Journal article
Adaptive control of bucking on harvesters: target and timing effects
Forest Products Journal, Vol.56(11/12), pp.79-83
2006
Abstract
Optimally bucking individual stems, based on market prices, is unlikely to provide log product yields that meet order book constraints at the harvest unit or forest level. Adaptive control, in conjunction with dynamic programming, has been shown in earlier research to provide superior results from stem and stand log bucking when the stand is subject to order book constraints. Adaptive control can be achieved by adjusting relative prices and small-end diameter specifications as the harvester progresses through the stand. In this paper, the simulated effects on overall apportionment degree of varying 1) target proportions for given log types and 2) update frequencies are examined. The results show that varying the target proportions provided the best overall apportionment degree in only one of four test Pinus rudiata stands, compared with holding the target proportions constant. Also, no significant differences in apportionment degree were found when examining update rates from 4 to 512 stems in both of the two test stands.
Details
- Title
- Adaptive control of bucking on harvesters: target and timing effects
- Authors
- Glen Murphy (Author)Mauricio Acuna (Author)D Amishev (Author)
- Publication details
- Forest Products Journal, Vol.56(11/12), pp.79-83
- Publisher
- Forest Products Society
- Date published
- 2006
- ISSN
- 0015-7473
- Organisation Unit
- University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
- Language
- English
- Record Identifier
- 99450149402621
- Output Type
- Journal article
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