Design of High-precision Airborne SAR Stabilization Platform Based on Active Disturbance Rejection Technology
- Resource Type
- Conference
- Authors
- Zhao, Minghan; Chen, Junshan; Zhao, Guijun; Zhou, Lu; Li, Xiajing
- Source
- 2022 3rd China International SAR Symposium (CISS) SAR Symposium (CISS), 2022 3rd China International. :1-6 Nov, 2022
- Subject
- Aerospace
Computing and Processing
Geoscience
Signal Processing and Analysis
Torque
Atmospheric modeling
Resonant frequency
Observers
Radar antennas
Mathematical models
Aperture antennas
SAR stabilization platform
active disturbance rejection
extended state observer
- Language
An antenna stabilization platform based on active disturbance rejection (ADRC) technology is designed to compensate for the motion disturbance caused by the movement of the antenna beam pointing at the carrier aircraft in synthetic aperture radar (SAR) imaging. In this paper, the unavoidable friction disturbance torque in the stable platform and servo mechanism is analyzed, and the extended state observer is used to compensate for the disturbance torque so as to improve the pointing accuracy. The effectiveness of the algorithm is verified by digital simulation and semi-physical tests. The test results show that the airborne SAR stabilization platform designed with active disturbance rejection technology can effectively improve the pointing accuracy of the SAR antenna, and the performance is improved by more than 30%.