Evolution of Electronic Acoustic Targets: Research of Supersonic Mathematical Models

Abstract

The paper considers the history of improvement of mathematical models of supersonic acoustic targets for small arms at the Computer facilities department of ISTU of M. T. Kalashnikov and at Institute of mechanics of the Ural Branch of RAS in 25 years. Electronic acoustic targets are widely used for test and diagnostics of small and artillery arms on productions and military acceptance and increase in their accuracy. Models of targets with various placement of acoustic sensors are investigated, targets firing practice, invariant to a position, and the targets working in the open air at a windy situation are analysed with reasonable simplifications of physical processes in each model. 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 are given, such as: the asymmetrical arrangement of acoustic sensors in a frame design for non-degeneration of system of the equations, the use of the weighed timepoints when processing signals from sensors for invariancy of orientation of sensors, the accounting of moderate laminar wind at tests by reasonable complication of mathematical model and increase in number of sensors, the accounting of an angle of a course and hade of a trajectory of an object in target space for definition of the departure point by transformation of coordinates in mathematical model, and the use of secondary regression mathematical model for reduction of unaccounted errors in the open air. The conclusion is drawn on prospects of further researches and improvements of mathematical models of supersonic electronic acoustic targets to increase their accuracy and decrease their prime cost.