High-precision real-time attitude measurement device and method based on antenna turret

Abstract

The invention discloses a high-precision real-time attitude measurement device and method based on an antenna turret, and belongs to the technical field of real-time directional attitude measurement.The high-precision real-time attitude measurement device and method an inertial measurement unit, a double-shaft turntable and a test upper computer, wherein the double-shaft turntable simulates the use environment of the antenna turret, is electrically connected with the inertial measurement unit and drives the inertial measurement unit to rotate; and the test upper computer is electrically connected with the inertial measurement unit and is used for sending a control instruction and carrying out data acquisition and data processing at the same time. In order to meet the requirements of smallsize and real-time performance of attitude measurement at the same time, a pure strapdown inertial measurement unit without a built-in transposition mechanism is adopted, the size and weight of equipment can be effectively reduced by canceling the built-in transposition mechanism, and meanwhile, a flexible link of the transposition mechanism between an IMU and a base is removed, so that the real-time performance of attitude measurement of the inertial measurement unit can be improved; and in order not to reduce the alignment precision of the inertial measurement unit, the antenna turret is utilized to perform rotation modulation of two-position rotation and stop, so that a high-precision directional attitude measurement function is realized.

Description

technical field [0001] The invention relates to the technical field of real-time directional attitude measurement, and more specifically, to a high-precision real-time attitude measurement device and method based on an antenna turret. Background technique [0002] Strapdown inertial measurement unit (hereinafter referred to as "inertial unit") is widely used in azimuth and attitude measurement equipment on rockets, missiles, aircraft, etc. In order to improve the accuracy of orientation and attitude measurement, three high-precision laser gyroscopes and quartz The flexible accelerometer constitutes an inertial measurement unit (hereinafter referred to as "IMU"), which performs comprehensive calculations based on the angular velocity component of the earth's rotation sensed by the gyroscope and the gravity component sensed by the accelerometer to obtain the north azimuth and attitude angle. [0003] In the traditional strapdown inertial group, the IMU is directly connected to...

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Problems solved by technology

[0003] In the traditional strapdown inertial group, the IMU is directly connected to the carrier, and the alignment accuracy is greatly affected by the zero offset of the inertial device. Most of the existing strapdown inertial groups install the IMU on the built-in indexing mechanism. The alignment technology can be divided into coarse alignment In the two stages of alignment and fine alignment, the influence of the zero bias of the inertial device is offset by the rotation modulation method of multi-position rotation and stop, and high-precision azimuth and attitude information are obtained. However, this structure has a large volume and weight and is not suitable for antenna rotation. Tower attitude measurement

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