Fault diagnostic method of floatation process based on statistic distribution of foam size

Abstract

A fault diagnostic method of floatation process based on the statistic distribution of foam size comprises the following steps of: accurately describing the statistic characteristics of the foam size by using probability density function (PDF) after the watershed segmentation is conducted on the obtained foam image, and designing estimation operators suitable for the foam size distribution to approach the probability density distribution, thus converting the foam size PDF into dynamic weight coefficient of non-parametric estimation, further establishing a nonlinear weight dynamic model with time delay, and obtaining feasible optimal fault detection method and diagnostic method based on the linear matrix inequality. The fault diagnostic method of floatation process based on statistic distribution of foam size can be used for the detection and diagnosis of drug fault during the continuous production process of the floatation, output the probability density by tracking, analyze and estimate the weight coefficient of curve, design a filter to detect faults, and accurately track the faults, thus assisting the operators to find the faults, stabilize the production process and achieve the optimization of the floatation process.

Description

[technical field] [0001] The present invention relates to the field of ore dressing, image processing technology, probability statistics and other fields, specifically to the characterization method of the statistical distribution of the size of the flotation foam image, the density estimation method, the model analysis of the nonlinear stochastic dynamic system with time delay, and the detection of the failure of the amount of medicament added. Detection and diagnosis. [Background technique] [0002] The flotation process is a widely used mineral processing method in mineral processing. It involves extremely complex physical and chemical processes. With the rapid development of computer application technology, image processing technology and intelligent control and other technologies, a flotation foam image visual monitoring system has been developed, which can monitor the flotation process online and in real time, and solve the flotation production process caused by subjec...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of accurate description of the statistical distribution of flotation foam size and the fault diagnosis of reagent addition in the flotation process, and provides a method for fully characterizing the structural characteristics of the foam, and the designed non-parametric estimation operator approximates the probability of the size distribution Density curve, the foam size PDF is converted into the dynamic weight coefficient of the kernel function, and a nonlinear weight dynamic model with time delay is established. Based on this model, a reasonable optimal fault detection method and diagnosis method are obtained by using the linear matrix inequality (LMI)

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