Pidchenko S. Development of the theory and realizable basics of invariant piezoresonance multifrequency devices and systems

The object of research - setting processes, stabilization and mode selection in multifrequency piezoresonance oscillatory systems; the aim of research - development the theory and realizable foundations provide technical invariance piezoresonance devices and systems based on the functional and algorithmic methods of compensation parametric nonstationarity a quartz piezoresonator mode multifrequency excitation; methods of research - invariant systems theory, the theory of automatic control theory extreme adaptive-systems theory of electrical circuits, theory of oscillations averaging method, the theory of differential and integral calculus, theory of elasticity, theory of heat conductivity tensor analysis, theory of experiment planning theory and the theory of measurement errors; results - first developed the concept of invariant piezoresonance multifrequency devices (PMD) with controlled dynamics; first developed a two-stage interval-approximation method of control; was further developed method several currents management piezoresonance multifrequency oscillatory system (MPOS); was further developed analytical and numerical method for determining the characteristics of complex multielement MPOS; improved methods of stress - analysis quartz resonator (QR); was further developed numerical-analytical method for the determination of thermodynamic characteristics of the QR; constructed a simulation model of a mechanical system QR; was further developed mathematical model of the dynamics of the invariant core PMD; proposed and theoretically justified the creation of a new class of PMD; the degree of implementation - implemented; area - instrumentation.