基于过载斜率灰色关联度的复合目标识别方法研究

Research on Compound Target Recognition Method Based on Gray Correlation Degree of Overload Slope

针对弹丸高速侵彻复合目标中引信难以识别高强度目标层,在复合目标后最佳毁伤位置起爆准确度低的问题,提出一种基于过载斜率灰色关联度的复合介质识别方法。首先,借鉴斜率灰色关联度方法的数学含义,对两条曲线的关联度改进设计为一条曲线相邻时间窗进行关联度分析,并根据相邻时间窗过载斜率灰色关联度的符号函数预测弹丸侵彻状态。当判断到弹丸在两个相邻时间窗中侵彻状态不同时,再结合过载斜率符号确定弹丸由弱强度目标进入高强度目标层。采用实测复合目标过载数据验证了该方法的有效性,结果表明,提出的方法可识别弹丸侵彻不同介质过载特征的变化趋势,准确确定弹丸是否由弱强度目标进入高强度硬目标,以此作为复合目标空穴起爆控制决策的关键技术支撑。

Aiming at the problems that the fuze is difficult to identify the high-intensity layer when the projectile penetrates the composite target at high speed and its detonation accuracy at the optimal damage position after the projectile penetrating the composite target is low, a composite medium identification method based on the gray correlation degree of overload slope is proposed.Firstly, the method uses the mathematical meaning of the slope grey correlation degree method for reference, the correlation degree of two curves is improved into the correlation degree analysis of adjacent time windows of one curve, and then the projectile penetration state is predicted according to the sign function of the overload slope grey correlation degree of adjacent time windows.When it is judged that the penetration state of the projectile is different in two adjacent time windows, the overload slope symbol is combined to determine whether the projectile enters the high-intensity target from the weak intensity target.The effectiveness of the proposed method is verified by the measured overload data of composite targets.The results show that the method can identify the change trend of overload characteristics of projectiles penetrating different media, whether projectiles enter high-strength hard targets from weak targets is determined accurately, and which is the key technical support for cavity initiation control decision of composite targets.