Abstract
The БРЭM-1M is equipped with a 20-ton crane to remove parts on tanks and armored vehicles. The longest reach of the crane can be up to 5320 mm. In order to determine the dynamic parameters of the crane, it is necessary to build a physical model and set up the motion differential equation. This paper focuses on building a physical model of the crane with the given assumptions and setting up differential equations of motion based on the Lagrange principle.