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Cooperative Guidance Law for Target Pair to Lure Two Pursuers into Collision

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A novel cooperative defensive guidance law is presented for a two-on-two engagement. Instead of classical strategies in which evasive maneuvers are performed or additional agents (e.g., defender missiles) are deployed, the target pair lures the pursuing missiles into collision. The optimal cooperative strategy is solved using state-dependent Riccati equation method. Linearized kinematics and arbitrary-order linear adversaries’ dynamics are assumed in the guidance law derivation. Imperfect information is assumed on the relative states and the guidance laws employed by the missile pair. Guidance strategies that the pursuing missiles may employ are assumed to belong to a finite set of linear guidance laws. In addition to the proposed cooperative defensive strategy, a decentralized estimation scheme based on the multiple-model adaptive estimation approach is also presented. Guidance law and estimation performance are demonstrated using nonlinear simulations. Simulation results show the viability of the proposed guidance law and highlight the sensitivity of the guidance law to range measurement accuracy.
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... It should be noted that two-on-two scenarios with four adversaries have been studied recently. In Ref. [29], the authors investigated a two-on-two engagement with four adversaries but only two roles, a role of pursuer played by two missiles and the other role of evader played by two targets. In order to guarantee the survivability of the target, guidance laws to lure the two attacking missiles into collision with each other through cooperative maneuvers of the target pair were proposed. ...
... In order to guarantee the survivability of the target, guidance laws to lure the two attacking missiles into collision with each other through cooperative maneuvers of the target pair were proposed. Nevertheless, the guidance laws in Ref. [29] were developed by using a one-sided optimal method with the assumption that the missiles are using one of the finite set of linear guidance laws and the target pair is assumed to know this set before. Moreover, the missiles are assigned with no knowledge of being on a collision course with each other. ...
... Different from Ref. [29] concentrating on the survivability of targets, another interesting research topic is to reinforce the interceptor by flying coordinately with an additional protector, since interceptors in a three-adversary engagement are not able to guarantee the pursuit of target or the evasion of defender in condition that the target and the defender cooperate to lure it or it possesses lower maneuverability than the defender. Inspired by these facts, it is desirable to investigate the two-on-two engagement with four adversaries play four roles, an interceptor, a protector, a target and a defender, and develop guidance schemes by taking into account limited maneuverability and fuel cost. ...
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