Process Capability Index as an indicator of input signal quality of the rock disintegration process

Abstract

The process of the disintegration of rocks, the mechanisms of mechanical disintegration and disconnecting tool wear has been studied for more than thirty years due to significant changes in the field of science and technology which cannot now remain without response. There were especially computers, sensors, monitoring and data archiving technologies, which have brought into this area of research new incentives. With the development of hardware and software research the possibility of fast data processing was again extended, and subsequently the use of appropriate algorithms enabled the options to proceed to identification and control of the system in real time. Since the stability and the course of the values of the input variables in the time crucially influence the process experiment a suitable method for evaluating the measured values was researched. This paper proposes the measured values of the process input parameters would be processed through the Process Capability Index Cpm using a linear filter with a forgetting factor. It gives examples of such processed data, which were obtained in experiments with different characteristics (random variable) of input variables. They are resulting from control structural changes and from the use of new technical means on a test stand.