基于背景插值的空空导弹攻击区在线模拟方法

针对空战态势迅速变化对空空导弹攻击区模拟实时性的需求,提出基于背景插值的攻击区在线模拟方法。首先预测下一采样时刻态势,并针对预测态势模拟解算攻击区信息;当下一采样时刻到来时,利用攻击区预测值和先前两次攻击区模拟信息及相应的态势记录插值估计攻击区真实值。背景插值方法将攻击区模拟解算放到先前计算周期中,实时性高。理论分析证明了背景插值误差随着采样时间的减小收敛于零。仿真结果表明,背景插值模拟方法的误差与传统攻击区模拟方法相当,而前者平均可在7.16×10^-6s内给出结果,后者平均计算耗时为0.290 s。

Background interpolation for on-line simulation of capture zone of air-to-air missiles

Capture zone simulation requires several time consuming trajectory integrations. However, the change of situation is very fast and demands the information of capture zone in real time. In order to compute the information of capture zone in real time, this paper suggests a background interpolation strategy for capture zone on line simulation. Firstly, the value of the state variables at the next sample time is predicted according to the state equations. And the capture zone at the predicted state is simulated. Secondly, when the next sample time arrives, the predicted values of capture zone in the current cycle and the previous two cycles, as well as the corresponding state values, are used to interpolate the true capture zone value in current cycle. In this manner, the time consuming processes of trajectory integration is removed into the background. Thus, the interpolation is the only operation that delays the capture zone information. The theoritical analysis proves that the error of interpolation converges to zero as the sample interval decreases. Simulation results show that the errors of the background interpolation method and the traditional capture zone simulation are almost the same, and the average time delays are 7.16×10^-6 and 0.290 second, respectively.