Chepiuk L. Vibrating-string gravimeter of automated aviation gravimetric system

The new vibrating-string gravimeter of automated aviation gravimetric system (AGS) is researched in the thesis, its constructive scheme is developed, its mathematical model is made, the basic errors sources of vibrating-string gravimeter are researched and the ways to reduce them are proposed. The patent of Ukraine for an invention is obtained. The problem of filtering the output vibrating-string gravimeter signal from the biggest of hindrances the vertical aircraft acceleration, by setting its own oscillation frequency equal to the frequency of crossing spectral densities of the desired signal gravitational acceleration and signal interference basic vertical aircraft acceleration is resolved. It was offered for the first time to provide the linearity of the string gravimeter output characteristic to use the strain-gauge matter as the material strings. A digital computer simulation of the most dangerous resonant modes of the new vibrating-string gravimeter is done. The possibilities of using neural networks algorithms for the problems of development and operation of automated ACS with the new vibrating-string gravimeter in order to reduce instrumental errors of gravimeter are considered. An experimental setting in which the new vibrating-string gravimeter is researched are done. New vibrating-string gravimeter significantly increases measurements accuracy of the gravity force acceleration (1 mGal) compared with known manual gravimeters (2-10 mGal) and performance in 10 times.