The article discusses the theoretical foundations of the design of a single-channel ultrahigh frequency moisture meter with direct measurement of the moisture content of bulk materials. In accordance with the requirem...
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ISBN:
(数字)9798350353907
ISBN:
(纸本)9798350353914
The article discusses the theoretical foundations of the design of a single-channel ultrahigh frequency moisture meter with direct measurement of the moisture content of bulk materials. In accordance with the requirements of the methodology for selecting efficiency criteria, it is necessary to develop structural diagrams of measuring devices. For these purposes, the standard deviation of the random error is determined, characterizing the accuracy. It includes the main components: sensitivity error, zero error and additive component. Mathematical models of structures are constructed and the standard deviation of random errors, which are caused by certain parameters and additive fluctuations, is calculated. A single-parameter ultrahigh-frequency method for determining the moisture content is proposed. This method provides high accuracy of a single-channel ultrahigh frequency moisture meter with direct measurement of the moisture content of bulk materials. The measuring device can be used in the agricultural industry, where humidity is one of the important parameters, starting with harvesting and ending with the release of finished products.
The aim of the project was to build a prototype of a turbine drive with a controllable thrust vector for a long-range vertical take-off and landing (VTOL) aircraft. The construction of the prototype required the devel...
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The scale of manufacturing industry is huge, and the production of a product requires the cooperation of many enterprises. Based on blockchain technology, for the traceability of manufacturing production data, this pa...
The scale of manufacturing industry is huge, and the production of a product requires the cooperation of many enterprises. Based on blockchain technology, for the traceability of manufacturing production data, this paper designs a reasonable incentive method to encourage enterprises to actively upload manufacturing data and build a perfect blockchain traceability platform. Then, the paper establishes a game model for enterprises to upload data, and uses evolutionary game theory to analyze the model to study the strategy selection process of enterprises under the blockchain traceability system. Finally, use simulation to verify the evolution path of the game under different parameters.
The article deals with the navigation system elements development process. The movement and positioning of a two-wheeled mobile robot with a high level of accuracy are realized through this system. Also, the algorithm...
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The paper deals with the problems of grain wounding requires large energy costs, requiring a multi-stage process of grain processing, installation and perfect and reliable automation systems for the storage and proces...
The paper deals with the problems of grain wounding requires large energy costs, requiring a multi-stage process of grain processing, installation and perfect and reliable automation systems for the storage and processing of raw materials, theoretical and experimental studies and the results of the use of the microwave method in measuring the moisture content of grain and grain materials. The method under consideration is based on the principle of selective absorption of microwave radiation energy by water in materials and its derivatives. By the degree of absorption of radiation, the concentration of moisture is judged. The paper investigates the amplitude and phase methods of the passing wave in free space. The influence of the elastic properties of the material under study on the electrical characteristics of the microwave wave, suggesting fundamentally new ways of measuring the attenuation and phase shift of the electromagnetic wave, including discrete conversion of the signal of the primary converter, which does not require rigid metrological support and the use of a phase shift, is substantiated. Information on the values of the thickness of the material is analyzed in order to correct the influence of this value, consisting of two parameters: the signal of the passing wave, the attenuation and phase shift which characterizes the humidity and the additional signal - the phase wave reflected from the front surface of the materials and carrying information about its thickness.
The article provides a theoretical analysis of the ultrahigh frequency (microwave) method of humidity measurement, discusses the problems of instrumentation of the method in question, and proposes a scheme of an exper...
The article provides a theoretical analysis of the ultrahigh frequency (microwave) method of humidity measurement, discusses the problems of instrumentation of the method in question, and proposes a scheme of an experimental installation. Bulk cotton materials were selected as the objects of research. The electromagnetic wave radiation is analyzed during measurement and the evaluation of electrophysical characteristics requires the study of the functional dependence of the amplitude and phase shift on the mass ratio of humidity, mathematical models for various bulk cotton materials describing the joint effect of humidity, material density on the attenuation and phase shift of the passing wave are obtained.
With rapid growth and a higher standard of living, the demand for usable energy has increased tremendously over the last few decades, with the construction industry being one of the most notable examples. The energy e...
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This paper studies an event-tniggered control problem for nonlinear systems subject to both external disturbancoes and dy namic *** is assumed that the system satisfies a global sector bound *** avold infnitely fast s...
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This paper studies an event-tniggered control problem for nonlinear systems subject to both external disturbancoes and dy namic *** is assumed that the system satisfies a global sector bound *** avold infnitely fast samplng,a novel eventriggred sampling mechanism is propoeed,which use8 not only the measuned system state but also an estimation of the inluence of the *** the propoeed design,the intersampling intervals an be lower bounded by a poeitive constant,and it is independent of botb external disturbances and dynamie ***,the doeedl loop event-tniggered system i proved to be input-torstate stable with repect to the extemal *** smalgain techmigues are;used for the stability analysis of the dloeeil-bop system.
Assuming agents possess sensing capabilities and dynamics relative to their body coordinate frames, this paper addresses a displacement-based strategy for discrete-time formation control through attitude synchronizati...
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The increasing adoption of electric vehicles (EVs) as a sustainable and efficient alternative to conventional gasoline-powered vehicles highlights the critical need for a reliable and effective charging infrastructure...
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ISBN:
(数字)9798331529376
ISBN:
(纸本)9798331529383
The increasing adoption of electric vehicles (EVs) as a sustainable and efficient alternative to conventional gasoline-powered vehicles highlights the critical need for a reliable and effective charging infrastructure. This paper introduces an advanced control strategy for a power-split hybrid transmission system, which integrates a bi-directional DC-DC converter to optimize power management in hybrid and electric vehicle applications. The system architecture, incorporating a planetary gear system alongside motor and generator components, functions as a variable ratio gear, enabling smooth and efficient energy distribution. MATLAB/Simulink simulations assessed the system's performance under acceleration and regenerative braking conditions, highlighting the converter's ability to manage energy flow effectively between the battery and motor. The research investigates the differences between isolated and non-isolated DC-DC converters, highlighting the benefits of both designs in a variety of applications. Isolated converters improve safety and noise isolation; however, non-isolated systems are more compact and cost-effective. The results demonstrate the proposed system's ability to utilize electrical power exclusively during vehicle maneuvers, optimize energy efficiency, and reduce reliance on mechanical power. This research underscores the potential for advanced DC-DC converter topologies to enhance power management strategies in hybrid systems, providing valuable insights for future innovations in energy storage, power conversion, and electric vehicle technologies.
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