The development of the requirements for sensing elements, including angular velocity sensors, is one of the most important aspects of designing strapdown inertial navigation systems (SINS). The assumption of certain level of accuracy meeting the requirements of navigation and orientation is restricted by simplified sensors error models. In many cases quasi-permanent values are used. Their dynamic changes are not taken into consideration. Nowadays one of the ways for increasing SINS accuracy level is the detailed description of the sensors error model and a more careful analysis of sensors error model components impact on SINS. A reasonably detailed analysis can be accomplished by the SINS simulation.