Acta Photonica Sinica, Volume. 53, Issue 3, 0311002(2024)
Research on Technology of Airborne Optoelectronic Tracking Platform Based on Dual Liquid Crystal Polarization Grating
With the continuous progress of optoelectronic tracking technology, optoelectronic tracking systems, as core components in engineering fields such as laser communication, laser guidance, and space observation, are increasingly widely used in optoelectronic platforms. However, in some special cases, the application of traditional optoelectronic tracking equipment is greatly limited due to factors such as narrow installation space, limited platform load, and higher requirements for tracking accuracy and response speed. The dual grating optoelectronic tracking device is a new type of beam deflection device that rotates two coaxial gratings for beam deflection. This device has the advantages of small rotational inertia, small volume, and high tracking accuracy, and has broad application prospects in fields such as laser communication, laser guidance, and LiDAR. In order to overcome the shortcomings of traditional airborne optoelectronic tracking devices such as large volume and weight, and achieve lightweight of the new airborne optoelectronic tracking platform. A miniaturization and high-precision design has been proposed for an optoelectronic tracking method based on a dual grating beam deflection mechanism applied to airborne platforms.This article establishes a dual grating optoelectronic tracking and aiming platform control system based on Linear Quadratic Regulator (LQR) optimal control, selects two independent rotating liquid crystal polarization gratings placed in parallel along the same axis as the beam deflection actuator , and establishes a beam deflection reverse formula based on line of sight decoupling for target tracking. The three meter collimator is used to simulate the long-distance target , the double grating photoelectric tracking and aiming system is placed on the six degrees of freedom swing table, and the azimuth axis and elevation axis disturbances are applied. The 1 053 nm laser is emitted into the double grating photoelectric tracking and aiming system through the ten meter collimator, and the tracking accuracy is tested.The dual grating optoelectronic tracking and aiming system has successfully completed tracking experiments based on platform disturbances of different frequencies and amplitudes. Through experimental data analysis, it is found that the tracking accuracy of the airborne optoelectronic tracking and aiming system based on the dual grating meets the system design indicators, with a tracking residual RMS (Root mean square) statistical value less than 350
Get Citation
Copy Citation Text
Jifeng ZHANG, Yansong SONG, Junyao WANG, Yang LIU. Research on Technology of Airborne Optoelectronic Tracking Platform Based on Dual Liquid Crystal Polarization Grating[J]. Acta Photonica Sinica, 2024, 53(3): 0311002
Category:
Received: Aug. 23, 2023
Accepted: Nov. 24, 2023
Published Online: May. 16, 2024
The Author Email: SONG Yansong (songyansong2006@126.com)