Abstract
A Novel Method for Fast Stationary Initial Alignment Based on Extended Measurement Information
Highlights
The strapdown inertial navigation system (SINS) is an autonomous dead reckoning system that provides the attitude, position and speed for a carrier
Because the equivalent horizontal acceleration output is used as an extended measurement, the horizontal alignment error can be directly estimated from the equivalent output without requiring the first derivative of the velocity error
Based on the coupling relationships between the state variables, extended measurement information was derived in the outputs of equivalent inertial devices
Summary
The strapdown inertial navigation system (SINS) is an autonomous dead reckoning system that provides the attitude, position and speed for a carrier. It is widely used in aerospace, warship, land vehicles, and other deployments requiring navigation and positioning. The main research in this field has focused on observability analysis, error estimation, and error reduction algorithms [2]. In applications such as vehicle weapon systems, satellite launch vehicles and ballistic missiles, it is highly desirable to align without any external assistance. From the perspective of implementation, the self-alignment process is divided into coarse alignment and fine alignment.
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