Semi-physical experimental study of adaptive disturbance rejection filter approach for vibration control of a flexible spacecraft

Abstract

Adaptive disturbance rejection filter (ADRF) approach, an active vibration control for flexible spacecraft, is developed and its parameters are identified using a closed-loop system method. Particularly, semi-physical experimental study of a maneuvering spacecraft equipped with a flexible manipulator is implemented to demonstrate the improvement of the attitude control performance. The control system consists of two main parts: (1) optimal input shaper is applied to the flexible manipulator to suppress the vibration and alleviate the effect of the vibration on the spacecraft; (2) ADRF is presented to mitigate the equivalent periodic disturbance caused by the nonlinear coupling between the spacecraft motion and the manipulator vibration. The disturbance frequency adaptation tracks the frequency of the periodic disturbance using adaptive notch filter, and the obtained frequency is then fed to disturbance rejection filter. The ADRF approach can provide optimal sets of gains based on the characteristics of the system. The semi-physical experimental results show that the frequency tracking method works quite well to be used in a real-time controller. The results also indicate that the ADRF can provide significant vibration reduction and improve the attitude control accuracy of the spacecraft body.

Sliding mode predictive vibration control of a piezoelectric flexible plate

“…Dey et al (2014) proposed an auto-tuning proportional-derivative (PD) controller to improve the overall performance under load disturbance. Chu et al (2015) investigated an adaptive disturbance rejection filter approach to mitigate the equivalent periodic disturbance caused by the non-linear coupling between the spacecraft motion and the manipulator vibration. Fan et al (2019) investigated a sliding mode control (SMC) augmented with uncertainty and disturbance estimator (UDE) and hysteresis compensator for piezoelectric actuators to achieve high tracking performance while maintaining robustness.…”

Adaptive model-free constrained control of postcapture flexible spacecraft: a Euler–Lagrange approach

“…Hu and colleagues investigated few different adaptive sliding mode control schemes along with active vibration compensations for flexible spacecraft in Hu and Ma (2005) and Hu and Xiao (2011). Chu et al. (2015) executed semi-physical experimental tests for vibration control of a spacecraft equipped with a flexible manipulator using an adaptive disturbance rejection filter.…”