一种不依赖超参数的稀疏信号单快拍DOA估计方法

基于传感器阵列输出模型的稀疏重构, 研究了利用单快拍数据进行相干信号波达方向(direction-of-arrival, DOA)估计的问题。定义一个干扰协方差矩阵作为权矩阵, 通过加权最小二乘(weighted least squares, WLS)准则的迭代自适应求解, 实现单快拍DOA高精度估计算法, 简称WLS-IAE算法。详细分析了算法的计算复杂度, 并与经典的稀疏估计类算法进行比较。结果表明作为一种稀疏表示类估计方法, WLS-IAE算法不仅保持了在低信噪比、单快拍、信号相干、信号DOA角度间隔小等非理想条件下的良好估计性能, 而且无需选取超参数, 计算复杂度更低, 具有更强的实时性, 适用于快变目标信号DOA的实时跟踪测量, 具备潜在的工程实用价值。仿真实验验证了提出算法的有效性。     

坦克炮控系统关联参数测试精度建模仿真分析

叙述了坦克武器系统的发展历程及其炮控系统定型试验项目,介绍了炮控系统性能参数测试系统的组成及工作原理,提出了坦克装甲车辆武器系统定型试验中,炮控系统关联参数测试时存在测试精度超差问题,通过建模仿真手段,建立了基于光纤陀螺的角位移测量误差模型,分析了影响测量精度的主要因素,给出了测量误差补偿方法,经试验验证,补偿方法合理可行。

Abstract：

Progress history and gun control system （GCS） approval test items of tank weapon systems were proposed. Composition and working principle of GCS performance parameter test system were introduced. The problem of GCS relevant parameters measuring accuracy running out of tolerance in tank armored vehicle weapon system approval test was put forward. Angle measuring error model based on FOG was modeled and the major influencing factors of measurement accuracy were analyzed by the means of modeling and simulation. Compensation process of measuring error, which was verified by experiment to be rational and feasible, was given out.