Aerospace Instrument-Making Annotation << Back Application of quaternion algorithmes in strapdown inertial systems of orientation and local navigation П.К. Плотников, Ю.В. Чеботаревский, А.А. Большаков, В.Б. Никишин Algorithmes of operation of Strapdown inertial and integrating systems of orientation and navigation for local use, that is to say designed for use in flying vehicle of local aims, in inclinometers, intelligent pigs and other moving objectes have been built. Taking this into consideration quaternion differential equations of orientation, in which angular rates from signals of gyroscopes, correction from signals of accelerometers and magnetometers are brought to the horizontal trihedron axes, are solved separately from equations of positioning. At that the latter are linear differential equations with constant factors. The SISON"s properties are analyzed by the example of Strapdown gyroinclinometer with taking into account the obtained results of mathematical simulation.