The paper considers the description of the movement of a snow particle in a vertical feeder of a rotary snow blower, taking into account the impact phenomenon. The main purpose of the presented studies is to determine the general patterns when a snow particle hits a fixed shell of a vertical feeder, as well as to substantiate the conditions for the end of the impact and the transition to describing the motion of a snow particle by equations that do not take into account impact effects. To achieve this goal, a one-factor numerical experiment was carried out, in which the variable parameter was the value of the velocity recovery coefficient upon impact. As a result, possible trajectories of the movement of a snow particle, the nature of the change in the speed of movement of a snow particle, due to emerging impacts on a fixed surface, are obtained, as well as a condition is proposed that can be used as a condition for the end of the impact and consideration of further impactless particle motion. A comparison is made between the shock pulse and the pulse of the normal reaction of a vertical wall. An algorithm for determining the motion of a snow particle in the presence of one non-retaining bond and taking into account its impact is proposed.

Single-span mobile pendulum-type ropeways formed by two coupled self-propelled wheeled chassis of high load capacity and cross-country capability are a promising type of transport and reloading equipment under difficult operating conditions. This article discusses the problem of assessing the weight productivity of such mobile ropeways under various technological options and modes of their operation. A computational method for determining the productivity within the area of the possible use of mobile ropeways is presented, characterized by the magnitude of the span and the angle of inclination of the line of the carrying-traction rope between the terminal points of the route, as well as the weight of the transported cargo. It is shown that the weight productivity significantly depends on the duration of loading and reloading operations and therefore is a variable characteristic of a mobile ropeway, depending on the specific operating conditions (used lifting and rigging equipment, the qualifications of the service personnel, the weight and configuration of the transported cargo, the availability of storage sites, etc.).

Modern manufacturers of electric vehicles everywhere introduce regenerative braking control using the accelerator pedal. One of the difficulties in implementing regenerative braking is the interaction of the service braking system and the auxiliary one using a traction motor. In this regard, the concept of regenerative braking control with one pedal – the accelerator pedal. Currently, a similar concept is presented on many modern electric cars, such as the Tesla Model S, Tesla Model X, Hyundai Kona. The aim of study is the creation and subsequent debugging of an algorithm for controlling regenerative braking using the accelerator pedal in relation to urban public electric transport. The developed algorithm is implemented in the MATLAB/Simulink simulation environment. Using the available blocks and subsystems, a mathematical model of the movement of an electric vehicle has been compiled. A mathematical model of the movement of electric vehicle has been developed that allows testing and debugging of the algorithms being developed. Simulation methods have confirmed the operability of the proposed method of regenerative braking control by the accelerator pedal. The scientific novelty of the research lies in the synthesis of an algorithm for controlling regenerative braking in relation to the operation of public electric transport in an urban environment with frequent stops, traffic on roads with slopes and starting to climb. The practical utility (value) of this research lies in the possibility of using the proposed control algorithm in urban public electric transport with on-board energy storage, for example, in electric buses.

Single-span mobile ropeways of the pendulum type, formed with the help of two mobile transport and reloading rope complexes connected by a single rope system on the basis of self-propelled wheeled chassis of high cross-country ability and carrying capacity, are currently considered as a promising type of transporting equipment for solving many tasks in adverse natural and social situations. The article is devoted to an important technical task of ensuring the safe operation of rope complexes associated with the loss of overall stability and overturning of the wheeled chassis under conditions of significant operational loads from the tension of the rope system, creating an overturning moment. The original design of the device for the installation of outriggers is presented in detail, providing automated execution of the necessary technological work. The developed method of designing this device is based on the analysis of the kinematics of the movable structural elements of the device, which allowed us to establish the calculated dependencies for determining the main structural dimensions. The considered design and design methodology can be used in the creation of transport and technological machines of other functional purposes, during the operation of which situations of loss of overall stability and overturning are possible.

The mechanism for lifting the load of bridge-type cranes, as a rule, is placed on a cargo trolley moving along the crane bridge. The weight of the cargo trolley and the weight of the load create a bending moment on the bridge. The bending moment is the main force factor in the calculation of the metal structure of the crane, that is, its value largely determines the metal capacity of the crane. Therefore, minimizing the weight and size parameters of the lifting mechanism is one of the most important tasks in the design of bridge cranes. In the classical methods of calculating the mechanism for lifting the load of a bridge type crane, the elements of the mechanism are selected on the basis of their sequential calculation, taking into account the corresponding safety factors. This approach does not imply variation in the parameters of the lifting mechanism and does not allow achieving its minimum weight and size indicators. Minimizing the weight and size parameters of the lifting mechanism of a bridge-type crane can be provided by comparing various variants of its layout schemes. This can be achieved on the basis of multivariate calculation. Obviously, the multivariate calculation of the lifting mechanism of a bridge-type crane increases the amount of calculations and is very time-consuming to implement manually. This determines the relevance of developing a methodology for multivariate calculation of the mechanism for lifting the load of a bridge type crane and a computer program that implements it. The paper presents a methodology for multivariate calculation of the load lifting mechanism, which allows varying the multiplicity of the cargo polispast, the displacement step according to the classification group of the operating mode of the drum diameter selection coefficient and the minimum rope utilization coefficient, as well as the computer program that implements this methodology.

During operation, transport and technological machines and equipment experience significant vibration effects from the working environment, which are transmitted to the human operator through the cab seat. The negative impact of dynamic influences and vibrations transmitted through the seat to the operator is noted in many works. The use of vibration protection systems for operator seats requires their simulation and study on mathematical models, which is an urgent task in the design of such systems. Vibration protection systems with the effect of quasi-zero stiffness are promising. To study vibration protection systems with quasi-zero stiffness, a complex simulation mathematical model of a motor grader was developed, the movements of which are of a spatial nature. The model includes subsystems of supporting elements of the base chassis, vibration-proof supports of the operator’s cabin, and, finally, the vibration-proof mechanism of the operator’s seat. The last subsystem makes it possible to study vibration protection mechanisms with a given size of the zone of quasi-zero stiffness in the static force characteristic. Using the developed complex simulation model, the system’s responses to step actions exerted on the elements of the running equipment of the base chassis of the motor grader were studied. The effects on one of the wheels of the front balance axle and one of the wheels of the rear balance bogie of the motor grader were investigated. Two static power characteristics of the vibration-protective seat system were considered, one of which had a section of quasi-zero stiffness, and the second did not. According to the results of the computational experiment, it was established that the vibration protection system with a quasi-zero stiffness section provides maximum seat accelerations that are ten times less than a vibration protection system without a quasi-zero stiffness section. This confirms the promise of using vibration protection systems with the effect of quasi-zero stiffness.

The article presents scientific approaches to assessing the volume of solid municipal waste accumulation in order to determine standards using a distributed information system. The description of the automated information system and algorithms of its use is given, taking into account the experience gained by specialists of the Academician I.G. Petrovskii Bryansk State University when performing work commissioned by the Department of Natural Resources and Ecology of the Bryansk Region (contract No. 02-22 dated 01.03.2022).

The stickiness of soils is a huge problem in the development of earthmoving machines by working bodies, which leads to an increase in maintenance efforts, a decrease in productivity and, as a result, an increase in economic costs. The process of sticking itself has not been fully studied and is of interest from the point of view of its mathematical description, which makes it possible to reveal not only its physical nature, but also to find certain relations and dependencies when assessing the stress-strain state during the destruction of a soil mass. In the article, based on the mathematical apparatus and the energetic essence of soil destruction, the phenomenon of soil stickiness was investigated based on the adhesive-cohesive forces and friction forces arising on the surface of the working body during soil excavation. Based on the theory of modeling the physical processes occurring during soil excavation, the authors obtained dependencies that allow us to find the relationship between the normal and tangential component of stresses arising from the destruction of the soil mass. The obtained dependencies will allow us to develop technical solutions to combat the sticking of soil on the surfaces of the working bodies of earthmoving machines.