This article may be of interest to researchers who are designing new machine systems for felling-area works with autonomous energy supply. A methodology based on the decomposition method for creating an simulation functional model of a system consisting of a mobile wood chipper for felling-area works and a mobile energy module is proposed. The machine system of interest is an original technical solution. It consists of an autonomous energy supply module with powered by wood fuel external combustion engine and a logging machine for the production of wood chips. The functioning equipment units of the system is simulated using the MATLAB Simulink dynamic simulation environment. For the convenience of experiments, the use of LabVIEW virtual instruments is proposed for setting input and control parameters, as well as displaying output parameters. The input, control, disturbing and output parameters of each functional block of the system are described: gas generator, external combustion engine, electric generator, uninterruptible power supply, electric motor, propulsion device, wood chipper unit, hydraulic manipulator. It is supposed to use this simulation model to justify the main parameters of the autonomous system for the production of wood chips, as well as the further development of an automated control system.

Keywords: fuel chips, wood fuel, unmerchantable tree, simulation model, LabVIEW, Simulink, mobile chipper, autonomous power supply, logging

Optimization of technical parameters of the complex for climate control beehives allowed to choose the optimal ratio of the technical parameters of the equipment in accordance with the optimization objective. Evaluation of the efficiency of the self-contained complex is considered in two aspects: in relation to conversion and transmission of energy and in relation to the specific consumption of material resources. In this regard, was chosen two criteria characterizing the efficiency of the complex - the energy efficiency and material capacity. In article presents a methodology to optimize constructive parameters of the energy supply system based on the combined solar plant. The resulting optimal ratio of the parameters are the basis for the engineer's decision that design complex for climate control beehives.

Keywords: optimization, efficiency, system power supply, renewable energy