Affiliation:
1. University of Chinese Academy of Sciences, No.19, Yuquan Rd., Beijing 100049, China
2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Abstract
The accuracy of the line-of-sight of aviation photoelectric optoelectronic stabilization platforms is limited by two factors: external disturbance and sensor noise. An extended state observer (ESO) can effectively improve their anti-interference ability. However, due to the serious problem of gyroscope noise, further improvement of an ESO’s disturbance suppression effect is limited. This article proposes a control structure that combines a Kalman filter (KF) and ESO, effectively improving upon the interference suppression ability of a traditional ESO under the influence of noise. Firstly, an ESO was used to observe the lumped disturbance of the system, and then, the observed disturbance was compensated for in the control loop. Secondly, based on the compensation servo control system, the state equation of the system was reconstructed using a Kalman filter. Finally, the reconstructed filtered state variables were iterated onto the universal state observer, achieving the observation of disturbances while filtering out sensor noise. Under the conditions of a laboratory flight simulation turntable, the line-of-sight stability accuracy level was improved under disturbance excitation. It can be seen that the combination of a Kalman filter and extended disturbance observer proposed in this project improves the ESO’s anti-interference ability under the influence of noise.
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference39 articles.
1. Inertially stabilized platforms for optical imaging systems;Masten;IEEE Control Syst. Mag.,2008
2. Inertially stabilized platform technology;Hilkert;IEEE Control Syst. Mag.,2008
3. Control systems for mobile Satcom antennas;Debruin;IEEE Control Syst. Mag.,2008
4. Acquistion and Position Control for inter-satellite Laser Communications;Guelman;IEEE Trans. Aerosp. Electron. Syst.,2004
5. Research and implementation of data processing method for the three-axis stabilized platform airborne gravity measuring system;Luo;Geophys. Geochem. Explor.,2019