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Acta Armamentarii ›› 2024, Vol. 45 ›› Issue (11): 4155-4174.doi: 10.12382/bgxb.2024.0773

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Appointed-time Prescribed Performance Control for Missile Cold Launch Response Based on Nonlinear Filters and Dynamic Surface

YU Xiaochuan, YANG Xiaowei, LIANG Xianglong, ZHU Weilin, YAO Jianyong*()   

  1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
  • Received:2024-09-02 Online:2024-11-26
  • Contact: YAO Jianyong

Abstract:

Focusing on the unsupported random vertical launching process of a vehicular missile launching system, this paper proposes an idea of actively regulating the oscillation of launch canister and hence controlling the attitude of missile through the hydraulic actuator, which ensures the launching safety and the adaptability of vehicular missile launching system to the launching site. A 6-DOF dynamics model of the launching system is established, which takes into account the interactions among the launch canister, adapters and missile. The seventh-order state-space equation is derived by combining with the pressure dynamic equation of the hydraulic system. For avoiding the problem of “differential explosion” in a backstepping controller design of the seventh-order nonlinear system, the dynamic surface technique based on a smooth nonlinear filter is introduced to simplify the controller design. Meanwhile, in order to suppress the influence of hard-to-modelling factors on the launch dynamics, a time delay estimation control method is introduced for the estimation and attenuation of unmodeled errors and external disturbances. The fast convergence of missile tracking is achieved and the prescribed indicators of oscillation amplitude and angular velocity are met by using the appointed-time prescribed performance control method. The calculation results of mathematical model are compared with the results from the finite element model to verify the correctness of the proposed launch dynamics model. In addition, the launch dynamic response results under the influences of proportion-iIntegral-differential (PID) controller, dynamic surface controller, controller with dynamic surface and time delay estimation, and controller with the appointed-time prescribed performance are compared. The results show that the proposed controller can be used to constrain the angle of missile within 0.5° and the angular velocity within 1.5°/s when a missile comes out of the launch canister.

Key words: missile, launching system, unsupported vertical launch, appointed-time prescribed performance control, time delay estimation, dynamic surface control

CLC Number: