The focus of this research was automatic visual tracking of realistic underwater objects. Powerful real-time ltering and correlation hardware was used to generate fullimage range and velocity maps at frame rates. These maps were in turn processed to provide object centroid position and rate. The object tracking system was tested experimentally on an underwater robotic vehicle, and qualitative r...

As part of a continuous research and development of underwater robotics technology at ITB, a visionbased distance measurement system for an Unmanned Underwater vehicle (UUV) has been designed. The proposed system can be used to predict horizontal distance between underwater vehicle and wall in front of vehicle. At the same time, it can be used to predict vertical distance between vehicle and th...

As a case study of a particular control methodology and as a practical contribution in the area of underwater vehicle control, we consider the problem of stabilizing an underwater vehicle using internal rotors as actuators. The control design method comprises three steps. The first step involves shaping the kinetic energy of the conservative dynamics. For the underwater vehicle, the control ter...

Surveillance missions for multiple autonomous underwater vehicle (AUV) system suggest the use of different modes of operation including organizing and keeping a predefined formation, avoiding obstacles, reaching static and tracking dynamic targets. While exploiting a leader-follower strategy to formation control and the vector Lyapunov function method to controller design, we use discrete-event...

This paper describes the unmanned underwater remotely operated vehicle (UROV) THETIS, an easy to operate vehicle suitable for exploiting water environments. The subsystems composing our system, as compared to conventional ROVs, are discussed and evaluated. The vehicle’s primary use, at the present stage of development, is to perform underwater observations as well as temperature, pH/dissolved O...

In the article it is proposed to improve wave power plants by using a primary manipulator converter (PMC) with the structure of a parallel six-mobile manipulator for converting energy of waves into mechanical energy. There has been developed a physical model of a primary manipulator converter confirming its functionality. There have been obtained geometrical dimensions of a primary manipulator ...

The addition of manipulators to small autonomous underwater vehicles (AUVs) can pose significant control challenges due to hydrodynamic interactions between the arm and the vehicle. Experiments conducted at the Monterey Bay Aquarium Research Institute (MBARI) using the OTTER vehicle have shown that dynamical interactions between an arm and a vehicle can be very significant. For the experiments ...