基于修正Landweber迭代的声学温度场重建算法

针对不同温度场分布模型，采用修正Landweber迭代技术对其进行温度场重建，介绍了基于声学方法的烟气测温基本原理以及基于Landweber迭代的声学温度场重建算法.根据实际情况，确定了重建算法中的价值函数和迭代步长，使得收敛速度有明显提高，得到了稳定的重建结果.给出了不同温度场分布模型及其重建图像和重建误差.仿真结果表明，即使在声波发射/接收器数目较少时(如8个)，该算法仍具有较高的重建精度和抗干扰能力，具有突出优点.

Acoustic temperature field reconstruction algorithm based on modified Landweber iterative method

For different temperature field models, the modified Landweber iterative method was applied to reconstruction of temperature field. The basic theory for measuring gas temperature based on the acoustic method and the acoustic temperature reconstruction algorithm based on the modified Landweber iterative method are introduced. The value function and iteration step were determined in the reconstruction algorithm. It is found that the converging speed significantly increases, and a stable reconstruction can be acquired. In addition, the different temperature field models as well as their reconstruction images and errors were given. Simulation results indicate that even though the number of acoustic wave sources and receivers is less, this algorithm also shows a high accuracy and anti-disturbance ability, and has remarkable advantages.