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Process of quantitative evaluation of validity of rock cutting model

Keywords: rock , cutting , drilling , acoustic signal

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Abstract:

Most of complex technical systems, including the rock cutting process, are very difficult to describe mathematically due to limitedhuman recognition abilities depending on achieved state in natural sciences and technology. A confrontation between the conception(model) and the real system often arises in the investigation ofrock cutting process. Identification represents determinationof the systembased on its input and output in specified system class in a manner to obtain the determined system equivalent to the exploredsystem. Incase of rock cutting, the qualities of the model derived from aconventional energy theory ofrock cutting are compared to thequalitiesof non-standard models obtained byscanning of the acoustic signal as an accompanying effect of the surroundings in the rock cuttingprocess by calculated characteristics ofthe acoustic signal. The paper focuses on optimization using the specific cutting energy andpossibility of optimization using the accompanying acoustic signal, namely by one of itscharacteristics, i.e. volume of totalsignal Mrepresenting the result of the system identification.

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