Mighty Eagle

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Mighty Eagle
Mighty Eagle lander flying Aug 8 2012.jpg
Mighty Eagle lander
OperatorNASA
Spacecraft properties
Spacecraft typeLander testbed
ManufacturerNASA
Dry mass207kg
Dimensions4ft height, 8ft diameter
Start of mission
Entered serviceJune 13, 2011
End of mission
DeactivatedDecember 2013
Payload
3D camera

The Mighty Eagle (also known as the Ethan Chapman) is a prototype robotic lander developed by NASA at the Marshall Space Flight Center in Huntsville, Alabama. [1]

Contents

The vehicle is an autonomous flying testbed that is used for testing hardware, sensors and algorithms. These sensors and algorithms include such things as onboard cameras that, with specialized guidance, navigation and control software, could aid in the capture of orbiting space debris, in-space docking with a fuel depot, docking of a robotic lander with an orbiting command module and the rendezvous of multiple unmanned stages for deep space human exploration of the Solar System. [2]

History

Initial software and hardware development were done on precursor vehicle called the Cold Gas Test Article which used compressed air as a propellant and had about 10 seconds of flight time. The knowledge gained from this development and testing was used in the design of the Mighty Eagle. [3]

The Mighty Eagle prototype lander was developed by the Marshall Center and Johns Hopkins University Applied Physics Laboratory. Key partners in this project include the Von Braun Center for Science and Innovation, the Science Applications International Corporation, Dynetics Corporation and Teledyne Brown Engineering. [1]

The design of the vehicle began in late 2009 and integration was completed in January 2011. The vehicle was transported to an indoor test facility and bolted to the ground for initial testing, followed by free flight testing. Outdoor testing at another facility ran from August to November 2011. In 2012, a test area at MSFC was developed and the Mighty Eagle tested "Autonomous Rendezvous and Capture" technology. In 2013, enhancements were made including legs that are lighter by about 6.8 kg (15 lbs), a 3D stereo camera that allows the detection and avoidance of 3D (three dimensional) objects and an onboard image processor in preparation for "hazard avoidance" testing. [4] [5]

In July 2013 a hazard field (test area for the lander) consisting of 200 tons of lunar simulant began construction at the Marshall Space Flight Center. [6]

In August 2013 the hazard field was completed. The 3D camera was installed in an enclosure on the vehicle permitting the camera to be pointed at three different angles. [7]

After many tests (described below) the Mighty Eagle lander was put into "organization and storage" in December 2013. [8] Information from the NASA Robotic Lunar Lander Development Project (aka Mighty Eagle) was merged into the Lunar CATALYST initiative. [9]

The lander is named after the Mighty Eagle character, who originated from the Angry Birds video game. [10]

Specifications

Three-legged "green" lander: [1]

For additional information see the Robotic Lunar Lander information pages. [1] [16]

Engines

Main thruster of the NASA Mighty Eagle Main thruster of the NASA Mighty Eagle.jpg
Main thruster of the NASA Mighty Eagle

The NASA Mighty Eagle produces thrust by the violent decomposition of hydrogen peroxide (H2O2) using silver as a catalyst. [17]

Peroxide decomposition catalyst plate in main thruster Peroxide decomposition catalyst plate in main thruster.jpg
Peroxide decomposition catalyst plate in main thruster

Testing

Prior to the flight tests, each subsystem was testing individually including the propulsion system. [11]

Flight tests in 2011

Summer 2012 tests

"These lander tests provide the data necessary to expand our capabilities to go to other destinations". [1]

2013 tests

A hazard field test area that simulates the lunar surface, including boulders, is being prepared. [27] Amongst the test software and hardware modifications was procurement of a quadcopter whose WIFI camera can film midflight. [28]

Further details about the tests and hardware can be found in the "Mighty Eagle: The Development and Flight Testing of an Autonomous Robotic Lander Test Bed" article in Johns Hopkins APL Technical Digest. [12]

See also

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References

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