Nakonechnaya O. Modeling of processes of signals adaptive processing of multi-element transducers with respect to the acoustic-emission control method

The object of the research is the processes of signals adaptive processing of measuring channels in the systems of acoustic-emission control. The aim of the dissertation is to create methods and tools of mathematical and computer modeling of processes of signals adaptive processing of multi-element transducers in the systems of acoustic-emission control which provide quality fault location problem solving and recording the forms of acoustic-emission signals. During the research linear algebra methods, inconsistent algebraic systems solving methods, mathematical model methods of dynamic objects, methods of dynamic objects identification and signals upgrading, methods of computational processes parallelization have been used. The academic novelty of this work is determined by the following results: 1. The first dynamic model of the acoustic signals transducer in view of convolution integral operator is offered. Digitalization of convolution integral operator through z-transformation tools allows to get stable numerical algorithm of modeling and signals processing. 2. The first the method of direct identification of integral dynamic model of acoustic emission signals sensor based on model numerical implementation through its representation in view of multiple integration steps is offered. It allows to get output computation of model characteristics which are stable to high-frequency interference in basic data. 3. The first the way of accuracy in acoustic emission signals recording based on problem solving of transducer incoming signal reset according to its model and an experimentally got output signal is offered (inverse dynamic problem) and the method of computational processes parallelization of adaptive processing of acoustic emission signals. This research has the following practical value. Applied methods and tools of modeling of processes of signals adaptive processing of acoustic emission signals allow to study the capacity and quality of different kinds of mathematical and computer support for defective location problems solving and reporting the forms of signals in the acoustic emission control systems of technical objects that are designed and developed. Invented programs can be used as the ways of signals processing in existing or developed systems of diagnostics and control.