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Information × Registration Number 0219U003637, 0117U004881 , R & D reports Title Improvement of technical systems and devices at the expense of pulsed electromechanical converters and electrophysical technologies popup.stage_title Head Bolyukh Volodymyr Fedorovich, Registration Date 07-02-2019 Organization The Kharkov state polytechnical university popup.description2 Object of research: electromagnetic, electromechanical and thermophysical processes and fields in pulsed electromechanical converters and electrophysical technologies. The purpose of the research is to improve the technical systems and devices of scientific, industrial and defense purposes at the expense of pulsed electromechanical converters and electrophysical technologies. Methods of research - development of mathematical models of pulsed electromechanical converters and electrophysical technologies, development of new methods of non-destructive testing, justification of parameters and operating modes of systems and devices, development of original constructive solutions. Experimental testing of basic calculations and technical solutions on prototype models and instruments. Results of the research - The developed mathematical models and computer programs for linear pulsed electromechanical converters (LPEC) of the combined type. The device of shock cryogenic cooling of biological objects, the catapult of ballistic gravimeter, the short-circuit currents limiter, the device for the destruction of information on digital drives, the technique of electrodynamic acceleration of plasma formation in the atmospheric environment, and the electromechanical device for shock-mechanical removal of ice and snow from wires have been developed and experimentally tested. power transmission lines, magnetic pulse press for ceramic powder materials. Methods of ultrasonic control of elastic characteristics of thin-walled metal products by pulses of Lamb waves and control of hardness of metal of a long product by Rayleigh wave pulses are developed and tested. The methods of ultrasonic control of products from conductive and ferromagnetic materials by pulses of surface waves are proposed. For the excitation and reception of ultrasonic Rayleigh waves, it is proposed to use electromagnetic acoustic (EMA) transducers that are used to detect surface defects of products, both with a flat and curvilinear surface, for controlling large areas of surfaces, as well as rods and tubes of insignificant sizes. It is suggested to use the EMA methods for determining the physical and mechanical characteristics of the surface layers of controlled materials, including layers, as well as of thin films. Scientific novelty - The proposed method for estimating the efficiency of LPEC of different types and constructive performances using a complex criterion. The increase of the efficiency of LPEC, operating in high-speed and shock-power modes, due to a combination of converters of different type is proposed. The advantages of electronic circuitry with two-section capacitive drive are grounded. The optimization approach to the choice of LPEC parameters, which uses global and local optimization algorithms, is developed. Control methods are developed that provide an increase in the signal-to-noise ratio in the measurement of devices in the actual operating conditions of technical systems and devices. The distribution of eddy currents and their magnetic fields with various methods of excitation is determined, taking into account the material, shape and presence of defects. The developed methods of EMA control of products, which provide detection of surface and sub surface defects, can eliminate the "dead" zone, increase the sensitivity of control and the reliability of defects detection. Product Description popup.authors Гончаров Євген Вікторович Коритченко Костянтин Володимирович Кочерга Олександр Іванович Лучук Володимир Феодосійович Плєснецов Сергій Юрійович Сучков Григорій Михайлович popup.nrat_date 2020-04-02 Close