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Acta Armamentarii ›› 2025, Vol. 46 ›› Issue (7): 240437-.doi: 10.12382/bgxb.2024.0437

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Three-dimensional Fixed-time Attack Proportional Guidance Law Based on Variable Power Sliding Mode for Multiple Missiles

LI Jian1, LIU Peng1,*(), YU Xiaohao1, YU Hang1, LI Changsheng1, SHI Yunlei2, ZHANG He1   

  1. 1 School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
    2 The Fifth Electronics Research Institute of MIIT, Guangzhou 510000, Guangdong, China
  • Received:2024-06-05 Online:2025-08-12
  • Contact: LIU Peng

Abstract:

Aiming at the problem of simultaneous attack of multiple missiles against the important targets,a three-dimensional fixed-time attack proportional guidance law based on variable power sliding mode is proposed for multiple missiles.A missile-target dynamics model in three-dimensional space is established.To reduce the complexity of designing a control method in three-dimensional space,a reference plane is determined in three-dimensional space,and the missile-target state vector in three-dimensional space is decomposed into two components parallel and perpendicular to the reference plane.Control methods are designed separately in the reference plane.The method parallel to the reference plane is based on the proportional guidance method,The tangential and normal accelerations are designed as the control inputs to drive the missile to reach the remaining flight time consistency before the desired attack moment.Additionally,for the component perpendicular to the reference plane,a guidance law is designed using an improved sliding mode control method based on variable power to achieve the rapid convergence in the early stage and the stable control in the terminal stage for the multi-missile system.When the consistent control of both components along the reference plane is realized in a preset attack time,the multi-missile system can complete the synchronized attack in the three-dimensional space.Furthermore,the synchronized attack on the target by the multi-missile system in the asynchronous launching scenario can be realized by compensating the launch delay of each missile in the guidance law.The performance of the proposed three-dimensional guidance law is verified by simulation,which is characterized by fast convergence and high stability.The guidance law is not only applicable to synchronous launching scenarios,but also adds only the launch delay of each missile to the input to complete the consistency control of attack time.

Key words: missile, variable power sliding mode control, proportional guidance law, fixed-time attack, three-dimensional attack scenarios

CLC Number: