TY CONF TI MATHEMATICAL MODEL OF THE MOVEMENT OF THE PLUNGER OF THE DAMPING DEVICE OF THE HYDRAULIC DRIVE OF THE FORESTRY MANIPULATOR KW hydraulic manipulator; boom lifting mechanism; mathematical model KW damper JO ENERGY-SAVING AND ENVIRONMENTALLY SAFE TECHNOLOGIES OF THE TIMBER INDUSTRY – 2025 AU Popikova, A.V. AU Chernykh, A.S. AU Popikov, S.K. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov