A Dataset for Fault Classification in Rock Drills, a Fast Oscillating Hydraulic System

Abstract

This work describes the collection and properties of a publicly available rock drill fault classification data set, used for the 2022 PHM Conference Data Challenge. The data is collected from a carefully instrumented hydraulic rock drill, operating in a test cell while inducing a number of faults. Hydraulic pressures are measured at 50kHz at three different locations, resulting in a detailed pressure signature for each fault. Due to wave propagation phenomena, the system is sensitive to individual differences between different rock drills, drills rigs and configurations. Such differences are introduced in the data by altering certain parameters in the test setup. An important part of the data is therefore the availability of No-fault reference cycles, which are supplied for all individuals. These reference cycles give information on how individuals differ from each other, and can be used to improve classification.