Simulation of trajectory parameters of object motion in pole areas using quasi-geodetic coordinates

Автор: Ablyasova Sofiya
Сборник: Proceedings of the Chinese-Russian "Navigation and Motion Control" Youth Forum 2024
Год издания: 2024
Место издания: Concern CSRI Elektropribor, JSC, St. Petersburg, Russia
Первая страница: 91
Последняя страница: 93
Аннотация: The task of simulating the trajectory parameters of an object - coordinates, linear velocity components, attitude angles, and "ideal" readings from inertial sensors such as angular rate sensors and accelerometers when the object is moving above or below the pole - is needed for testing onboard navigation algorithms of inertial navigation systems, such as strapdown inertial navigation system (INS). The unique aspect of the simulation problem mentioned is that traditional parameters such as longitude and heading cannot be used in relevant models, as these parameters are not defined for points lying on the axis of Earth's rotation. It has been demonstrated that this simulation can be performed using the quasi-Greenwich coordinate system, quasi-geodetic (or quasi-geocentric) coordinates, and quasi-angles of orientation, instead of the traditional ones. The zero test of inertial dead reckoning algorithms when the trajectory of an object crosses the axis of Earth’s rotation confirms the proposed solution to the problem.
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