Distributed cooperative encirclement hunting guidance for multiple flight vehicles system

Abstract

Distributed cooperative encirclement hunting guidance strategy design and analysis issues for multiple flight vehicles system against a maneuvering target are considered in this paper. Distinct from the former results, the cooperative encirclement hunting guidance laws are based on the leader-follower coordination structure, and are divided into two parts. Firstly, for the leader flight vehicle, a full-head-on interception guidance law is proposed against the maneuvering target, where the uncertain dynamics and the target's unknown maneuver are estimated and compensated by using an extended state observer. For the follower flight vehicles, the distributed time-varying encirclement hunting line of sight angle formation tracking laws with overload saturation are designed where distributed extended state observers are introduced to approximate the complicated uncertain items and the leader vehicle's input signals. Then, the design processes of cooperative encirclement hunting guidance laws are summarized within five steps as an algorithm. Thirdly, the stability and the properties of the proposed cooperative encirclement hunting guidance algorithm are analyzed by employing Lyapunov theories. Finally, numerical simulation results illustrate the effectiveness of achieved cooperative encirclement hunting guidance strategies.