| 基于改进DBO算法的红外发射率求解 |
| 投稿时间：2024-12-17 修订日期：2024-12-26 点此下载全文 |
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| 基金项目:电磁信息控制与效应全国重点实验室开放(20230201)资助。 |
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| 中文摘要:发射率可以表征目标红外隐身能力,针对应用反射法的发射率求解问题,提出一种基于双向反射分布函数(BRDF)的发射率间接求解方法。设计出反射亮度测量系统,利用MR170型傅里叶红外辐射计测量出多个角度下的目标反射亮度数据,应用GRU网络对3~5μm和8~14μm波段的辐射亮度数据进行回归排除大气吸收干扰。为准确反演出BRDF模型参数,在蜣螂优化(Dung Beetle Optimizer, DBO)算法的基础上,通过加入混沌映射初始化、柯西变异和可变螺旋搜索策略三种改进方法,对蜣螂优化算法进行改进,计算得到不同角度下的BRDF值后,应用新算法反演五参数函数模型的参数值,进而获得整个空间范围内的红外辐射分布。提出的改进算法收敛速度具有较大提升,且更容易跳出局部最优,最终求解发射率为0.4236,与理论测试样品间的相对误差为11.75%,为间接求解发射率问题提供一种方法借鉴。 |
| 中文关键词:双向反射分布函数 DBO优化算法 红外发射率 红外辐射亮度 |
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| Infrared emissivity solution based on improved DBO algorithm |
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| Abstract:The emissivity can characterise the target infrared stealth capability, and for the problem of emissivity solving by applying the reflection method, an indirect emissivity solving method based on bidirectional reflection distribution function (BRDF) is proposed. A reflectance brightness measurement system is designed to measure the target reflectance brightness data at multiple angles using MR170 Fourier infrared radiometer, and the atmospheric absorption interference is eliminated by applying the GRU network to regress the radiance brightness data in the 3~5μm and 8~14μm bands. In order to accurately invert the parameters of the BRDF model, based on the Dung Beetle Optimizer (DBO) algorithm, the dung beetle optimization algorithm is improved by adding three imp rovement methods, namely, chaotic mapping initialization, Cauchy"s variant, and variable helix searching strategy, and then the new algorithm is applied to invert the five-parameter function model after obtaining the values of the BRDF at different angles. parameter values, and then obtain the infrared radiation distribution in the whole spatial range. The convergence speed of the proposed improved algorithm is greatly improved, and it is easier to jump out of the local optimum, and the final solved emissivity is 0.4236, and the relative error with the theoretical test samples is 11.75%, which provides a method for indirectly solving the problem of emissivity. |
| keywords:Bidirectional reflectance distribution function DBO Optimization Algorithm infrared emissivity brightness of infrared radiation |
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