TY CONF TI MATHEMATICAL MODEL OF THE WORKING PROCESS OF A HYDRAULIC MANIPULATOR OF A TIMBER TRANSPORT MACHINE TAKING INTO ACCOUNT THE SLOPE DURING SUBSIDENCE OF WEAK-BEARING SOIL UNDER OUTRIGGERS KW hydraulic manipulator KW boom lifting mechanism KW mathematical model KW analysis JO MODERN FORESTRY COMPLEX OF THE COUNTRY: INNOVATIVE DEVELOPMENTS AND RESEARCH AU Popikov, S.K. AU Yalovegin A., A.N. AU Popikova, A.V. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov