Attitude measurement method of spinning projectile based on infrared focal plane array

Abstract

More and more attention has been paid to the infrared attitude measurement of missile because of its independence and anti-interference ability. In order to solve the problem that the installation error is easy to be introduced in the arrangement of conventional three-axis infrared sensors, the attitude measurement model of the infrared focal plane array is established based on the theory of missile-borne infrared attitude measurement. According to the established attitude measurement model of infrared focal plane array, the attitude calculation method of infrared focal plane array sensor is studied from the point of view of numerical value and low-pixel infrared image respectively. And the infrared focal plane array attitude measurement method based on numerical value and low-pixel image is proposed, which not only uses the way of single-axis infrared focal plane sensor array to avoid the installation error caused by the arrangement of multi-axis sensors, but also doesn’t use the method of integral summation in the calculation process to avoid the error accumulation. Finally, the attitude calculation method is verified by the semi-physical experiment, and the calculation errors of pitch angle and roll angle are respectively within ±1.5° and ±1°. The results of this study suggest that the proposed infrared focal plane array attitude measurement method based on numerical value and low-pixel image offers a new and promising approach.