Kozko K. Capacitive gravimeter of automated airborne gravimetric system

The thesis is devoted to the research of new capacitive gravimeter of automated airborne gravimetric system (AGS). Existing types of AGS gravimeters are analyzed and capacitive gravimeter as new type of gravimeters is proposed. Author describes schematic diagram of transducer, calculates mathematical model, performs analysis of main errors and their sources as well as ways of their decrease or elimination. Results of research were covered by patent. AGS capacitive gravimeter output signal filtration task is solved by setting the eigenfrequency equal to frequency in the intersection point of signal and main noise spectral density diagrams. Computer simulation determines work modes that could cause resonance and therefore are most dangerous. An approach that can eliminate resonance is proposed. Neural network is shown to be useful in the residual errors elimination task. Reasons of such errors could be vertical acceleration as well as instrumental errors. Test bench for lab research of new capacitive gravimeter has been made. New capacitive gravimeter has guaranteed measurement precision of 1 mGal. That is twice more precise than well-known airborne gravimeters that cannot perform better as of 2 to 10 mGals. Data processing speed is 10 times more than usual due to airborne measurement automation.