Disturbance Observation and Suppression in an Airborne Electro-Optical Stabilized Platform Based on a Generalized High-Order Extended State Observer
Lu Wang, Xiantao Li, Zhanmin Zhou, Yuzhang Liu, Zongyuan Yang, Shitao Zhang, Chong Li
TL;DR
This paper introduces a new observer method to better estimate and suppress periodic disturbances in airborne stabilization systems.
Contribution
A generalized high-order extended state observer is proposed to improve estimation of sinusoidal disturbances.
Findings
GHOESO outperforms traditional ESO in estimating known frequency sinusoidal disturbances.
Experimental results on a hexapod swing table confirm the improved disturbance suppression capability.
The method is effective for both single and compound disturbances.
Abstract
Active disturbance rejection control (ADRC) is widely used in airborne optoelectronic stabilization platforms due to its minimal reliance on the mathematical model of the controlled object. The extended state observer (ESO) is the core of ADRC, which treats internal parameter variations and external disturbances as total disturbances, observes the disturbances as extended states, and then compensates them into the control loop to eliminate their effects. However, the ESO can only achieve a precise estimation of constant or slowly varying disturbances. When the disturbance is periodically changing, satisfactory results cannot be obtained. In this paper, a generalized high-order extended state observer (GHOESO) is proposed to achieve the precise estimation of known frequency sinusoidal disturbance signals and improve disturbance suppression levels. Through numerical simulations, a…
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Taxonomy
TopicsAdvanced Control and Stabilization in Aerospace Systems · Adaptive Control of Nonlinear Systems · Extremum Seeking Control Systems