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Huang W.-P.,Group of Graduate Management | Xu Y.,Air force Radar Academy | Wang J.,Unit 95174 of PLA
Kongzhi yu Juece/Control and Decision

An algorithm of data fusion is presented based on mode recognition and regression analysis in terms of mixed fusion system. Firstly, the initial tracks of every sensor on its own are sent to the centre, and the original observation data is obtained. To get the fusion track, the association algorithm based on pattern similarity analysis is used. When the useful information of this short track is picked-up, a regression analysis is given to the original observation data which has a simple disposal. The fuse point estimate and interval estimates of the measured quantity can be obtained, and the object is tracked. Simulation results show the effectiveness and feasibility of the method. Source

Li Z.-H.,Group of Graduate Management | Tan X.-S.,AFEA | Wang H.,AFEA | Xiao S.,Group of Graduate Management
Guangdianzi Jiguang/Journal of Optoelectronics Laser

For the problem of beam position arrangement in a small search region for tracking and guiding radar of near space hypersonic targets, a new method for confirming the optimal model is proposed. Firstly, based on the analysis of different beam position arrangements' influence on the energy requirements and search performance of tracking and guiding radar, the optimal beam position arrangement patterns are given in this paper. According to the analysis of the beam width extension influence on beam position arrangement, the compensation method for beam width extension is also given. Then, based on the static optimal beam position arrangement model, a method for confirming the static optimal model with genetic algorithm (GA) is presented. At last, the dynamic matching of the beam position arrangement is studied by using the speed guidance information, and the update time of the dynamic matching is also given. Simulation results show that the proposed method makes the tracking and guiding radar capable of covering continuously with high probability for the targets in hypersonic movement, improves the detection performance of the tracking and guiding radar, and avoids the waste of search resources. Source

Xiao S.,Group of Graduate Management | Li Z.-H.,Group of Graduate Management | Tan X.-S.,AFEWA | Wang H.,AFEWA
Dandao Xuebao/Journal of Ballistics

The traditional tracking algorithms can not track near-space hypersonic-vehicle (NSHV) effectively. Aiming at this problem, one kind of variable-structure multiple-model tracking algorithm (DG-VSMM) based on the directed graph was proposed. The problem that the model set of traditional variable structure multiple-model algorithm (VSMM) can not quickly jump was analyzed, and the acceleration and angular velocity were selected as the model parameters, and the directed graph of model was built. According to the target maneuver situation, the model subset having a hand in the calculation was chosen, and the local model subset was adjusted for real-time based on the posterior probability of model to realize variable-structure multiple-model tracking. The Monte-Carlo simulation results show that this method can realize the quick jump among model subsets, and the tracking precision, stability and computation are improved, and it can be applied in near-space hypersonic-vehicle tracking. Source

Xiao S.,Group of Graduate Management | Tan X.,Air Force Early Warning Academic | Wang H.,Air Force Early Warning Academic | Li Z.,Group of Graduate Management
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition)

Aiming at that with the influence of irradiation posture abnormal distribution, high speed and high maneuvering target and atmospheric environment on radar cross section (RCS), it is prone to intermittent plot and lead to track initiation problem while radar detecting near space hypersonic target, a track initiation method based on parallel pipeline variable wave gate was proposed. The problems of traditional track initiation methods were analyzed, more targeted wave gates were designed combining with the maneuver characteristics of near space hypersonic target, and parallel was executed for different cycle track initiation process of intermittent point track using pipeline idea to achieve multi-objective discontinuous points on the track initiation. The Mont Carlo simulation results show that the method has higher probability of correct flight path starting, lower probability of false track initiation and a smaller amount of calculation, with some engineering practicality and generalizability. Source

Xiao S.,Group of Graduate Management | Li Z.-H.,Group of Graduate Management | Tan X.-S.,AFEWA | Wang H.,AFEWA | Li C.-X.,Group of Graduate Management
Yingyong Kexue Xuebao/Journal of Applied Sciences

The traditional algorithm of variable structure multiple model based on adaptive digraph (ADVSMM) cannot quickly jump between model sets, and requires large amount of computation. To deal with the problem, a variable structure multiple model algorithm based on connected graph (CG-VSMM) to the high speed high maneuvering targets is proposed. By analyzing the model sets conversion method of the traditional AD-VSMM, acceleration and angular velocity are selected as the model parameters to establish connectivity relationships between model sets connected graph. Models involved in the calculation are chosen depending on the target tactical situation. Partial models are adjusted according to the posterior probability of sub-model in real time. Monte Carlo simulation results show that the proposed method can achieve quick jump between models of VSMM algorithm. Tracking accuracy, computation complexity, and stability are improved. It can be used to track high speed high maneuvering targets. Source

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