Fixed-Time Anti-Saturation Tracking Control for Agile Missiles with Multiple Actuators

Jiaxun Li, Jianqiao Yu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This paper investigates the fixed-time tracking control problem for agile missiles with multiple heterogeneous actuators in the presence of saturation constraints and external disturbances. To reduce the turning radius and promote maneuvering envelope, a novel combination scheme for blended actuators is introduced in this paper, consisting of a flexible mechanism control system (FCS), reaction-jet control system (RCS), and aerodynamic control. Based on the proposed nonsingular terminal sliding mode surface, a fixed-time anti-saturation controller with an auxiliary system is presented first to ensure global fixed-time stability and to compensate for the adverse effects of input saturation. Subsequently, a fixed-time disturbance observer is constructed to estimate uncertainties and lumped disturbances, and to address the chattering problem. To assign the total virtual control command to different actuators, a control allocation based on dynamic programming considering actuator dynamics is established. Finally, detailed numerical simulations and comparisons are provided to verify the effectiveness and superiority of the proposed control scheme.

Original languageEnglish
Article number779
JournalAerospace
Volume11
Issue number9
DOIs
Publication statusPublished - Sept 2024

Keywords

  • agile missile
  • control allocation
  • fixed-time stability
  • flexible mechanism control system
  • input saturation

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