Дослідження методів вимірювань параметрів траєкторій у системах ближньої радіонавігації

Abstract

In this master's qualification thesis the presented researches which are connected with determination of location of the aircraft at different spatial configurations of radio navigational system and aprioristic data on the camp surrounding environments. The estimated potential accuracy of basic methods of determination of location of the aircraft on condition of reception of strong and weak signals. It is shown that the accuracy of determination of location directly depends on the accuracy of measurements of the chosen navigation parameter. In this regard it is desirable to have structures of radio navigational measuring instruments which provide the greatest possible accuracy of measurements under existing conditions. In this work synthesis such structures are executed by methods of the theory of an optimum nonlinear filtration of Markov casual processes. Expressly that the exact equations of an optimum nonlinear filtration cannot be realized in practice, and approximate methods are based on different approximations of a posteriori density of distribution of probabilities of transition which are components of the equations of Fokera-Planka-Kolmogorova. From the practical point of view the most acceptable there are approximation methods which are based on development in functional multidimensional ranks of nonlinear functions, a method small to parameter and different variations a method finding of an average in time Practical aspects of the theory optimum the nonlinear filtration is shown on the example of synthesis to the radio altimeter with expanded functionality. For this purpose there was a developed specified mathematical model of the radio altimeter which adequacy is confirmed with results of mathematical modeling. For sub-optimalny methods of estimation estimates of complexity of calculations and necessary resources are given in sense of speed and memory size. In economic part the taken-up questions of an assessment of costs of carrying out basic researches with application of means of modern computer facilities. In the section of protection of work and surrounding environments the considered actions for safety measures of work with application of modern computing means and a measure on a case of emergency situations.