基于改进哈里斯鹰优化的相控阵雷达光束指向控制方法

摘要:

在高动态目标场景下,相控阵雷达光束指向控制存在多个局部最优解,易陷入局部最优解,且控制中涉及到多个因素,难以精确协调各因素,导致光束指向控制精度不高,光束指向出现较高的抖动。为此,提出基于改进HHO算法的相控阵雷达光束指向控制方法。模拟相控阵雷达光束发射与传播过程,求解相控阵雷达光束指向控制目标。以捕获相控阵雷达光束为哈里斯鹰初始种群,通过探索和开发两个阶段,执行软包围、硬包围、俯冲软包围、俯冲硬包围等操作,迭代更新的种群位置作为相控阵雷达光束指向的检测结果,同时避免指向检测陷入局部最优,从而找到更接近全局最优的光束指向控制解。通过光束指向检测值与设定目标之间的比对,计算光束指向控制量。在设定条件约束下,通过雷达光束相位调整、偏转控制、旁瓣抑制等操作,以实时、精确地调整各因素,实现相控阵雷达光束指向控制。通过性能测试实验得出结论:优化设计方法的光束指向检测偏差能够控制为±0.5°之间,与两种传统控制方法相比,在优化设计方法控制下,光束指向位置控制偏差更小、旁瓣抑制率明显提升,光束生成的光斑抖动程度更低,即优化设计方法的控制性能更优。

Abstract:

In high dynamic target scenarios, phased array radar beam pointing control has multiple local optimal solutions, which can easily get stuck in local optimal solutions. Moreover, the control involves multiple factors, making it difficult to accurately coordinate them, resulting in low accuracy of beam pointing control and high jitter in beam pointing. Therefore, a phased array radar beam pointing control method based on improved HHO algorithm is proposed. Simulate the emission and propagation process of phased array radar beams, and solve the problem of phased array radar beam pointing towards the control target. Using the capture of phased array radar beams as the initial population of Harris hawks, through two stages of exploration and development, soft encirclement, hard encirclement, diving soft encirclement, diving hard encirclement and other operations are performed. The iteratively updated population positions are used as the detection results of phased array radar beam pointing, while avoiding the detection of pointing getting trapped in local optima, thus finding a beam pointing control solution that is closer to the global optimum. Calculate the beam pointing control quantity by comparing the beam pointing detection value with the set target. Under the constraints of set conditions, phased array radar beam pointing control is achieved by real-time and accurate adjustment of various factors through operations such as radar beam phase adjustment, deflection control, and sidelobe suppression. The conclusion drawn from performance testing experiments is that the beam pointing detection deviation of the optimized design method can be controlled within ± 0.5 °. Compared with the two traditional control methods, under the control of the optimized design method, the beam pointing position control deviation is smaller, the sidelobe suppression rate is significantly improved, and the degree of beam spot jitter generated is lower, indicating that the control performance of the optimized design method is better.