Evolution of Electronic Acoustic Targets: Research of Subsonic Mathematical Models

Abstract

The paper presents the 25 years history of improvement of mathematical models of subsonic acoustic electronic targets at Computer facilities department of Kalashnikov ISTU and at Institute of Mechanics UdmFRC UB RAS; the models are widely used at enterprises for test and diagnostics of small arms to increase their accuracy. Models of targets with spatial placement of acoustic sensors, models with definition not only hit points, but also the object speed are shown, in each model reasonable simplifications of physical processes are analysed. The physical model considering distribution of indignation from a point of hit not only by air but also on the shaper rubber is investigated. The major factors influencing the accuracy of definition of a point of hit are shown, mathematical and design methods on decrease in errors of work of an acoustic target, such as asymmetrical arrangement of acoustic sensors are given in target space at different distances for not degeneration of a system of the equations and an opportunity to use a standard four-channel digital oscillograph for communication, use of the weighed timepoints when processing signals from sensors for invariancy of orientation of sensors to a hit point, use of the damping laying for clearing of vibration hindrances from the shaper, use of secondary regression mathematical model for reduction of unaccounted errors. The conclusion is drawn on prospects of further researches and improvements of mathematical models, designs and element base of subsonic electronic acoustic targets on purpose increase in their accuracy, decrease in prime cost and, therefore, increase in competitiveness.