Development and Examination of a Relay System for Automatic Control of Emission Frequency for Submerged Hydrodynamic Generators

A relay system for automatic control of emission frequency for a submerged hydrodynamic generator has been developed and examined. This system provides hydromechanical equipment operation calibration for formation dominant frequency. Mathematical model incorporates the presence of a long hydraulic line in a form of an extended well through which an actuating signal passes. Analytical expressions for amplitude and frequency of auto oscillation occurring in the system are obtained. The increase in delay time in the hydraulic line is found out to result in the decrease of frequency and increase of auto oscillation amplitude that is undesirable for efficient realization of vibroseismic impact. Numerical simulation of control system operation has demonstrated the qualitative validity of obtained theoretical findings.