• Energy Research
• 11. Sustainability close
• UA close
• Russian close

The article considers mathematical approach to environmental quality management to improve the ecological comfort of living for the population. The problem of environmental management is described using a multi-factor model of quality of the environment with the weight coefficients of the importance of its components: atmospheric air, acoustic impact, soil, water resources, and green spaces, accessibility of natural and recreational areas. The values of weight coefficients of importance of influencing factors for environmentally comfortable living are determined by the method of expert assessment. A multi-factor model is used for detailed assessment of the ecological quality of the urban environment. The proposed quantitative approach also allows to compare the environmental comfort of the different residential districts or to study the dynamics of environmental comfort of specific urban area. Much attention is paid to scientific and methodological principles of management and the formation of the concept of «environmental quality». The strategy of environmental management with ecological foundation of various practical solution is shown. The plan of measures on organization of optimal management of quality of the environment to improve comfort of living for the population of the residential microdistrict of Tiraspol is presented. Graphical scheme of the results of integral analysis of various environmental indicators and assessments for improving the comfort of the environment is given. Realization of environmental quality management of the urban areas on the basis of a multi-factor model contributes to the gradual change of dangerous ecological conditions of environmental factors, to increase a comfort of the territory taking into account the real preferences and needs of the population.

The aim of this article was to analyze the profitability of using a multi-motor electric drive instead of a single-motor electric drive in a city vehicle to ensure the reduction of the electrical energy losses. To achieve the goal a mathematical model was used to calculate the energy losses in the singlemotor and multi-motor electric drives of a bus with a different number of traction induction motors. The calculation was carried out for the steady-state driving modes with different speeds and transient acceleration modes. The change in the load torque of the vehicle's motors due to the change in the rolling friction force of the wheels with a different number of passengers carried was taken into account. The novelty of the work is that the use of a multi-motor electric drive shown for the first time allowed the reduction in the energy losses in the traction induction electric motors when the vehicle is moving at a constant speed and during acceleration with a different number of passengers carried. Moreover, to obtain energy saving, the number of motors used in a multi-motor electric drive should vary depending on the speed and acceleration, as well as on the total load torque of the multi-motor drive. The formula was obtained analytically for the calculation of the number of motors of a multi-motor electric drive, which would ensure energy saving compared to a single-motor electric vehicle.