Medvedovska Y. Improvement of the input signal determination methods in the non-linear inertial pressure measurement channels. A manuscript

The thesis is devoted to the improvement of methods of input signal determination for pressure measuring channels in technically complex objects. The object of the study is the process of determining the input signals of nonlinear inertial measurement pressure channels on technically complex objects. The subject of the study is the methods of determining the input signals of measuring channels of pressure on technically complex objects. The aim of the work is to improve the methods of obtaining a reliable result of measuring pressure on complex technical objects. To achieve this aim comparison and analysis of methods of pressure channel input signal recovery have been done. In the study methods and their measurements accuracy were analyzed. Also, analysis has been conducted for measurement utilities and methods of decreasing errors in dynamic characteristics determination. Using the conclusions from the conducted analysis the method of inverse measurement problem solving has been proposed. It can recover input signal in nonlinear inertial systems. This method is based on Hammerstein model and genetic algorithm usage to solve minimization problems. The mathematical model of the nonlinear inertial measuring pressure channel is improved, which, unlike the known models, is suitable for solving the inverse problem of measurement in such a channel. The method of restoring the input signal of the measuring pressure channel is improved on the basis of the solution of the inverse problem of measurement, which, in contrast to the existing methods, takes into account simultaneously the nonlinearity and channel inertia. The method for determining the function of the transformation of the measuring pressure channel is improved, which, unlike the existing methods, takes into account simultaneously the inertia and nonlinearity of the channel.