University of California

Regents of the University of Minnesota

Mohsen Saadat

Mohammad-Reza Alam

Mir Abbas Jalali

Alexandre Immas

Pieter James Gagnon

Autonomous underwater vehicles and systems are provided with fast stabilization and fine attitude control with a constant and high rotational speed flying wheel to rotate the vehicle's body with respect to its core and optionally a combination of reaction masses used in three perpendicular axes. The gimbal and the reaction mass inertial systems are used for fast response to any angular or linear disturbance coming from the ocean current or waves. When equipped for optical communications, the vehicle has an optical receiver and transmitter and controller that provides three levels of attitude stabilization: gimbal and the reaction mass inertial systems; isolated movable platform and fine optical beam steering for targeting the laser beam from the transmitter. The ability to maintain precise positioning allows multiple vehicles to be optically linked.

Linear and angular position stabilization and control of an underwater robotic system

A device for use in compressing or expanding a working fluid, such as a gas, includes a container, a piston, working fluid, ferrofluid, and at least one magnetic component. The piston includes a piston face. The piston face and the container define an interior cavity having a volume that varies in response to movement of the piston relative to the container. The working fluid and the ferrofluid are contained in the interior cavity. The at least one magnetic component has a magnetic field that exerts magnetic forces on the ferrofluid that stabilize the ferrofluid in a subset of the interior cavity. This displaces the working fluid within the interior cavity.

Growing community of inventors

Minneapolis, MN, United States of America

Mohsen Saadat