Miniaturized Electron Optic Tracking System On Aerostat

Abstract

In this paper, a miniaturized electron optic tracking system (EOTS) is proposed to improve the disturbance suppression performance when attached to near space aerostat. The electron optic tracking system, widely used in moving platforms can isolate the movement of the carrier and has high stability accuracy. However, the payload weight is limited for near space aerostats. The miniaturization of EOTS can effectively improve load distribution. To satisfy the demand of lightweight, micro-electro-mechanical system (MEMS) accelerometer is used in EOTS instead of fiber-optic gyroscopes (FOG). This paper employs position and acceleration double close-loop control method with MEMS linear accelerometer to improve the system performance especially in medium frequency. Meanwhile the disturbance observer (DOB) is introduced to suppress the measurably external disturbance. Furthermore, the disturbance performance of the EOTS is verified by MATLAB/Simulink. The results show that the improved miniaturized system can increase the payload of the aerostat effectively when the total load is limited.