基于多目标极值优化法的多光谱真温反演

Multispectral True Temperature Inversion Based on Multi-Objective Minimization Optimization Method

为了求解多波长高温计多光谱通道的欠定方程组,引入了优化的思想,将多光谱真温的求解问题转化为多目标极值优化(MMO)问题,无需假设光谱发射率与其他物理量之间的函数关系模型即可求解真温。所提方法的反演精度与二次测量(SMM)法的大体相同,但反演速度大幅增大。借助火箭尾焰的真实测量数据,利用MMO法实现了火箭尾焰真温和光谱发射率的反演。

In order to solve the underdetermined equation group of multiple spectral channels in a spectral pyrometer, the idea of optimization is introduced, and the problem of solving multispectral true temperature is transformed into a multi-objective minimization optimization(MMO) problem. The true temperature can be solved without assuming the function relationship model between spectral emissivity and other physical quantities. The inversion accuracy of the proposed method is equal to that of the second measurement method, and the inversion speed is greatly improved. With the aid of the actual measurement data of rocket exhaust plume, the MMO method is used to realize the inversion of the true temperature of the rocket exhaust plume.