Розроблено імітаційну модель однобітного сигма-дельта модулятора третього порядку, що дає змогу дослідити вплив параметрів компонентів модулятора на функцію перетворення модулятора загалом. За допомогою розробленої моделі досліджено вплив нелінійності інтеграторів на нелінійність модуляторів третього порядку з різними параметрами.
Здійснено моделювання періодичних процесів у коливних системах на основі Ateb- функцій без збурень. Розглянуто типи малих збурень, які діють на коливну систему. Розроблено відповідне програмне забезпечення, яке подає результати у графічному і табличному вигляді.
A simulation of periodic processes in vibration systems based on Ateb-functions without perturbation was done. The types of small perturbations that act on the vibration system are considered. Appropriate software that provides results in graphical and tabular form is developed.
Розглянуто принцип роботи і блок-схему селектора сейсмічних подій для авто- матичних пристроїв сейсмологічних станцій. Обґрунтовано вибір середовища для моделювання. Наведені результати імітаційного візуального моделювання.
The article deals with the work principles and the block scheme of the seismic actions selector for automated devices of seismological stations. The sphere modeling selection has been substantiated. The results of visual imitation modeling has been presented.
In this study, the process of tool plunging into the workpiece during external tooth cutting will be modelled. Cut-in is one of the most dangerous stages not only in gear turning, but also in any cutting process. The gear cutting process is analytically studied in terms of maximum chip thickness and, on this basis, recommendations for process design are offered. The developed simulation is able to calculate the appropriate cutting geometry for each revolution of the tool cut-in to the workpiece.
Analysis of the controlled object, as well as methods and models applied for controlling the heat supply process in a city and urban districts has been carried out. Simulation models of the controlled object functioning in the presence of alternative energy flows with different costs have been developed. The criteria and objective function for optimizing the city’s heat supply process have been synthesized and substantiated.
The paper focuses on the investigation and the simulation of the efficiency of a hybrid solar collector in a heat supply system consisting of two separate units, namely a heat storage tank and a flat solar collector, which are interconnected by pipelines. The study includes the analysis and calculation of the thermal parameters of the system for one day and the determination of the optimal values of the flow rate of the heat carrier in the solar collector and the mass of the heat carrier in the heat storage tank to achieve maximum thermal efficiency of the system.
The problems and solutions in the logistics of warehouse operations of the transport company are highlighted. The software for the implementation of the simulation model is defined. Simulation modeling of the functioning of the transport company's composition was carried out. The main stages in the implementation of the simulation model are considered. Created a context diagram for the simulation model and refined it using context diagram decomposition. The stages of creating a simulation model in FlexSim are considered.
The results of modelling and investigation of external and internal gear-cutting processes using the power skiving method are presented. The principles of constructing a geometric model of undistorted chip formation are described, based on parameters from which cutting forces are calculated. It is found that, under identical conditions, the cutting force is three times greater when internal gears are cut than when external gears are cut. The influence of this force on the machining error is determined by the gear pitch parameter.
The review is devoted to the new monograph “Reality +: virtual worlds and problems of philosophy” by the famous philosopher David Chalmers. As can be seen from the title of the book, in it the author examines the philosophical potential of virtual reality for the possible solution of philosophical problems, namely: from ontology (problems of reality and hypotheses about simulation) to values (a good and happy life in virtual reality).
The formation of the microtopography of the machined surface is one of the most critical factors in ensuring the effective operating properties of the product. These are indicators such as wear resistance, fatigue strength, provision of friction parameters of moving joints, etc. The most important reason for the formation of microroughness is vibration in the technological surface of the machine-tool-tool-tool-workpiece. This article is devoted to describing a new method of modelling the dynamic processes of machining.