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Fire-control radar network uses data fusion to form more accurate estimate of a target track, the prerequisite of normal data fusion is the system bias registration. In fire-control radar network, due to the existence of the approximating bias of coordinate conversion model and time synchronization bias, data fusion process brings the immitted system biases besides inherent system biases. This paper...
Principal component analysis (PCA) combining with multivariate statistical knowledge is used for the sensor fault detection and diagnosis according to the characteristics of the satellite attitude control system. In this paper, the principle of PCA to detect faults is presented, and the conventional PCA fault isolation approach is improved. The example of using PCA to fault detection and diagnosis...
The paper proposes a solution to digitize the angle information of the two speed resolvers based on tangent algorithm. This solution is simple than the tracking types in common use. The principle is analysed and the configuration of software and hardware is presented. To avoid overflow and improve precision, sampling at the signal peak and two tables are adopted. The experiments show that the solution...
In ISAR imaging the rotation of the mobile target is not uniform after motion compensation, but variable in time, so the traditional range-Doppler imaging methods can not get clear images. This paper analyzes and compares several time-frequency methods to image the mobile target, and proposes a new imaging method based on the parametric time-frequency signal analysis-the ST-AGCD algorithm. This method...
In this paper, the idea of manifold learning is introduced into inverse synthetic aperture radar (ISAR) target recognition, a new method based on Locality Preserving Projections (LPP) algorithm and k-nearest neighbour classification for ISAR target recognition is proposed. Firstly, the LPP algorithm is used to reduce the dimension of ISAR image, and then three kinds of aircraft target are classified...
The selection of weighting matrix in design of the linear quadratic optimal controller is an important topic in the control theory. In this paper, an approach based on genetic algorithm is presented for selecting the weighting matrix for the optimal controller. Genetic algorithm is adaptive heuristic search algorithm premised on the evolutionary ideas of natural selection and genetic. In this algorithm,...
When multiple moving targets are close in the same radar beam and can not be separated in range, the conventional ISAR imaging motion compensation algorithms can not get clear images. However, these targets have different velocities and directions, so their Doppler histories of returned signals are different. In a short time, these Doppler histories can be treated as approximately linearly changing...
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