MIT team finds that the ratio of component atoms is vital to performance.
Killian Court was the backdrop for three flying craft: an airplane, a crow and MIT's robotic helicopter at dawn Monday morning.
The airplane just happened to fly by and the crow entertained during a lull in the action, but the real event was the flight of the five-foot-long helicopter.
About 20 people gathered at 6:30 a.m. in the chilly morning air to film, photograph or simply watch as MIT researchers and a professional pilot turned on the helicopter and flew it some 30 feet into the air. There it hovered for a while under its own control as the team yelled over the whir of rotors, "It's on automatic."
Late last year the craft became the first helicopter to perform an autonomous acrobatic maneuver (a 360-degree aileron roll, or corkscrew-like maneuver). Since that news was announced last month (see MIT Tech Talk, Feb. 13), many media have inquired about the work. In particular the French science show "E=M6," which had already planned a trip to MIT in early March, asked if it could get a live demo of the helicopter.
The researchers, led by Associate Professor Eric Feron of the Department of Aeronautics and Astronautics, complied. Responding to an invitation from the MIT News Office, reporters from Channels 4 and 5, the Associated Press, The Metro, MIT Video Productions and of course "E=M6" were on hand to see the demonstration and interview the researchers. MIT Campus Police were also informed; Officer Tony Rosanio appeared to enjoy the show. ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½
Although safety concerns precluded an aileron roll in Killian Court, the vertical flight and autonomous hover were successful. The feat appeared deceptively simple. An attempt on Saturday to perform a similar autonomous maneuver had to be aborted due to technical problems. Feron and colleagues were in the lab until about 2 a.m. Monday correcting an overly sensitive altimeter.
In a week or so the team hopes to fly the helicopter in Killian Court once more. This time, however, the machine will be outfitted with a video camera so it can take "bird's eye" views of the Institute. The researchers have found that a vibration isolation system developed to protect the robot's computer equipment also makes for blur-free footage from an attached camera.
Key members of the MIT helicopter team are Feron, who also is affiliated with the Laboratory for Information and Decision Systems; Vladislav Gavrilets, an aeronautics and astronautics (aero/astro) doctoral student who is chief engineer for the helicopter project; Bernard Mettler, a postdoctoral associate; and aero/astro graduate student Ioannis Martinos. Alumni Kara Sprague (S.B. 2001) and Alex Shterenberg (M.Eng. 2001) wrote much of the code necessary to fly the craft.
Other colleagues on the project who attended Monday's demonstration are Raja Bortcosh, the professional pilot at the controls during takeoff and landing, and Bert Wagner of Advanced Aerials, who has worked with the team on the camera platform for the craft.
"To have the first aerobatic robotic aircraft is phenomenal--plain and simple," said Wagner.
A version of this article appeared in MIT Tech Talk on March 6, 2002.