News Release
November 03, 2021
Sumitomo Precision Products Co., Ltd.

Announcement of development on a Small & Redundant Inertia Measurement Unit (IMU)For Inertial Navigation System using MEMS Gyroscope & Accelerometer
Sumitomo Precision Products Co., Ltd. has developed a MEMS Small & Redundant Inertial Measurement Unit (IMU)“MRN-01” jointly with Japan Aerospace Exploration Agency (JAXA).
MRN-01 is the Inertial Measurement Unit (IMU) using commercial electric partsand developed for inertial navigation (a method to calculate its position andvelocity by integral calculus of gyroscope* and accelerometer measurements) andattitude control of launch vehicles, satellites and rovers in space environment.

Itachieves a low cost initiative to develop a high accuracy MEMS gyroscope widelyused in industry in order to replace ring laser gyroscopes widely used for inertial
navigation of launch vehicles.

We have improved the digital temperaturecompensation and the MEMS sensor head characteristics of best in class our MEMS
silicon ring vibration gyroscope to maintain highly accurate inertial measurements inspace environment. As a result, the MRN-01 has achieved over 10 times higher

Small Inertial
Measurement Unit
“MRN-01”

accuracy than conventional MEMS gyroscopes.
Equipment for a launch vehicle needs to be resistant to such a high vibration, wide temperature range, a severe radiation
environment.

In response to those requirements, the MRN-01 has been developed as one IMU configuration to use two

redundant IMU units in it (tolerant to single failure).

1. Main feature of MRN-01
Using High accuracy MEMS Gyro and MEMS AccelerometerTwo redundant IMU units configuration with mutual data transferTwo redundant MPUs in each IMU unit with mutual monitoring of MPU calculation

One fault operative system as IMU

Low cost IMU using commercial electrical parts with radiation mitigation techniques include
redundant electronic circuits, redundant modules and current monitoring

2. Application of MRN-01
MRN-01 can be used not only launch vehicles but also attitude control of satellites and inertial navigation of rovers.

Toward the promising future, Sumitomo Precision Products will continuously develop MEMS-type gyroscope sensors andinertial sensor systems technology in order to meet customer’s needs and wants.

Sumitomo Precision Products Co., Ltd.
Corporate Planning Department /General Administration Department
1-10, Fuso-cho, Amagasaki, Hyogo 660-0891, Japan
Tel 81-(0)6-6489-5815 / 81-(0)6-6489-5829
Fax 81-(0)6-6489-5809 / 81-(0)6-6489-5801
https://www.spp.co.jp/

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* Gyroscope is an equipment to measure the rotational velocity and used in Inertial Navigation System. There are several
types and the optical type ring laser gyro is the highest accuracy followed by fiber optical type gyroscope then MEMS
type gyroscope.

<Contacts on this product>
Sumitomo Precision Products Co., Ltd.,MEMS Sensors and Systems Department, Business Development Group, Taku Aoki
TEL: +81-6-6489-5917

FAX: +81-6-6489-5910<Reference >Technical data
Weight

1.3 kgSize

152(W)mm × 105(L)mm × 80(H)mm

Power ConsumptionLess than 5W

Gyroscope performance

Range: ±400deg/s
Bias Instability: less than 0.2deg/hAccelerometer performance

Range: ±30G
Bias Instability: less than: 0.09 mg

Output Cycle

100Hz

Power Supply

12VDC±1V

Sumitomo Precision Products Co., Ltd.
Corporate Planning Department /General Administration Department
1-10, Fuso-cho, Amagasaki, Hyogo 660-0891, Japan
Tel 81-(0)6-6489-5815 / 81-(0)6-6489-5829
Fax 81-(0)6-6489-5809 / 81-(0)6-6489-5801
https://www.spp.co.jp/

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