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Adaptive control of bucking on harvesters: Target and timing effects
journal contribution
posted on 2023-05-16, 19:52 authored by Murphy, G, Acuna, MA, Amishev, DOptimally 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 radiata 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. © Forest Products Society 2006.
History
Publication title
Forest Products JournalVolume
56Issue
11/12Pagination
79-83ISSN
0015-7473Department/School
School of Architecture and DesignPublisher
Forest Products SocietyPlace of publication
MadisonRepository Status
- Restricted
Socio-economic Objectives
Harvesting and transport of forest productsUsage metrics
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