Ground testing method for position accuracy and orientation accuracy of POS (Position and Orientation System)

Abstract

The invention discloses a ground testing method for the position accuracy and orientation accuracy of a POS (Position and Orientation System), and relates to a method for testing the position accuracy and orientation accuracy of the POS by using a three-axis precision revolving table. The method comprises the following steps of: arranging an inertia measuring unit (IMU) in the POS on the three-axis precision revolving table; under the condition that the three-axis precision revolving table is leveled and points to the north, realizing rotation of a position shaft of the IMU by 180 degrees androtation of a transverse rolling shaft by 0 degree to + / -20 degrees to 0 degree for six times by using the revolving table; simulating a typical flight path of a plane during aviation shooting measurement; and calculating an RMS (Root Mean Square) error and a STD (System Test Design) error between a position angle and a horizontal orientation angle output by the POS based on a high-accuracy position angle and horizontal orientation angle information provided by the revolving platform. The ground testing method has the characteristics of high accuracy, easiness, practicability and low cost, and can be used for testing the position accuracies and orientation accuracies of various POSs on the ground.

Description

technical field [0001] The invention relates to a ground test method for accurately measuring the azimuth accuracy and attitude accuracy of a position and orientation measurement system (Position and Orientation System, POS) by using a precision turntable. Background technique [0002] The aerial remote sensing system is a strategic high-tech technology that uses aircraft as a carrier to obtain large-scale, high-precision, and multi-level space information on the earth's surface and its surface layer. It plays a major role in national economic construction and national security. and fiercely competitive technical fields. [0003] When the aerial remote sensing system performs high-resolution imaging, the load is required to move in a straight line with a uniform velocity and a stable attitude in space. However, the aircraft is affected by external disturbances such as gusts and turbulence, which makes the load inevitably deviate from the ideal trajectory, resulting in seriou...

AI Technical Summary

Problems solved by technology

This test method must be combined with remote sensing loads for flight tests to test the azimuth accuracy and attitude accuracy of POS. The test is complex, costly, and long-term, and the confidence of this test method is affected by the accuracy of remote sensing loads.

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