Dynamic simulation of buoyancy engine of underwater glider based on experimentation
As a key component for underwater gliders, the buoyancy engine plays an important role in the operation of gliders, the performance of which directly affects the monolithic reliability. In this paper, to lower costs of research on the buoyancy engine, a dynamic simulation is established by AMEsim software, in which the performance of the low-pressure boost gear pump and that of the high-pressure hydraulic axial piston pump are analyzed. And based on the simulation results, an experiment is designed to verify validity of the simulation. The method of buoyancy engine simulation in this paper may provide a valuable reference for designers.
The autonomous underwater glider "Spray"
A small (50-kg, 2-m long) underwater vehicle with operating speeds of 20-30 cm/s and ranges up to 6000 km has been developed and field tested. The vehicle is essentially an autonomous profiling float that uses a buoyancy engine to cycle vertically and wings to glide horizontally while moving up and down. Operational control and data relay is provided by GPS navigation and two-way communication through ORBCOMM low-Earth-orbit satellites. Missions are envisioned with profile measurements repeated at a station or spaced along a transect. The initial instrument complement of temperature, conductivity, and pressure sensors was used to observe internal waves and tides in the Monterey underwater canyon.
The Butcher of Amritsar: General Reginald Dyer
Chapter 1: Simla Chapter 2: Cork Chapter 3: Ireland and Burma Chapter 4: The Black Mountain Chapter 5: The Relief of Chitral Chapter 6: Staff College Chapter 7: Instructor Chapter 8: The Zakka Khel Chapter 9: Hong Kong Chapter 10: The First World War Chapter 11: Seistan Chapter 12: The Sarhadd Chapter 13: Pyrrhic Victory Chapter 14: Abbottabad