This paper studies the problem of simultaneous input and state estimation (SISE) for nonlinear dynamical systems with and without direct input-output feedthrough. We take a Bayesian perspective to develop a sequential joint input and state estimation approach. Our scheme gives rise to a nonlinear Maximum a Posteriori optimization problem, which we solve using a classical Gauss-Newton method. Th...

High-efficiency pressure-retaining sampling technology for obtaining seabed sediments is required studying marine geological history, the survival principles of microorganisms, and evolution earth life. In this paper, a novel submersible-mounted sampler capable collecting pressure-retained samples at full ocean depth designed. The structure scheme first presented, including unit, pressure-compe...

Autonomy of the marine submersibles is specified by type energy, fuel and oxidizers they use. As a rule, underwater objects small displacement with short mission time are equipped lithium-ion batteries. A number submersible power plants have air-independent which allows using an electrochemical generator (ECG) as energy source fueled hydrogen applying oxygen oxidizer. Each method storing reagen...

A Moving Horizon Estimator (MHE) is designed for a petroleum production well with an Electric Submersible Pump (ESP) installed for artificial lift. The focus is on estimating the flow rate from the well, the viscosity of the produced fluid, and the productivity index of the well. The software package ACADO is used to implement a Moving Horizon Estimator using a third-order nonlinear model. Simu...

Abstract In view of the problem that actual performance axial-flow pump is less than theoretical design value, Taking with a designed flow rate 350L/s as research object. The relationship between impeller head and outlet installation angle was studied. influence different blade angles on external characteristics analyzed. Through analysis corresponding to angles, shaft oil verified, basis for s...

Modern research in the field of oceanology Arctic region, studying ice conditions, environmental and climatic monitoring, prospecting hydrographic works, monitoring extended bottom structures, oceano-graphic measurements, search for sunken objects, chemical physical measurements aquatic environment, underwater objects topography cannot be imagined without use autonomous unmanned submersibles. U...