To study the effect of burst height on the performance of metal jet penetration into the moving target, finite element models of metal jet penetration into the moving target with different speeds at different burst heights are established using finite element simulation software, and numerical simulation is performed. The results show that with the increase of burst height, the metal jet is elongated, the velocity of the head and neck of the jet decreases and the diameter shrinks; when the target panel is stationary, the penetration depth of the metal jet into the target panel increases continuously with the increase of burst height; when the target panel is moving, the burst height for the maximum penetration depth of the metal jet corresponding to each moving speed of the target panel is not consistent with the burst height for the static maximum penetration depth, and with the increase of the moving speed of the target panel, the burst height for the maximum penetration depth of the metal jet decreases continuously; smaller burst height ensures the speed and diameter of the head and neck of the metal jet, enhances the stability of the metal jet penetration into the moving target and the resistance to interference, and improves the penetration performance of the metal jet into the moving target.
To solve the problem of intercepting target with missiles for forward tracking, this paper proposes a novel forward tracking guidance algorithm based on adaptive fast dynamic surface sliding mode control method for interceptor missiles. Firstly, the guidance system model of forward tracking intercept is established based on the relative motion relation of missile-target and forward tracking interception principle. Secondly, in order to deal with the uncertain interference in the system and improve the guidance accuracy, the variable gain extended state observer (TVGESO) is used to estimate the interference in the model, on this basis, the forward interception guidance law is designed based on interference estimation and adaptive fast dynamic surface sliding mode control method. Finally, the simulation results verify that the proposed forward tracking guidance law based on the adaptive fast dynamic surface sliding mode can intercept the target in front of the target and has better guidance accuracy.
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