Research On Configuration Design And Data Processing Method Of Aircraft Cooperative Detection

In the space battlefield,it is difficult for a single aircraft to achieve effective locating detection and precision attack on the complex battlefield,still,the cooperative detection of aircraft can effectively solve this deficiency.In collaborative detection and attack on ground targets,positioning accuracy is the main factor to be considered.In the cooperative detection,the appropriate launch configuration should be established first,then information transmission between aircraft should be carried out during flight,and further data processing should be carried out.At the same time,to achieve accurate detection and strike of aircraft in the flight process,it is necessary to better control the flight attitude of aircraft.Because of the above contents,this paper will research aircraft configuration design,aircraft data transmission and processing technology,the integrated design of collaborative detection and guidance,etc.The specific contents are as follows:1.Since most of the current aircraft configuration design aims to solve problems such as resource allocation,detection capability and performance evaluation,the influence of geometric configuration relationship on collaborative detection accuracy is ignored.In this paper,Geometric Dilution of Precision(GDOP)is introduced to indicate the accuracy.The relationship between the particular geometry configuration of the aircraft and the positioning accuracy is analyzed by changing the space and geometric position of the aircraft.To verify the accuracy of the conclusion about the influence of particular configuration on the accuracy,and to plan the configuration design method of each aircraft under the restricted launch area,Grasshopper Optimization Algorithm(GOA)was selected to construct the GOA-GDOP configuration design method.Also,the optimal launch position of each aircraft is searched by traversing as an optimization index,which solves the configuration design problem under the restricted conditions of flight launch area and achieves the highest collaborative detection accuracy.The simulation results show that the architecture design optimization algorithm based on the proposed algorithm can not only meet the highest precision of cooperative detection,but also consume less computing resources to achieve rapid planning.2.In terms of data processing,to select the positioning and data fusion algorithm suitable for multi-aircraft detection of ground targets,this paper constructs the positioning target state equation and aircraft’s observation equations.Firstly,the single aircraft positioning method is studied through target positioning initialization and Unscented Kalman Filtering(UKF)algorithms,and its positioning accuracy is analyzed.Secondly,the collocation algorithms of homogeneous sensors(radar to radar or infrared to infrared)and heterogeneous sensors(radar to infrared)are studied by centralized and distributed information fusion algorithms,the influences of different fusion algorithms on positioning accuracy are compared.The simulation results show that,firstly,the positioning accuracy of collaborative detection is higher than that of single aircraft;secondly,when the observation pitch Angle and azimuth error are the same,the positioning accuracy of radar and infrared combination is higher than that of infrared combination.Third,the centralized fusion algorithm has the highest accuracy.In contrast,the federated filter algorithm has more robust realtime performance and fault tolerance,both of which have their advantages in the data processing of collaborative detection.3.The traditional guidance control design process is usually the target position tracking and guidance algorithm for decoupling design,but need real-time guidance algorithm as input parameters,such as the estimated target position,and at the same time can also affect target tracking guidance algorithm establishment of state and measurement equations and observation conditions,both the existence of high coupling,The decoupled design will cause some information loss and reduce the estimation and guidance accuracy.To solve this problem,an integrated design method of collaborative detection and guidance based on Unscented Transformation(UT)is proposed in this paper.On the one hand,the cooperative detection target positioning algorithm is introduced into the guidance law,and the mean and variance of the fused target position estimation are used as the input of the guidance algorithm.At the same time,the guidance process is regarded as a nonlinear propagation process of a random vector,and the mean and variance of flight control Angle are obtained by untraced transformation.To validate the proposed integration of collaborative detection and guidance the effectiveness of the proposed design method,the simulation compared the target known cases of guidance,a single radar guidance method,and the integrated design method proposed in this paper;the simulation shows that the process presented in this paper to calculate the angle of aircraft control and overload compared to target known cases,It also provides a theoretical basis for aircraft guidance design in practical application.At the same time,it is verified that compared with single aircraft detection,cooperative detection can not only improve the detection accuracy,but also meet the lower overload,and can better control the velocity direction and control the angle of the aircraft.To show the operability of cooperative detection technology more directly,the autonomous collaborative detection simulation system of aircraft is built by using the Simulink simulation system module.It is composed of two parts.One is the aircraft dynamics and guidance module.Ten aircraft models are designed,and the aircraft dynamics module is built to simulate flight attitude,and the target position estimation data is read to guide and control the aircraft.The second part is collaborative detection data processing,which mainly uses centralized fusion and UKF filtering to carry out information fusion processing on the input data of 10 aircraft,and then feedbacks the estimated value to each aircraft.This paper designs the aircraft configuration of aircraft,select the appropriate data processing algorithm,uses the detection data of aircraft guidance law for the integration of innovation.This method achieves the overall goal of improving the positioning accuracy.The aircraft can not only satisfy the accuracy requirements,but also meet the constraints such as angle of fall,speed of fall,and overload when detecting and attacking ground targets.The Simulink simulation system proves that the method presented in this paper has specific operability both in theory and in practical application.