Non-singular fast terminal sliding mode control for roll-pitch seeker based on extended state observers

doi:10.23919/JSEE.2025.000035

Abstract

Abstract:

For air-to-air missiles, the terminal guidance’s precision is directly contingent upon the tracking capabilities of the roll-pitch seeker. This paper presents a combined non-singular fast terminal sliding mode control method, aimed at resolving the frame control problem of roll-pitch seeker tracking high maneuvering target. The sliding mode surface is structured around the principle of segmentation, which enables the control system’s rapid attainment of the zero point and ensure global fast convergence. The system’s state is more swiftly converged to the sliding mode surface through an improved adaptive fast dual power reaching law. Utilizing an extended state observer, the overall disturbance is both identified and compensated. The validation of the system’s stability and its convergence within a finite-time is grounded in Lyapunov’s stability criteria. The performance of the introduced control method is confirmed through roll-pitch seeker tracking control simulation. Data analysis reveals that newly proposed control technique significantly outperforms existing sliding mode control methods by rapidly converging the frame to the target angle, reduce the tracking error of the detector for the target, and bolster tracking precision of the roll-pitch seeker huring disturbed conditions.

Key words: air-to-air missile, roll-pitch seeker, finite-time convergence, combined sliding mode control, extended state observer

Bowen XIAO, Qunli XIA. Non-singular fast terminal sliding mode control for roll-pitch seeker based on extended state observers[J]. Journal of Systems Engineering and Electronics, 2025, 36(2): 537-551.

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