Transfer alignment method based on adaptive compensation H infinite filter

Abstract

The invention discloses a transfer alignment method based on adaptive compensation H infinite filtering. The transfer alignment method comprises the steps: 10) establishing a transfer alignment model;and 20) performing adaptive compensation H infinite filtering on the transfer alignment model established in step 10) to estimate a misalignment angle to complete the transfer alignment. The transferalignment method ensures the stability of a filter in the transfer alignment process and improves the transfer alignment accuracy.

Description

technical field [0001] The present invention relates to a transfer alignment method, in particular to a transfer alignment method based on adaptive compensation H infinite filtering. Background technique [0002] Initial alignment is critical for strapdown inertial navigation systems. A large part of the performance of a strapdown inertial navigation system depends on the speed and accuracy of the initial alignment. According to different alignment modes, initial alignment can be divided into self-alignment, combined alignment and transfer alignment. Compared with self-alignment and combined alignment, the transfer alignment process is faster and the alignment time can be greatly shortened. In transfer alignment, when the precision of the main inertial navigation device is very high, the sub-inertial navigation can obtain higher alignment accuracy. Based on the above advantages, transfer alignment has been widely used in aircraft, ships and vehicles. [0003] Traditional...

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Problems solved by technology

This requires dynamic adjustment of the size of the robust factor, so the method of fixing the size of the robust factor in the H infinite filter has certain limitations in an unknown dynamic environment

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