This paper investigates a cooperative strategy for protecting an aerial target.The problem is solved as a game among four players（a target,two defenders,and a missile）.In this scenario,the target launches two defend...This paper investigates a cooperative strategy for protecting an aerial target.The problem is solved as a game among four players（a target,two defenders,and a missile）.In this scenario,the target launches two defenders（defender-1 and defender-2）simultaneously,to establish a oneway cooperation system（OCS）against an attacking missile.A new optimal evasion strategy for the target is also derived.During the engagement,the target takes into account the reaction of the attacking missile,and guides defender-1 to the interception point by receiving information from defender-1.Depending on the control effort of the target,defender-2 can choose appropriate launch conditions and use very limited maneuvering capability to intercept the missile.For adversaries with first-order dynamics,simulation results show that the OCS allows two defenders to intercept the missile.During the engagement,even if one defender or communication channel is broken,the OCS still allows an interception to be made,thus increasing the target’s survivability.展开更多
This work concerns defense guidance problems for 3-player target–defender–attacker engagement scenarios,in which the defender is launched to capture the incoming attacker in advance of the target being hit;a line-of...This work concerns defense guidance problems for 3-player target–defender–attacker engagement scenarios,in which the defender is launched to capture the incoming attacker in advance of the target being hit;a line-of-sight(LOS)triangle-based prescribed-time guidance is derived as an interception strategy for the defender.Integrating both the attacker–target and defender–attacker perspectives into the relative engagement model,the 3-player nonlinear engagement model is deduced considering the second-order lag dynamics of the actuator.Next,to reduce the defender and attacker overload ratio,the LOS triangle-guidance concept is presented to keep the defender on the LOS frame between the attacker and the target,in which the lateral overloads of the defender and attacker cancel each other out.In addition,in order to achieve perfect capture of the attacker in advance,the prescribed-time control can preallocate convergence time such that the defender can be guided and kept at the LOS frame between the attacker and the target in the preset time.What is even more unique is that the proposed guidance law design ignores the maneuvering of the attacker;i.e.,the overload of the attacker is unknown,which is treated as a disturbance and estimated by the improved adaptive law.Numerical simulations are executed to validate performance and superiority,which has potential application value.展开更多
基金co-supported by the National Natural Science Foundation of China (No. 11672093)the Shanghai Aerospace Science and Technology Innovation Foundation (No. SAST2016039)
文摘This paper investigates a cooperative strategy for protecting an aerial target.The problem is solved as a game among four players（a target,two defenders,and a missile）.In this scenario,the target launches two defenders（defender-1 and defender-2）simultaneously,to establish a oneway cooperation system（OCS）against an attacking missile.A new optimal evasion strategy for the target is also derived.During the engagement,the target takes into account the reaction of the attacking missile,and guides defender-1 to the interception point by receiving information from defender-1.Depending on the control effort of the target,defender-2 can choose appropriate launch conditions and use very limited maneuvering capability to intercept the missile.For adversaries with first-order dynamics,simulation results show that the OCS allows two defenders to intercept the missile.During the engagement,even if one defender or communication channel is broken,the OCS still allows an interception to be made,thus increasing the target’s survivability.
基金cosupported by the National Natural Science Foundation of China(Nos.12072090,12322202,12172013,12302056).
文摘This work concerns defense guidance problems for 3-player target–defender–attacker engagement scenarios,in which the defender is launched to capture the incoming attacker in advance of the target being hit;a line-of-sight(LOS)triangle-based prescribed-time guidance is derived as an interception strategy for the defender.Integrating both the attacker–target and defender–attacker perspectives into the relative engagement model,the 3-player nonlinear engagement model is deduced considering the second-order lag dynamics of the actuator.Next,to reduce the defender and attacker overload ratio,the LOS triangle-guidance concept is presented to keep the defender on the LOS frame between the attacker and the target,in which the lateral overloads of the defender and attacker cancel each other out.In addition,in order to achieve perfect capture of the attacker in advance,the prescribed-time control can preallocate convergence time such that the defender can be guided and kept at the LOS frame between the attacker and the target in the preset time.What is even more unique is that the proposed guidance law design ignores the maneuvering of the attacker;i.e.,the overload of the attacker is unknown,which is treated as a disturbance and estimated by the improved adaptive law.Numerical simulations are executed to validate performance and superiority,which has potential application value.
