The original alignment precision impacts directly on the precision of the INS (inertial navigation system). The time used in original alignment processing is an important military tactics technique index of the INS.
Three autonomy” (autonomous function test, autonomous error calibration, autonomous original alignment) technique makes the platform cast off heavy ground equipments and complicated ground operation, improves mobility and speed of response of vehicle remarkably, and reduces cost for development and launching notably, and so it has important use value.
Having studied the inertial alignment methods based on the classical controltheories, the thesis realizes horizontal alignment and azimuth alignment by using output feedback control, establishes the system error equation, and proposes the determination method of system parameters.
discusses the theory of high accurate north-seeking with double free dimension flexible gyroscope and accelerometer ,infers the north-seeking calculate-formula with error compensation , achieves fast and exact inertial alignment with result of the north-seeking ,and test shows the results are satisfying ;
A fast and accurate initial alignment method for strapdown inertial navigation system on stationary base
Consequently, the speed and accuracy of the SINS's initial alignment is enhanced greatly.
Application of H∞ filtering in the initial alignment of strapdown inertial navigation system
In this paper, the principle of H∞ filtering is discussed and H∞ filter is constructed, which is used in the initial alignment of the strapdown inertial navigation systems (SINS).
We suggest that this particular behaviour results from the degeneracy of differentL states in hydrogenic systems and an observable influence of a surface electric field modifying the initial alignment via Stark effect.