Design and dynamic performance study of buoyancy regulating system of autonomous underwater glider

Dynamic analysis shows that an autonomous underwater glider can keep gliding as long as the range of volume changes up to ±200 mL.There are two kinds of methods to change the volume of the autonomous underwater glider.The autonomous underwater glider is driven by an electro-hydraulic buoyancy regulating system,which consisting of outer bladder,inner tank,two-way pump,one-way valve and electromagnetic switch valve.Simulation with the AMESim software indicated that the working time and the volume change rate of the buoyancy regulating system were kept well.The volume change of the autonomous underwater glider was measured accurately by the sensors built in the inner tank,and its resolution was 0.76 mL.The working time while oil drain and oil absorption approximates to 80s under the pressure from 0.2 MPa to 1.5 MPa.The dynamic performance of the buoyancy regulating system meets the demands of autonomous underwater glider.