System analysis of the dynamics of the harvester head of wheel harvester

The main concepts of system analysis as an integral part of the theory of systems are becoming an integral part of scientific and technical research in the forestry complex: integrity and connectivity in the internal functional space-time, built by the target functions of the system and its elements. Each branch of the national economy has its own ideas of the concept of a system of various structural levels from maximum to minimum and the corresponding intra-system functional space-time. In the forestry industry, complexes of machines and equipment that carry out technological processes of timber production can be considered as meso-system structures, then the technical operations of the machines and equipment themselves can be attributed to the micro level. In this article, from the systemic point of view, a single functional time of the internal connectivity of the flow of production operations with the harvester head of the wheel harvester is built. At present, the technological efficiency of machines and equipment is determined statistically on average in external time. An increase in labor productivity of forestry equipment complexes is possible only on the observance of the basic principle of system optimization: in a system consisting of interconnected interacting subsystems, the optimum for the entire system is not a function (for example, the sum) of the optima of the subsystems included in the system. This principle can be regarded as the theorem of the optima of the systems approach. Determination of the technological efficiency of the harvester head of the wheel harvester in the functional time of the connectivity of the performed technical operations in comparison with the average statistical approach reveals a more informative picture of the dynamics of the process and reveals the possibilities of better organization of labor. In the article, the dynamics of the work of the harvester head of the wheel harvester is investigated in the representation of the three-stage connectivity of the operations of timber production. In the first stage, the felling of wood takes place and the productivity of obtaining general wood raw material is determined; in the second stage, there are two superposition processes for obtaining assortments and wood waste, therefore, the productivity of the resulting wood waste, assortments and total wood raw materials is determined here; in the third stage, the woody crown material is obtained. The constructed systematic approach reveals the integrity and unity of the dynamic operations of the harvester head of the wheel harvester by determining the productivity of both each operation and their superposition in the functional time of the technological process.

1. Bazarov S.M., Belenkij Yu.I., Soloviov A.N. Fundamentals of system analysis of production processes. SPb.: SPbFTU publ., 2018. 60 p. (In Russ.)

2. Ergo Operation and Maintenance Manual. Ponsse Oyj, Finland, 2006, 958 p.

3. Derbin V.M., Derbin M.V. Improving cut-to-length timber. Forest Engineering Journal, 2015, vol. 5, no. 1(17), Voronezh: VGLTU publ., pp. 128–135. DOI: 10.12737/11270, URL: http://lestehjournal.ru/sites/default/files/journal_pdf/128-135.pdf (In Russ.)

4. Drushka K., Konttinen H. Tracks in the Forest. The Evolution of Logging Machinery. Timberjack Group. Helsinki, 1997. 253 p. ISBN: 952-90-8616-4

5. Fleischer M. Geschichte der Holzernte in Handarbeit. Proekte Verlag Cornelius GmbH, Halle/S. 1. Auflage, 2009. 212 p. ISBN: 978-3-86634-664-2

6. Kochegarov V.G., Bit Yu.A. Technology and machines of logging operations. Moscow, Lesnaya promyshlennost publ., 1990. 392 p. (In Russ.)

7. Operation manual, spare parts catalog Ponsse Ergo. Issue 0230197-0390001 (ENGLISH), Finland, 2012. 2541 p.

8. Shegelman I.R., Skrypnik V.I., Galaktionov O.N. Logging operations with the use of feller-bunchers, feller-skidders and cable-skidding machines: a textbook for university students of forestry engineering profile and specialists. Petrozavodsk: PetrSU Publishing House, 2013. 272 p. (In Russ.)

9. Shegelman I.R., Skrypnik V.I., Galaktionov O.N. Technical equipment for modern logging. SPb.: PROFI-INFORM, 2005. 344 p. (In Russ.)

10. Spare parts catalog Ponsse A090200. Ponsse Oyj, Finland, 2016. 431 p.

11. Svoikin F.V., Katsadze V.A., Birman A.R., Svoikin V.F., Ugryumov S.A. Comparison of the performance of logging machines. Repairs. Recovery. Modernization, 2020, no. 3. Moscow: Nauka I technologia publ., pp. 40–44. DOI: 10.31044/1684-2561-2020-0-3-40-44 (In Russ.)

12. Svoikin F.V., Katsadze V.A., Birman A.R., Svoikin V.F., Ugryumov S.A. Planning of rational volumes of logging in the winter harvesting period for multioperation logging machines in the middle taiga of the Komi Republic. Repairs. Recovery. Modernization, 2019, no. 12. Moscow: Nauka i technologia publ., pp. 40-43. DOI: 10.31044/1684-2561-2019-0-12-40-43 (In Russ.)

13. Svoykin V.F., Molchanova A.A. Research of productivity of forest machines. February readings. Collection of materials of the scientific-practical conference of the teaching staff of the Syktyvkar Forestry Institute based on the results of research work in 2013. Syktyvkar, SLI publ., 2014, pp. 370–373. (In Russ.)

14. Svoykin V.F., Sivkov E.N., Senkin V.A., Kozlovsky V.N. Research of the productivity of cutting machines depending on the parameter of the subject of labor. February readings. Collection of materials. In 2 vol. Vol. 1 / otv. ed. Yu.Ya. Chukreev; Sykt. forest. in-t. Syktyvkar: SLI publ., 2005. 152 p. (In Russ.)

15. Svoykin V.F., Tikhomirova I.K., Bolshakov A.S. Assessment of rational technologies of logging operations in the Komi Republic. Actual problems of the forestry complex / Ed. E. A. Pamfilova. Collection of scientific papers. Issue 11. Bryansk: BGITA publ/, 2005. 178 p. (In Russ.)

16. Svoykin V.F., Molchanova A.A. Research of the skidder performance in the middle taiga of the Komi Republic. Actual directions of scientific research of the XXI century: theory and practice. Syktyvkar: SLI publ., 2014, vol. 2, no. 5-4 (10-4), pp. 275–279. (In Russ.)

17. Valyazhenkov V.D., Grigoriev I.V. Modern machines and technological processes of logging operations. SPb.: SPbGLTA publ., 2009. 288 p. (In Russ.)