Research On The Cooperative Tracking And Guidance Methods Of Multiple Missiles Against Air Maneuvering Targets

In recent years,air defense in key locations has become the focus of research on air defense systems in countries around the world.This paper takes multiple missiles coordinated interception of air manoeuvring targets as the research background,and studies reasonable and efficient firepower resource allocation,fast and accurate tracking of targets,and stable and reliable coordinated interception technology,which are of great theoretical and practical significance to improve the country’s indigenous defence capability.Firstly,this paper establishes the coordinate systems involved in the process of terminal interception and their mutual conversion relationships,and gives a three-dimensional missile-target relative motion model,a sensor network model based on graph theory and filtering accuracy evaluation index.Then,the multi-target threat assessment and firepower resource allocation are studied.The corresponding weights are determined by threat indicator selection and the hierarchical analysis method;the target threat degree is calculated by normalising the decision matrix and using the grey correlation analysis method.Combining the target threat degree,relative distance and damage probability,a genetic algorithm-based multi-target fire resource allocation strategy is proposed to achieve the minimisation of fire resource consumption under the premise of satisfying the damage probability and nearby interception.Afterwards,the manoeuvre target tracking model and consistency estimation are investigated.To address the problem of model mismatch due to fixed parameters of the current statistical model in tracking manoeuvring targets,a multi-parameter optimised adaptive variable structure(CS-AGIMM)algorithm is proposed,which achieves the joint estimation of two important model parameters,maximum acceleration and manoeuvre frequency,by expanding the dimension of the model structure;discriminates the target manoeuvre by designing a distance threshold,and dynamically adjusts the model interval and transfer probability of the CS-AGIMM algorithm according to the manoeuvre size.In order to reduce both model and measurement errors,a DC-CS-AGIMM algorithm based on distributed consistency estimation is proposed to achieve consistent estimation of the target state with multiple missiles and multiple models.Finally,the three-dimensional manoeuvring target cooperative interception guidance law is investigated,and a robust three-dimensional cooperative guidance scheme is proposed to address the problem of interceptor missiles failure affecting the cooperative interception mission.By using an incremental proportional guidance law in the pitch channel to make the interceptor missiles trajectory fall quickly into the yaw plane,and designing a distributed cooperative guidance law with consistent arrival time in the yaw channel,combined with a local filtering algorithm,the identification and elimination of interceptor faults are achieved,ensuring that normal interceptor missiles hit the target at the same time.