Three-Dimensional Fixed-Time Cooperative Guidance Law With Impact Angle Constraint and Prespecified Impact Time

In this paper, by utilizing fixed-time control technique and a leader-follower scheme, three-dimensional (3-D) cooperative guidance law is developed to tackle impact angle constrained simultaneous arrival problem. Firstly, in the line-of-sight (LOS) direction, command for leader put forward make time error converge zero fixed such that capable of reaching target at prespecified time. Then, each follower designed based on information from adjacent interceptors guarantee follower's achieves consensus with leader. Secondly, azimuth direction elevation LOS, commands are nullify LOS angular rates within able reach desired angles. Meanwhile, law's convergence rigorously proved Lyapunov stability theory. Finally, simulations given illustrate effectiveness theoretical results.