Abstract:
Disclosed is an underwater robot based on flapping comprising: an actuator including a smart material and directional material, wherein the smart material is changed in its shape according to an external signal, and the directional material restricts a deformation in a specific direction; a body connected with the actuator; and a controller which makes the actuator perform a first stroke in a direction, and a second stroke in another direction being different from that of the first stroke; wherein the actuator performs at least one deformation of bending and twisting according to position of the smart material and directionality of the directional material, and furthermore enables to simultaneously perform the smooth bending and twisting motion with the simple structure by adjusting the position of the smart material functioning as the active component, and the directionality of the directional material functioning as the passive component.
Abstract:
A MEUV that is able to navigate aerial, aquatic, and terrestrial environments through the use of different mission mobility attachments is disclosed. The attachments allow the MEUV to be deployed from the air or through the water prior to any terrestrial navigation. The mobility attachments can be removed or detached by and from the vehicle during a mission.
Abstract:
An unmanned, autonomous, ocean-going vessel including a primary hull and a rigid wing rotationally coupled with the primary hull that freely rotates about a rotational axis. At least one of the primary hull and the rigid wing includes at least one selectively floodable compartment configured to selectively flood to submerge the primary hull and at least a portion of the rigid wing. The vessel further includes at least one controller configured to maintain a desired heading. The vessel further includes a control surface element configured to aerodynamically control a wing angle of the rigid wing based on a force exerted by wind on the control surface element. The vessel further includes a rudder. The at least one controller is further configured to determine a rudder position and generate a signal to position the rudder. The vessel further includes a keel coupled with the primary hull.
Abstract:
Disclosed are an underwater moving apparatus and a moving method thereof. The underwater moving apparatus of an exemplary embodiment of the present invention includes a body; a propelling device installed on a rear side of the body; a thruster unit including an up and down directional thruster and a left and right directional thruster installed at the body; and a plurality of leg units positioned at both side portions of the body and including a multi-joint module.
Abstract:
In various embodiments a variable buoyancy profiling float is disclosed. The variable buoyancy profiling float may comprise a spherical glass housing comprising a first hemisphere and a second hemisphere. The first and second hemispheres may be coupled by a partial vacuum within the spherical glass housing. A buoyancy system may be located at least partially within the spherical glass housing. The buoyancy system may be configured to provide variable buoyancy control to the variable buoyancy profiling float. A sensor bundle may be mounted to the spherical glass housing and may be configured to measure at least one environmental parameter.
Abstract:
A seismic survey system records seismic signals during a marine seismic survey. The system includes at least two underwater bases and plural autonomous underwater vehicles (AUVs) that carry appropriate seismic sensors. An AUV is housed by an underwater base and it is launched to a final destination from the underwater base. The AUV receives pinger signals from at least two underwater bases for correcting its trajectory toward the final destination.
Abstract:
Systems and methods for adding buoyancy to an object are described herein. A buoyant material may be enclosed inside a flexible container, heated, and inserted into a free flooded cavity inside the object. The flexible container may then be formed to the shape of the cavity. After the flexible container is formed to the shape of the cavity, the flexible container may be cooled. The flexible container may hold a pre-determined amount of the syntactic material that provides a fixed amount of buoyancy. According to another aspect, systems and methods for packing a vehicle are described herein. In some embodiments, a buoyant material may be molded into the shape of a hull of a vehicle, and a plurality of cutouts may be extracted from the buoyant material which are specifically designed to incorporate one or more instruments.
Abstract:
A mechanized trolling device includes a flotation chamber, a power source and motor in a water-tight enclosed chamber, and a sheltered impeller. The device travels many times the distance that an angler can cast, and automatically shuts off after a set period of time. A fishing line attached to the device can be deployed so the angler can fish at the depth of the water where the device has travelled.
Abstract:
An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body having a head part and a tail part); a propulsion system for guiding the AUV to a final target on the ocean bottom; a jet pump group connected to the body and including plural jet pumps; a control device connected to the jet pumps; and a seismic sensor configured to record seismic signals. The jet pump group controls a steering of the AUV by generating water jets according to a given sequence.
Abstract:
A cleaning system includes a chassis supporting a propulsion system for propelling the cleaning system across a surface. At least one sensor of a first type is coupled to the chassis, and a surface engagement mechanism is configured to maintain the cleaning system coupled to the surface as the propulsion system propels the cleaning system across the surface. A cleaning device is coupled to the chassis and configured to abrade the fouling from the surface, and a controller coupled to the chassis and in signal communication with the propulsion system and the first sensor. The controller is configured to receive a signal from the at least one sensor of the first type and control the propulsion system in response to the signal.