Fixedd-time convergence spacecraft cooperative guidance law for maneuvering target
LI He-yu
WANG Jian-bin
ZHANG Rui
SONG Feng
Abstract：Aiming at the problem of cooperative capture of maneuvering target by multiple spacecraft in three di-mensions(3D),a fixed-time convergence cooperative guidance law with terminal angle constraint and time consistency constraint is proposed.The 3D line-of-sight(LOS)coordinate system between spacecraft and target is established,and the acceleration is decomposed into three directions including the direction along the LOS and the directions perpendicular to the LOS.The acceleration along the LOS is designed by algebraic graph theory and distributed cooperative protocol algorithm to realize the time consistency constraint of multiple spacecraft.The accelerations perpendicular to the LOS are designed by sliding mode control theory and fixed-time convergence theory,so that the LOS angles converge to the expected value within a fixed time.In addition,the unknown target acceleration is estimated by a fixed-time observer and compensated in the guidance command.The simulation results show that the proposed cooperative guidance method can achieve the convergence of time-to-go and the terminal LOS angle within a fixed time.
Keywords：aerospace controlcooperative guidancetime consistencysliding mode controlfixed-time convergence
Publication Date：2026-02-28
Online Publishing Date：2026-04-08(First online date of this platform, not the publication date of the document)
Pages：9( 368-376 )