基于分布宽度选取收敛阈值求解粒子尺度分布

Study of Invert Particle Size Distribution by Choosing Convergence Threshold Based on Distribution Width

在激光粒度测量中,采用改进的共轭梯度法(ICGA)能够求解单峰或多峰的粒度分布,但是为了对宽度不同的粒度分布均获得较好的效果,仍需要选取不同的迭代参数值。针对以上问题,提出通过改变收敛阈值来控制迭代过程,使该算法可满足窄、宽和多峰分布的粒度求解要求。模拟计算和实测结果表明,这种方法可以提高准确度和分辨率,增强抗噪声能力。

In order to select adequate iteration parameter values to solve particle size distribution with different width, it is proposed to control the iteration process by altering the convergence threshold. Accordingly, the improved conjugate gradient algorithm（ICGA） can be used to invert narrowly distributed,widely distributed and multi-modal PSD in practice. Simulated and experimental results show that the proposed method can improve the accuracy and resolution as well as the capability of noise resistance.