A Method of Aircraft Attitude Measurement Based on Combination of Magnetic Sensors

Abstract

The invention relates to an aircraft attitude measuring method based on magnetic sensor combination. The aircraft attitude measuring method includes the first step of enabling three magnetic sensors to be installed on three coordinate axes of a carrier coordinate system respectively; the second step of obtaining a graph of relation between output shafts on the three magnetic sensors and pitch angles sigma m under the assumption that a yaw angle psi and a roll angle gamma are given; the third step of analyzing the relation of attitude angles of the three output shafts when Msy and Msz obtain a null point and an extreme point, and combining with the graph of relation obtained in the second step to obtain a graph of relation between a pitch angle difference value and the yew angle psi when the Msy and Msz obtain an extreme value; the fourth step of obtaining the pitch angle difference value according to the time when the Msy and Msz reach the extreme value, and comparing the graph of relation, obtained in the third step, between the pitch angle difference value and the yew angle psi to obtain the yew angle psi; the fifth step of obtaining the pitch angles sigma m by combining with the graph of relation obtained in the second step and according to the yew angle psi, and obtaining the roll angle gamma according to the relation of attitude angles obtained in the third step.

Description

technical field [0001] The invention relates to an aircraft attitude measurement method based on a combination of magnetic sensors. Background technique [0002] In the prior art, for the acquisition of aircraft flight attitude parameters, there are many technologies that can be used, such as the sun azimuth test method, inertial measurement combination is to solve the attitude angle of aircraft by measuring the angular velocity of the aircraft; the gyro-free inertial measurement combination is through Measure the acceleration of the aircraft to solve the attitude angle of the aircraft. These methods are completely possible only for the roll angle test of the aircraft, but they require expensive costs, and for high-rotation aircraft, the current micro-inertial devices are still Can not meet the requirements on the range and accuracy. Therefore, it is imminent to develop a low-cost and high-overload-resistant method that can effectively improve the accuracy of projectile att...

AI Technical Summary

Problems solved by technology

It can be seen that although the magnetic sensor has the characteristics of small size, low cost, high sensitivity, strong anti-interference ability, and no accumulated error, but because the three-axis magnetic sensor cannot provide three independent equations, the magnetic sensor can only be used in combination with other sensors. , in the position of auxiliary measurement in the carrier attitude measurement

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