扩张Kalman滤波法在超声波CT反演计算中的应用

利用扩张Kalman滤波法求解超声波CT反演计算中的大型稀疏方程组．通过模拟计算说明了扩张Kalman滤波法在模拟模型介质中超声波传播速度强弱变化情况下的稳定性．并运用该法对混凝土试件中的缺陷进行了反演计算，其结果与试件中预设的缺陷部位基本相符．

Application of extending Kalman filtering theory in the inversion of Ultrasonic CT

The extending Kalman filtering theory is utilized to solve the big and sparse matrix in the inversion calculation of Ultrasonic CT. Based on different defect velocities in the simulated model, the stability of the extending Kalman filtering method is illustrated by the simulation calculation. The method is used to inverse the defects in the concrete specimens, and the location of the inversed defects agrees with that of the pre-placed.