The free polar motion of the triaxial rigid Earth

The earth's rotation is common in astronomy and geoscience research,the research has important theoretical and practical significance.For example,the research of Earth's rotation rate and a polar motion related to ground-based observations to determine the precise location of the astrospace,as well as the the point of terrestrial reference system in the space,which is precision ground mapping and tracking spacecraft needed parameters.Based on the earth's rotation Euler kinematical equations and Euler dynamical equations on a triaxial rigid Earth's rotation,introduced the process of solving the earth's rotation of a rigid earth.Moreover,indicated that if the preliminary condition of Earth rotation is ensured,then there only is a normal model with regard to free wobble of triaxial rigid Earth rotation.