Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Sep 20 2018, 11:13 AM
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Hayabusa 2 has started its descent towards Ryugu for Minerva deployment. Real time navigation images are posted here. One new image every half hour or so.
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Guest_mcmcmc_* |
Sep 24 2018, 09:46 AM
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Guests |
Maybe found details about rovers II-1:
QUOTE Some rover packages named MINERVA-II are proposed to install in Hayabusa2 spacecraft. Since the target asteroid parameters may be different from the previous target, the rover design has to be made from the beginning. Technical challenging matters are arisen from the point of the distance from the Sun as well as the surface cruel temperature of low-albedo body. MINERVA in Hayabusa mission <previous mission, previous rover>has two actuators inside in order to move. One of them is used as a torque. By rotating the torque, a reaction force against the asteroid surface makes the rover hop with a significant horizontal velocity. After hopping into the free space, it moves ballistically. Based on this mechanism, by changing the magnitude of torque, the hopping speed can be altered, so as not to exceed over the escape velocity from the asteroid surface. The primary rover <II-1 in Hayabusa 2?> of the packages has the totally same kind of the mobile system[/b]. This time two torquers are aligned orthogonally. By simultaneously rotating the torquers, both the hopping speed and direction are controlled. The hopping speed is basically dominated by the magnitude of torques, while the hopping direction is set by he ratio of two torquers. Intelligent Rover with Hopping Mechanism for Asteroid Exploration Takashi Kubota Institute of Space and Astronautical Science Japan Aerospace Exploration Agency - Sagamihara, Japan Kubota@isas.jaxa.jp Tetsuo Yoshimitsu Institute of Space and Astronautical Science Japan Aerospace Exploration Agency - Sagamihara, Japan kikko@nnl.isas.jaxa.j |
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