Backstepping Sliding Model Control for Seeker Coordinator Based on Nonlinear Disturbance Observer

Zhang, Chenda; Qi, Rong; Erhao, Liu

doi:10.23919/icems52562.2021.9634282

Cited by 3 publications

References 9 publications

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An adaptive predefined time sliding mode control for uncertain nonlinear cyber-physical servo system under cyber attacks

Riaz,

Li,

et al. 2024

Sci Rep

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Malicious attacks are often inevitable in cyber-physical systems (CPS). Accuracy in Cyber physical system for position tracking of servos is the major concern now a days. In high precision industrial automation, it is very hard to achieve accuracy in tracking especially under malicious cyber-attacks, control saturations, parametric perturbations and external disturbances. In this paper, we have designed a novel predefined time (PDT) convergence sliding mode adaptive controller (PTCSMAC) for such kind of cyber physical control system. Main key feature of our control is to cope these challenges that are posed by CPS systems such as parameter perturbation, control saturation, and cyber-attacks and the whole system then upgrade to a third-order system to facilitate adaptive control law. Then, we present an adaptive controller based on the novel PDT convergent sliding mode surface (SMS) combined with a modified weight updated Extreme Learning Machine (ELM) which is used to approximate the uncertain part of the system. Another significant advantage of our proposed control approach is that it does not require detailed model information, guaranteeing robust performance even when the system model is uncertain. Additionally, our proposed PTCSMAC controller is nonsingular regardless of initial conditions, and is capable of eradicating the possibility of singularity problems, which are frequently a concern in numerous CPS control systems. Finally, we have verified our designed PTCSMAC control law through rigorous simulations on CPS seeker servo positioning system and compared the robustness and performance of different existing techniques.

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An adaptive predefined time sliding mode control for uncertain nonlinear cyber-physical servo system under cyber attacks

Riaz,

Li,

et al. 2024

Sci Rep

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Electromechanical coupling modeling and fractional-order control of the seeker stabilization platform

Song,

Li,

Zhang

2024

Sci Rep

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To address the electromechanical coupling and multi-source disturbance problems of the seeker stabilized platform, this paper constructs an electromechanical coupling model of the seeker stabilized platform based on the Lagrange-Maxwell equation. To mitigate the influence of electromechanical coupling on the control performance of the seeker, a super-twisting controller based on a fractional-order terminal sliding mode surface (FOSTSMC) is proposed. Additionally, to handle various disturbances in the system, this paper introduces a method that combines the extended state observer (ESO) with the proposed controller to enhance the system’s stability and anti-disturbance performance. The Lyapunov function is designed to prove that the proposed controller can reach a convergence state within finite time. Finally, the proposed control method is compared with PID control, fuzzy PID control, linear sliding mode control, and super spiral control combined with a disturbance observer (DOB). Multiple simulation experiments demonstrate that, under the influence of electromechanical coupling and multi-source disturbance, the FOSTSMC-ESO significantly improves the stability and anti-disturbance performance of the seeker stabilization platform.

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Control of a Radar Seeker using Fuzzy Type-2 PID Controller

Taslimian,

Zahiripour

2024

2024 10th International Conference on Control, Instrumentation and Automation (ICCIA)

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Backstepping Sliding Model Control for Seeker Coordinator Based on Nonlinear Disturbance Observer

Cited by 3 publications

References 9 publications

An adaptive predefined time sliding mode control for uncertain nonlinear cyber-physical servo system under cyber attacks

An adaptive predefined time sliding mode control for uncertain nonlinear cyber-physical servo system under cyber attacks

Electromechanical coupling modeling and fractional-order control of the seeker stabilization platform

Control of a Radar Seeker using Fuzzy Type-2 PID Controller

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