Working method of strap-down magnetic inertia combination system

Abstract

The invention relates to a working method of a strap-down magnetic inertia combination system. In the method, a signal conditioning module filters and amplifies an angular rate signal and a sine signal; an acquisition module carries out analog / digital conversion for the angular rate signal and the sine signal conditioned by the signal conditioning module, sends the sine signal to a first resolving module, and outputs the angular rate signal to a second resolving module; according to the sine signal, the first resolving module resolves a roll angle gamma and roll angle rate omega x; according to the angular rate signal and the roll angle rate omega x, the second resolving module resolves an azimuth angle psi and a pitching angle theta; and an output module is used for outputting the roll angle gamma, the azimuth angle psi and the pitching angle theta. For the measurement of the roll angle rate, the working method does not use the prior angular rate gyro, but directly uses a geomagnetic roll angle measuring unit to resolve the roll angle and the roll angle rate of a rotary bomb; and because the position of the roll angle can be directly acquired, the integral accumulated error brought by integral acquisition position quantity is avoided.

Description

technical field [0001] The invention belongs to the field of navigation technology measurement and relates to a working method of a strapdown magnetic-inertial combination system. Background technique [0002] The strapdown inertial navigation system has been maturely explored since the early 1960s. Especially in 1969, the strapdown inertial navigation system was used as an emergency backup device for the "Apollo"-13 lunar landing spacecraft. It played a decisive role in the successful guidance of the spacecraft to the orbit back to the earth, which became a milestone in the development of the strapdown inertial navigation system. Since the 1970s, great progress has been made in the technology of inertial sensors and inertial navigation systems, and various types of inertial sensors (such as laser gyroscopes, fiber optic gyroscopes, dynamic tuning gyroscopes, etc.) have been successfully developed, and obtained a wide range of applications. In terms of system technology, t...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the system is complex, the ineffective weight is increased, and part of the rudder resources are sacrificed

The United States is researching an angular rate gyroscope with a measurement range of 3600° / s and a scale factor error of less than 5PPM, but the cost problem is difficult to solve in the short term

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