Application of Inductive Sensors in the Study of Fast Processes
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Application of Inductive Sensors in the Study of Fast Processes S. I. Gerasimova, b, c, d,*, V. I. Erofeevc, A. V. Zubankova, b, V. A. Kikeevc, d, E. G. Kosyakb, P. G. Kuznetsovb, and V. V. Pisetskiib aRussian
Federal Nuclear Center, All-Russia Scientific Research Institute of Experimental Physics, Sarov, Nizhny Novgorod oblast, 607188 Russia b Sarov Physical and Technical Institute, Branch of National Research Nuclear University MEPhI, Sarov, Nizhny Novgorod oblast, 607186 Russia cFederal Research Center Institute of Applied Physics, Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Nizhny Novgorod, 603024 Russia dAlekseev State Technical University, Nizhny Novgorod, 603950 Russia *e-mail: [email protected] Received November 13, 2019; revised November 13, 2019; accepted February 5, 2020
Abstract—Launching and control of pyrotechnical systems at a specified coordinate is among the most complicated problems in the tests at a missile track. A method for launching and a corresponding device are proposed for activation of pyrothechnical systems of missile trains boosting along an ejection path to hypersonic velocities with ejection of an object to free flight. The method is based on generation of current pulses for activation of pyrotechnical systems of the moving stages of a missile train using inductive sensors. The principle can also be used for implementation of a noncontact method for activation of recording systems and a device for measurement of the mean velocity of an ejected object in continuous media. The method is based on the generation of starting signals (positive rectangular pulses) for activation of recording equipment with matching relative to the specified coordinate and measurement of the velocity of the ejected object at the moment when it passes through the measurement cross section. Methods for activation of recording systems and results of hydrodynamic and terradynamic experiments are presented. DOI: 10.1134/S1063784220080071
INTRODUCTION A system for activation of pyrotechnical equipment (PE) of the stages of missile trains (MTs) provides sequential launching of the MT linear stages and ejection of the test object (TO). Modern systems for activation of the PE of the MT stages are contact systems. Such systems that can easily be implemented and employed provide generation of actuation signals for a moving MT but can work only at relatively low velocities of less than 1200 m/s. In this regard, it is expedient to develop a system for noncontact activation of the MT PE. Aeroballistic, hydrodynamic, and terradynamic tests must employ high-accuracy chronographing systems for measurement of the velocity of ejected objects (EOs) using the time-of-flight method and detection of EO during the free flight, especially, at relatively high velocities. The time-of-flight method for the measurement of velocity and EO detection on a trajectory necessitates measurement of the time corresponding to the current position of EO. Commonly, contact se
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