Open AccessNonlinear Extended State Observer based Active Disturbance Rejection Control of a Laser Seeker System
Author(s) -
Abdellah Ferdjali,
Taki Eddine Lechekhab,
Stojadin M. Manojlović,
Momir Stanković,
Rafał Madoński,
Dimitrije Bujaković
Publication year - 2021
Publication title -
defence science journal/defence science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.198
H-Index - 32
eISSN - 0976-464X
pISSN - 0011-748X
DOI - 10.14429/dsj.71.15798
Subject(s) - control theory (sociology) , active disturbance rejection control , state observer , nonlinear system , tracking (education) , transient (computer programming) , stability (learning theory) , engineering , observer (physics) , control engineering , control system , computer science , control (management) , artificial intelligence , physics , psychology , pedagogy , electrical engineering , quantum mechanics , machine learning , operating system
In this paper, the laser seeker control problem is solved in the framework of active disturbance rejection control (ADRC). The considered problem, which consists of laser seeker stabilisation and target tracking, is expressed here as a regulation problem. A nonlinear extended state observer (NESO) with varying gains is used to improve the performance of linear ESO (LESO), and thus enable better control performance in both transient period and steady-state, with lower control effort. Based on a detailed analysis of system disturbances, a special ADRC tuning method is proposed. The stability of the overall control structure is analysed with a description function method. Through comparative simulations LESO-based and the introduced NESO-based ADRC for the laser seeker system, the advantages of the proposed scheme are shown.