System and method for optical calibration of dynamic navigation capability of inertia measurement unit

Abstract

The invention discloses a system and method for optical calibration of the dynamic navigation capability of an inertia measurement unit. The method of measuring displacement with a single laser displacement sensor and measuring angle with two laser displacement sensors is adopted to measure the displacement and angle of the inertia measurement unit from three dimensions in an external environment where a vibrating table is provided for dynamic navigation capability testing in real time, measured angle and displacement information is compared with an output value of the inertia measurement unit, and then calibration of the dynamic navigation capability of the inertia measurement unit is achieved. By the adoption of the method, non-contact measurement is achieved, output of the inertia measurement unit is measured in real time, bandwidth is large, stability is high, and application prospects are broad.

Description

technical field [0001] The invention relates to an optical calibration system and method for inertial measurement combined dynamic navigation performance, belonging to the field of optical sensing and measurement. technical background [0002] The inertial measurement unit is the core measurement unit of inertial navigation, and its performance determines the navigation accuracy and attitude control accuracy of the carrier. Whether the inertial measurement combination can accurately reflect the actual motion information of the carrier in a dynamic environment is the key to evaluating the performance of the inertial measurement instrument. In order to accurately evaluate the dynamic navigation accuracy and attitude measurement accuracy of the inertial measurement combination under dynamic conditions during the ground test phase, another independent evaluation method needs to be provided to evaluate the navigation and attitude measurement performance of the inertial measuremen...

AI Technical Summary

Problems solved by technology

Disadvantages: low precision, difficult to ensure parallel light, small measurement range, not flexible enough; 3) This method needs to install a reflector on the three mutually orthogonal surfaces of the measured object to achieve specular reflection of the laser , while the PSD realizes the reception of the reflected laser light, the torsion during the vibration process makes the reflected laser light enter different positions of the PSD, by detecting the position change of the reflected laser light, the torsion angle is measured in real time

[0004] With the continuous expansion of the industrial measurement field and the continuous improvement of measurement accuracy and measurement speed, the traditional contact measurement and cannot meet the demand

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