摘要
鱼雷制导系统有限的硬件条件及快速的攻击过程,要求应用于鱼雷制导计算的数学模型必须快速而准确。本文根据板块元方法精确预报了潜艇在不同频率、不同方位角下的目标强度值,先利用最小二乘法将单一频率下的方位角和目标强度进行曲线拟合,然后以频率为变量对曲线组进行拉格朗日插值,得到了一种以频率和水平方位角为变量,能够满足鱼雷制导系统实时计算使用的潜艇目标强度预报结果快速拟合模型。仿真结果表明,与现有的等效散射面积公式以及椭球修正模型等相比,本文提出的方法计算速度快,结果精度更高。
Mathematical model for torpedo guidance computation ought to be fast and accurate due to the limited hardware of guidance system and the fast attack process. Based on block element method, the target strengths of a submarine in dif- ferent frequencies and azimuths are forecast precisely in this paper. Firstly, the curves of azimuth angle and target strength in single frequency are fitted by using the least squares method. Then, Lagrangian interpolation is applied to the curves taking frequency as the variable to obtain a fast fitting model of submarine target strength forecast result with variables of frequency and horizontal azimuth, which can meet the real-time computation for torpedo guidance system. Simulation re- suits show that this method has higher computation speed and precision than existing equivalent scattering area formula and ellipsoid correction model.
出处
《鱼雷技术》
2013年第1期68-70,共3页
Torpedo Technology
基金
国家自然科学基金(50979093)
关键词
鱼雷
目标强度
快速拟合模型
拉格朗日插值
torpedo
target strength
fast fitting model
Lagrangian interpolation
