A fpga hardware realization method of attitude measurement system

Abstract

The invention provides an FPGA (field programmable gate array) hardware implementation method of an attitude measuring system, which aims at solving the problem of attitude angle measurement mistakes directly caused by the precession phenomenon of a vertical gyro in a visual attitude measuring system based on the vertical gyro and a CCD (charge coupled device) linear array. According to the method, the precession phenomenon, which is caused by acceleration, of the vertical gyro can be eliminated by reasonably configuring a mechanical structure of the visual attitude measuring system. In the consideration of possible processing errors in practice, the invention also provides a compensation method based on an FPGA platform for the influence caused by the precession movement of the vertical gyro on attitude measurement. According to the FPGA hardware implementation method, the technical problem of the attitude angle measurement mistakes directly caused by the precession phenomenon of the vertical gyro in the existing visual attitude measuring system based on the vertical gyro and the CCD linear array is effectively solved; the measuring method has important application prospects in the fields of instrumental landing of airplanes, unmanned plane landing and carrier landing.

Description

technical field [0001] The invention relates to a method for measuring Euler angle (attitude) based on a CCD line array, and belongs to the categories of measurement and control technology, flight mechanics and the like. Background technique [0002] Attitude measurement can determine the relative motion attitude of the carrier, which is the basis of all control methods, is of great significance to the normal operation of the aircraft, and is a key factor affecting flight safety. In the attitude calculation system of the aircraft, especially the strapdown inertial navigation system, the attitude calculation method needs to integrate the angular rate in principle, so the small deviation of the angular rate gyro will continue to accumulate in the results of the attitude calculation. As for the serious error of the attitude angle caused in a short time. [0003] In order to correct the error of the attitude angle, the traditional methods have the following categories. One is ...

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Problems solved by technology

[0004] Aiming at the problem that the precession phenomenon of the vertical gyroscope in the existing attitude visualization measurement system based on the vertical gyroscope and CCD linear array will directly lead to the error of the attitude angle measurement, the present invention proposes an FPGA hardware implementation method of the attitude measurement system , this method eliminates the phenomenon of vertical gyro precession caused by acceleration by rationally configuring the mechanical structure of the attitude visualization measurement system. Influence of Attitude Measurement and Compensation Method Based on FPGA Platform

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