A control strategy for Coriolis and centrifugal effects reduction in an inertial system test equipment

Modern systems for navigation, localization and guidance are increasingly making use of aiding data provided by additional non-inertial sensors. Test procedures for such hybrid systems often require simultaneous multi-axis motion simulators. It is crucial for this simulator to provide precise angular rate and positioning. However, this accuracy can be significantly affected by coupling between axes in case of multi-axis motion. This paper discusses how such coupling occurs and which methods may be implemented to mitigate the impact of this coupling in order to enhance the motion accuracy. The presented results demonstrate how an appropriate control strategy reduces drastically the coupling on rate and position stability, allowing for improved inertial systems testing.