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Improved Algorithms for Strapdown Inertial Navigation System

Author: FangQiang
Tutor: HuangXinSheng
School: National University of Defense Science and Technology
Course: Control Science and Engineering
Keywords: SINS Analytic coarse alignment Considerable measure Coning motion Coning error
CLC: V249.322
Type: Master's thesis
Year: 2009
Downloads: 108
Quote: 2
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Abstract


SINS initial alignment error and navigation solver error on the system navigation accuracy plays a vital role . The thesis is therefore commence from SINS initial alignment technology (mainly analytic coarse alignment and considerable measure ) as well as navigation solution algorithm ( cone algorithm ) . Thesis work are: 1. SINS on stationary base analytic coarse alignment method . Proposed new error analysis method based on the latitude error , and coarse alignment the six combinations alignment method error carried out a detailed derivation and analysis . The results show that Method 2 and 5 of this error results and latitude estimation error contents , while the error ratio of the Method 2 Method 5 to be small , so the method in all alignment method works best . Provides a theoretical basis for this conclusion, the method of choice for the coarse alignment . SINS static base initial time considerable measure . Considerable measure based on observable state estimation error of the first order norm evaluation to analyze the system state variables . 3 of SINS cone algorithm . A two to compute cycles gyro output angular increments and gyro sampling values ??coning error compensation algorithm for classic cone movement , and the new algorithm in the list-like and twin - kind algorithm analysis . The results showed that compensation precision cone movement for low - frequency conditions , this paper proposes a twin - like algorithm compared to the traditional optimization of three sub-sample algorithm can be improved by two orders of magnitude . Page i

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CLC: > Aviation, aerospace > Aviation > Aircraft instrumentation,avionics, flight control and navigation > Flight control system and navigation > Navigation > Navigation system > Inertial navigation system
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