Research On Cooperative Guidance Method Based On Motion Estimation Of Large Maneuvering Target

In modern combat systems,maneuvering has become one of the means for high-value targets to evade the interception and strike systems.Due to the existence of target maneuvering,in order to effectively hit the target,the motion information of the target(such as the range between missile and target,the elevation angle of the target’s trajectory,and the maneuver acceleration,etc.)can be estimated firstly,and then a coordinated guidance law incorporating the target information can be designed.However,a tactical missile with SRM using infrared guidance system can only measure the line-of-sight angle between the missile and target and obtain the target’s position information.So that it cannot accurately estimate the target’s motion information.At the same time,current tactical missiles using SRM mostly have uncontrollable velocity since they can only change the direction of velocity but not the magnitude of velocity.Therefore,how to slightly modify and design the guidance system of existing tactical missiles using SRM to achieve coordinated guidance under multiple constraints is an urgent problem to be solved.Aiming at these two problems,this paper first designs a multi-missile coordinated estimation algorithm based on the basic principle of the interactive multiple model Kalman filter algorithm.The algorithm integrates three target maneuver models to complete the cooperative filter design of multiple missiles with only target position information,and then estimate the target’s motion information.Simulation results show that the designed multi-missile coordinated estimation algorithm can effectively estimate the target’s motion state.Secondly,based on the previously obtained target motion information,a novel coordinated guidance method is proposed using the leader-follower structure.This new type of coordinated guidance law integrates the target’s motion information,which can achieve the tactical objective of hitting a moving target simultaneously by infrared guided tactical missiles under the impact angle constraint.Based on the theory of augmented proportional guidance,this guidance law realizes time coordination under impact angle constraint by separately designing angle constraint bias term and time constraint bias term.Through multiple simulations under different conditions,it is obvious that this guidance law has certain reference value.Finally,through the research results of this paper,a alternative method for the use of current tactical missiles using SRM in multi-missile coordinated fights on the battlefield of future is provided.At the same time,based on the research content of this paper,some problems which are needed to be solved in after work are proposed.