Inertial navigation system random error suppression technology by biaxial rotary modulation
A dual-axis rotation, inertial navigation system technology, applied in the field of inertial navigation, can solve problems such as affecting the accuracy of navigation and positioning, and achieve the effect of improving the accuracy of fixed speed and attitude
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Embodiment 1
[0037] A dual-axis rotation modulation inertial navigation system random error suppression technology, the specific implementation steps are as follows:
[0038] Step 1. Select parameters, including damping coefficient and angular frequency parameters, and design the external horizontal damping network;
[0039] Step 2. Design a rotation scheme for dual-axis rotation modulation, and compare the simulation results of different spin-to-stop schemes to determine the best scheme;
[0040] Step 3. Input the information obtained by the measurement of the inertial device into the part of the dual-axis rotation modulation system to obtain the navigation information that removes the constant value error and the slowly changing error;
[0041] Step 4. Input the navigation information obtained in step 3 and the external velocity information obtained by the Doppler log into the external horizontal damping network part to calculate the navigation result.
[0042] The external horizontal d...
Embodiment 2
[0075] The present invention relates to a random error suppression technology of dual-axis rotary inertial navigation system based on external horizontal damping. Based on the error model of marine dual-axis rotary modulation fiber optic gyro inertial navigation system, a random error suppression technology based on external horizontal damping is proposed. . This algorithm can not only suppress the navigation errors caused by the constant errors of the three axial inertial devices, but also suppress the influence of random errors on the navigation system, which improves the accuracy of the navigation system by more than 3 times.
[0076] Taking ships as an example, due to the needs of navigating at sea, ships have strict requirements on the navigation accuracy of the navigation system under long-term working conditions. However, due to the measurement error of the inertial device and other reasons, the error of the navigation system is accumulated over time, accounting for abo...
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