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Traditional Mars patrol detectors rely on wheels to roll and cannot travel in reverse. They cannot detect the low-gravity and dangerous terrain of small planets such as asteroids or comets to carry out exploration missions. NASA Jet Propulsion Laboratory and Stanford University and Massachusetts Institute of Technology jointly developed a new concept robot named “Hedgehog†to develop the surface detection capabilities of small celestial bodies.
In June 2015, Stanford University and the Jet Labs each completed a prototype of a “Hedgehogâ€. They completed four flight tests using NASA’s C-9 aircraft to study the effects of two prototypes on different materials in a microgravity environment. Maneuverability. Simulating a variety of surface environments with different materials, such as sand, rough rocks, ice slopes, and thin ice, for the first time demonstrated that the “Robinia pseudoacacia†prototype has controllable ability to jump and flip under simulated comet surface environment. The difference between the two prototypes is that the Jet Lab uses disc brake pads, and Stanford University uses a friction belt to brake the flywheel. Researchers hope to take this opportunity to understand the pros and cons of different brake systems.
The "Hedgehog" prototype has 8 spines and 3 flywheels. The mass of the platform is about 5 kilograms. After carrying a camera, spectrograph, etc., the total mass is more than 9 kilograms. The shape is a cube. Each side can be used for landing. Because there are no wheels, it depends. The surrounding thorns jump or tumbling on the surface of the celestial body and rely on the internal flywheel to brake. These thorns are also thermal probes that measure the surface temperature of the celestial body.
"Hedgehog" can make use of one or two thorns to achieve long-distance jumps, and can also achieve short-distance travel by flipping one face. In future missions, the "hedgehog" will first jump to a target area by long-distance jumps, and then slowly approach the target by flipping. In the parabolic flight test, the researchers also confirmed that "Hedgehog" can jump from the surface and get rid of unfavorable terrain such as sand pits.
Researchers are investigating the autonomous detection capabilities of “black locust†and using the mothership relay data on orbit around the target celestial body, similar to the relationship between patrols and orbiters on Mars. The manufacturing cost of the “hedgehog†is lower than that of traditional patrols, and the cubic configuration is also more portable. The mothership can release multiple “hedgehogs†at one time or in stages to carry out exploration missions in specific regions.
“Hedgehog†is one of the second phase projects in NASA's innovative advanced concept plan. It provides funding for R&D and testing of the NASA Center Innovation Fund and the Flight Opportunity Project. (China Academy of Aerospace Science and Engineering Li Jinyi)
"Hedgehog" new concept robot birth detection ability is amazing
Science and technology dynamics Mars is one of the eight planets of the solar system and is ranked fourth in the order of near and far from the sun. Among the eight planets of the solar system, Mars is also the planet closest to Earth except Venus. In recent years, with the development of actual science and technology, space exploration activities have become a field of strength in various countries. Following the lunar exploration boom, Mars has become the focus of the countries of the world this year.