Seminar Series

Inertial Navigation Systems: The Heart of Aerospace Guidance, Navigation and Control


Professor Michael Braasch


Thomas Professor of Engineering, School of Electrical Engineering and Computer Science, Ohio University, USA Principal Investigator, Avionics Engineering Center, Ohio University; Visiting Erskine Fellow, 2017 Semester 2

Time & Place

Fri, 22 Sep 2017 14:00:00 NZST in E14, Engineering Core block


Inertial navigation systems (INS) are modern technologically sophisticated implementations of the age-old concept of dead reckoning. The basic philosophy is to begin with a knowledge of initial position, keep track of speed and direction, and thus be able to determine position continually as time progresses. Perhaps surprisingly, the rise of satellite-based navigation (e.g., GPS) has actually expanded the need for inertialbased systems. Accelerometers and gyroscopes are the basic sensors utilized and since INS are essentially self-contained, they do not suffer from interference or unavailability that can affect radio-based systems such as GPS. Furthermore, INS are highly complementary to GPS since they provide high data rates, low data latencies and attitude-determination along with position and velocity. This presentation will highlight the basic principles of operation, describe key error characteristics and conclude with some current research results that relate to the safety-critical impact of the Earth’s gravity models utilized within INS.