Epson IMU Adopted by JAXA for “Int-Ball2“ Free-flying Camera Robot Used on ISS Japanese Experiment Module

时间： 2024-04-11 来源：EPSON News

技术问答

Seiko EPSON Corporation (TSE: 6724, "Epson") is pleased to announce that an inertial measurement unit (IMU) from Epson's M-G370 series was selected by the Japan Aerospace Exploration Agency (JAXA) for use in a mobile camera robot deployed on "Kibo", the Japanese Experiment Module (JEM) on the International Space Station (ISS). Developed by JAXA, the "Int-Ball2 (Internal Ball Camera 2)" free-flying camera robot, has been undergoing functional verification inside Kibo since June 2023.

From fiscal 2024 onward, Epson will pursue the development of IMUs for the so-called "New Space" sector. These IMUs will be used in things such as small satellites that utilize consumer and industrial products, which require higher levels of cost performance and shorter delivery times.

Int-Ball2 during flight checkout© JAXA/NASA

Int-Ball2 is an onboard drone robot that aims to support astronauts on the ISS. It is operated remotely by ground control and is able to fly around the ISS taking photos and videos. The camera is used to capture images of the astronauts as they conduct various experiments and are shared with the ground control team. Currently, the astronauts working in Kibo have to spend time adjusting the camera settings and angle of view. With the Int-Ball2, the ground control team can directly control the video shooting process remotely. This is expected to significant reduce the astronaut workload.

While aboard the ISS, Japanese astronaut Satoshi Furukawa worked with ground controllers to perform initial functional checks on Int-Ball2.

Astronaut Satoshi Furukawa and Int-Ball2 as it docks at the docking station© JAXA/NASA

Int-Ball2 is designed to automatically depart and return to its docking station for recharging. but in the ISS, it must navigate in a micro-gravity environment.

To do so, it is required to estimate its 3DoF position (X, Y, Z) and 3DoF rotational attitude (roll, pitch, and yaw). Int-Ball2 estimates its position by fusing Visual Simultaneous Localization and Mapping (VSLAM) and IMU data. JAXA has successfully demonstrated Int-Ball2's flight capabilities as well as functional confirming the automated release and docking.

The Epson IMU used in Int-Ball2 testing is a small, lightweight, yet extremely precise device that helps estimate spatial position and rotational attitude during its flight.

IMU inside Int-Ball2© JAXA/MEISEI

Main features of the M-G370 series

Uses an original crystal gyroscopic sensor for high precision and stability

Gyro bias instability 0.8°/√h Angle random walk 0.06-0.03°/√h

Compact and lightweight (1" square and 10 grams)

Low power design (3.3 V, 16 mA)

M-G370T connector face

M-G370T marking face

In February 2024, the new M-G370PDT, with improved angle random walk and linearity of the gyroscopic sensor, was added to the series lineup. The M-G370PDT can be used in the building of various applications.

Sample applications

Vibration control for small satellites1 that use commercial and industrial products, EO/IR camera gimbals2, and antennas
Vibration, angle, and orbit measurements for unmanned equipment (industrial drones, terrestrial vehicles, ocean bottom exploration probes) and industrial equipment
Navigation systems

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本文由咪猫转载自EPSON News，原文标题为:Epson IMU Adopted by JAXA for "Int-Ball2" Free-flying Camera Robot Used on ISS Japanese Experiment Module，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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