区域能量聚焦技术中超稀疏阵列优化算法

doi:10.19665/j.issn1001-2400.2021.04.008

Abstract

Abstract:

The setting of ultra-sparse arrays is one of key factors for the performance of regional energy focusing.This paper focuses on one of its typical applications:Precision Electronic Warfare by UAV,and proposes an optimization algorithm for ultra-sparse arrays to maximize the performance of regional energy focusing.First,we establish the joint optimization model of the interference waveform and the positions of elements.Second,particle swarm optimization (PSO) is adopted to iterate the positions of elements.Then,the target value of the subproblem is solved for the fitness criterion,as the current array is known in each step of the iteration.Finally,we get the optimal solution of the interference waveform and the ultra-sparse array by this method.Numerical results indicate that the algorithm can optimize the array effectively,and improve the indicators of regional energy focusing obviously.Whether the localization errors of elements exist or not,the algorithm provides a better performance than existing algorithms which only design the interference waveform.

Key words: regional energy focusing, ultra-sparse arrays, particle swarm optimization, optimization algorithm

CLC Number:

TN972

YANG Zhongping,ZHOU Qingsong,ZHANG Jianyun. Optimization algorithm for ultra-sparse arrays in regional energy focusing[J].Journal of Xidian University, 2021, 48(4): 57-63.

Figures/Tables 4

阵列	时间	精确干扰性能指标
阵列	时间	O_FED	E_T	E_P	$E av e T$	$E av e P$	ηT/%	ηP/%	d_min/m	d_ave/m
阵列Ⅰ	优化前	4 280.3	8.397 1	2.480 2	13.910 0	0.554 3	72.15	24.40	7.892 3	28.821 7
	优化后	5 384.9	14.837 1	0.580 7	17.166 8	0.191 2	100.00	0.00	3.399 8	15.589 9
阵列Ⅱ	优化前	4 068.2	7.748 8	2.619 0	13.325 8	0.686 6	62.26	27.88	9.281 3	31.088 2
	优化后	5 065.8	11.504 1	0.591 3	16.101 8	0.107 6	98.34	0.00	5.545 3	20.463 9
阵列Ⅲ	优化前	4 380.6	10.241 7	4.534 1	14.834 0	1.475 7	90.27	55.41	5.234 8	25.358 0
	优化后	5 460.5	15.942 4	0.933 0	17.400 1	0.182 5	100.00	0.36	3.182 1	14.442 9

References 16

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半径r/m	实验Ⅰ		实验Ⅱ		实验Ⅲ
半径r/m	优化前	优化后	优化前	优化后	优化前	优化后
0.01	4 254.03	5 356.40	4 259.07	5 328.64	4 270.39	5 314.71
	↓0.61%	↓0.52%	↓0.49%	↓1.05%	↓0.23%	↓1.30%
0.05	3 787.09	4 640.55	3 578.64	4 471.20	3 954.15	4 164.83
	↓11.52%	↓13.82%	↓16.39%	↓16.97%	↓7.62%	↓22.66%
0.10	2 137.31	2 561.73	2 536.59	3 010.53	2 689.22	3 794.63
	↓50.07%	↓52.42%	↓40.74%	↓44.09%	↓37.17%	↓29.53%

Optimization algorithm for ultra-sparse arrays in regional energy focusing

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