On the inertial measurement unit using fiber optic gyroscopes

Hirokimi Shingu, Masatoshi Harigae, Toshiaki Tsujii, Kazutoshi Ishikawa, Yoshikazu Miyazawa

Research output: Contribution to journalArticlepeer-review


The Inertial Measurement Unit (IMU) is a principal sensing component of autonomous navigation systems of aerospace vehicles and its technology has been paced by improvement in gyroscope quality. An Inertial Measurement Unit using fiber optic gyroscopes (FOGIMU) is expected to be used for an advanced navigation system for future aerospace vehicles with high-maneuvering characteristics. This paper presents the test-run results of the FOGIMU which is planned to be used for flight evaluation of the DGPS-INS hybrid navigation system at the National Aerospace Laboratory (NAL). First, system integration of the FOGIMU is briefly reviewed and summarized. Next, functions and operations of the FOGIMU are shown, focusing on application to the navigation system. Third, the measurement performances of gyroscopes (FOGs) and accelerometers (FRAs : force rebalanced accelerometers) are shown, along with the model of signal transmission in the FOGIMU, including the interfaces. Fourth, the around test results of navigation performance of the FOGIMU are shown. Finally, it is concluded that the FOGIMU satisfies the conditions necessary for constructing the hybrid navigation system.

Original languageEnglish
Pages (from-to)1641-1650
Number of pages10
JournalAdvances in the Astronautical Sciences
Volume93 PART 2
Publication statusPublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


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