IRUとは
Inertial Reference Unit 慣性基準装置
https://aerospace.honeywell.com/us/en/about-us/blogs/four-facts-about-inertial-navigation-systems#:~:text=Inertial%20navigation%20systems%20are%20autonomous,as%20they%20are%20self%2Dcontained.
https://www.jae.com/Motion_Sensor_Control/Description/