Fixed-time Cooperative Guidance Law with Angle and Remaining Flight Time Constraints
Aiming at the problem of multi-vehicle cooperatively attacking the maneuvering target,a fixed-time convergence cooperative medium guidance law with terminal angle constraint and time consistency constraint is proposed.A line-of-sight(LOS)coordinate system is established in the two-dimensional scene,and the acceleration is decomposed into the direction along the LOS and the directions perpendicular to the LOS.First,based on the algebraic graph theory and the distributed cooperative protocol,the acceleration of the vehicle along the LOS direction is designed to ensure that the remaining flight time of multiple vehicles converge to the same within a fixed time.Second,based on the sliding mode control theory and the fixed time arrival algorithm,the acceleration in the normal direction of the LOS is constructed so that the terminal LOS angle converges to the desired 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 the remaining flight time and the terminal LOS angle within a fixed time.
VehicleCooperative guidanceTime consistencySliding mode controlFixed time convergence
万方数据
维普
