Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Hayabusa2 MINERVA-II-1 operation, 20-21 September 2018 |
Sep 20 2018, 11:13 AM
Post
#1
|
|
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.
|
|
|
Guest_mcmcmc_* |
Sep 24 2018, 09:05 AM
Post
#2
|
Guests |
I can't find anything about rovers "1", but quite a lot about rover "2".
Next rover (Minerva-II-2) hopping mechanisms which are going to be tested: 1) Eccentric motor, which consists of a brushless DC motor. This actuator enables ROVER2 to micro-hop by the motor’s vibration force 2) Elastic cilia mechanism on the ROVER2 surface fosters micro-hopping capability, and thus this is expected to achieve precise locomotion in a micro-gravity asteroid. (by Kenji Nagaoka, Kazuya Yoshida) Prof Kazuya Yoshida Facebook page (last post: 2014). 3) Magnetic permanent magnet mechanism using a DC brush-less motor. This actuator consists of one movable magnet and two stationary magnets, and enables ROVER2 to hop by the impact force generated when the movable magnet sticks to the stationary magnet. This mechanism provides a large impact force in spite of low power consumption. 4) Metallic and thin leaf spring. The actuator stores preliminarily the elastic energy of the spring by bending it. This enables ROVER2 to hop by the impact force generated when the bending energy releases. The stored bending energy is locked by “tegus” before its driving, and will be released all at once by burning off the tegus. ROVER2 has two metallic springs. Each spring is non-reusable but is highly reliable in harsh space environment because of its simple mechanism. 5) Shape Memory Alloy (SMA). The most advantage of this actuator is that it can work with a change of surrounding temperature. This enables ROVER2 to hop by the impact force generated when the SMA bends in a specific temperature condition. As for safety launch-lock, this is also locked by tegus so as not to drive in an unexpected situation. Unlike the third actuator using leaf springs, this actuator will be able to work semipermanently with temperature shift. 1A2-L08 Design of Environment Driven Rover for Asteroid(Space Engineering and Robotics and Mechatronics(1)) TSUMAKI Yuichi - Yamagata University AKAIKE Takahiro - Yamagata University MINETA Takashi - Yamagata University TADAKUMA Riichiro - Yamagata University 2015.10.24 Mr. Minoda (Takashi Mineta?) gave a lecture on the MEMS device & Hayabusa 2 Jumping Actuator at the Yonezawa Industry Association Chiba Branch (Chiba City) 1P2-N02 Performance Evaluation of Ambient Temperature Driven Bimetall Buckling Actuator for Asteroid Exploration Rover (Space Robot) Takashi Mine , Atsuhisa Sugai , Ryo Kazama , Yuichi Tsumaki "Bimetallic actuator" = のバイメタルアクチュエ "Hayabusa 2" = はやぶさ2 Google for のバイメタルアクチュエ はやぶさ2 5b) ROVER2 employs two different SMA mechanisms so that ROVER2 can move in different temperature ranges. Of particular note that the total weight of these four different types of actuators is just 88.1 g. The simplified system design of MINERVA-II2 enables to result in low cost missions. Development of MINERVA-II2, a Micro-Robot for Asteroid Surface Exploration with Innovative Mobility Nagaoka, K., Tohoku University https://www.dlr.de/pf/Portaldata/6/Resource...t_Nagaoka_K.pdf Minerva-II-2 paper (in Japanese) about camera: http://www.kimura-lab.net/wp-content/uploa...S-2013-4744.pdf Shinichi Kimura (Tokyo University of Science) |
|
|
Lo-Fi Version | Time is now: 7th June 2024 - 08:10 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |