Accurate Control for Gimbal System of Single Gimbal Control Moment Gyro Based on Nonlinear Cascade Extended State Observer

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Hou, Lin^1 ; Li, Haitao^1 ; Shi, Yangyang^1 ; Song, Peng^1

School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China^1

关键词: Coupling torque;    Extended state observer;    Nonlinear cascades;    Nonlinear friction;    Servo control systems;    Single gimbal control moment gyros;    Single gimbal control moment gyros (SGCMG);    Unmodeled disturbances;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/4/042081/pdf
DOI  :  10.1088/1755-1315/252/4/042081

来源: IOP

【 摘 要 】

The nonlinear friction, unmodeled disturbance and coupling torque caused by the movement of satellite are the main factors limiting the angular speed accuracy in gimbal system of the single gimbal control moment gyro (SGCMG). Consequently, a high-precision servo control system based on the nonlinear cascade extended state observer (NCESO) is established in this paper in order to reduce the influence of those disturbances and improve the output angular velocity accuracy of the gimbal system. The simulation results confirmed the feasibility and effectiveness of the proposed method.