The sawing performance index for a modern harvester

Jukka Salmikuukka

VTT Automation, Risk Management

P.O. Box 1306

FIN-33101 Tampere FINLAND

Abstract: The monitoring system of a chainsaw can be used for keeping track of the performance and condition of a chainsaw. During monitoring, a substantial amount of data is collected. This raw data must be processed into useful information, which then can be utilised in many ways. A performance index presented here is based on a statistical model of sawing times. The index gives a valuable information to the user of the harvester. In many cases failure that occurs is hidden. Even when the failure is increasing the sawing times, the increment of the sawing times is not necessary visible for the user of the harvester. With the index, the user can observe possible changes in the performance of a chainsaw and detect failures before they cause more serious damages. The index also gives an indication whether it is time to change or sharpen the chain.

Résumé: Jukka Salmikuukka worked already before his graduation as a statistician in several projects in the University of Jyväskylä. After graduation he has worked for short time as an assistant and as a research scientist in the Department of Statistics, University of Jyväskylä. Jukka Salmikuukka joined the Technical Research Centre (VTT) in 1998. At the time Jukka Salmikuukka is working in several projects, which are focused to reliability and maintainability issues, for example industrial condition monitoring.