RTSIN1: A Model of a Strapdown INS on a Two-Axis Rate Table.

摘要

A two-axis rate table is very useful laboratory equipment for testing of strapdown inertial navigation systems (INS). In practice, tables are used both for angular positioning of the INS and for application of angular velocities about one or two axes. In the former, the INS may be aligned at some required attitude, and then rotated to some other attitude, and left there 'navigating' under the influences of gravity and earth rotation only, while its outputs are observed. A series of different such alignments and rotations can be used to deduce information about the system's sensor errors and characteristics. This computer program simulates the outputs of a strapdown INS and the errors in those outputs, when the system is mounted on a two-axis rate table, undergoing a user-specified motion sequence, and when user-specified sensor and system errors are present. The strapdown INS is simulated by SINS1. The program contains a simulation of the rate table, which provides angular velocity and specific force at the reference point of the INS, which may be located at any user specified position relative to the intersection of the table axes, and attitude relative to the table disc. Keywords: Strapped down systems; Computerized simulation. Australia. (edc)