Precision estimation simulation method based on middle-long distance central axis vector intersection attitude measurement

Abstract

The invention provides a precision estimation simulation method based on middle-long distance central axis vector intersection attitude measurement. The method comprises the following steps: acquiring a target yaw angle and a pitch angle corresponding to a simulation demand section; projecting a center axis three-dimensional vector after attitude rotation to two observation stations to obtain corresponding two-dimensional vectors and image plane inclination angles; according to the focal lengths of the observation stations and the two-dimensional vectors, acquiring the object distance of the two observation stations and the observation station center axis imaging length corresponding to the target center axis, and then acquiring the image dip angle interpretation maximum error angular quantity; calculating the theoretical value of the central axis vector and the dominant error amount of the central axis vector caused by the image plane dip angle error; and finally, acquiring the quantization precision of the actual yaw angle and pitch angle. The method is more convenient, visual and accurate, solves the problem that key parameters are unknown, and provides reliable theoretical support for beforehand station distribution test, precision estimation and postmortem analysis for target range attitude measurement.

Description

technical field [0001] The invention relates to the field of weapon testing and testing, in particular to the field of shooting range optical attitude measurement. Background technique [0002] Attitude parameters play an important role in the flight stability and attack accuracy of the weapon system. Internal testing requires built-in sensors, which will increase the cost of measurement, and the difficulty of receiving signals in low-altitude areas is also one of the disadvantages of internal testing. Optical attitude measurement is an important external measurement method. At present, the optical attitude measurement is mainly implemented by the attitude measurement system, which is generally based on the medium and long distance (the working distance is at least greater than 1 km). Before the attitude measurement is implemented, a test plan needs to be designed, and the accuracy part is difficult to quantify. The main reason is that the traditional accuracy analysis use...

AI Technical Summary

Problems solved by technology

Before the attitude measurement is implemented, a test plan needs to be designed, and the accuracy part is difficult to quantify. The main reason is that the traditional accuracy analysis uses the partial derivative analysis method, and the specific imaging measurement parameters involved are unknown, such as sub-station image plane inclination, intercept, etc., so the accuracy evaluation only depends on The approximate image length formed by the measurement distance is roughly evaluated, which is far from the actual measurement scene, resulting in the lack of necessary theoretical basis for the accuracy of the actual attitude measurement scheme design

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