphere during entry and essentially take heat away, leaving a hot wake of gas behind the vehicle. • instead of being painted, the backshell will be covered with a very thin aluminized mylar blanket to protect it from the cold of deep space.

  20. I.M.U • IMU Inertial Measurement Unit • Northrop Grumman • LN200S

  21. Parachute • Mission Requirements (Load) • System Composition • System Operation (Automatic Deployment)

  22. Rocket Assisted Descent • Pathfinder Manufacture: Zirkol • MER Manufacturer ATK. • 1 ton thrust in 3 sec • 30- 50 feet atmospheric hover.

  23. Transverse Impulse Rocket System • Implementation: Trajectory correction in flight during descent. ATK manufactured.

  24. Airbags • Robust Design • Multi-bladder • Material

  25. Video

  26. Questions Pics: Nasa.gov

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