Multi-robot cooperation is a very important area in the field of robot. As we know, it is difficult to use a single robot to complete tasks independently. Often, people use multiple robots cooperation in order to compensate for the lack of individual ability. Multi-level robot can greatly improve the efficiency of the whole system. Compared to a single robot, a coordinated multi-robot system ha...

Underwater cameras are widely used to observe the sea floor. They are usually included in autonomous underwater vehicles (AUVs), unmanned underwater vehicles (UUVs), and in situ ocean sensor networks. Despite being an important sensor for monitoring underwater scenes, there exist many issues with recent underwater camera sensors. Because of light’s transportation characteristics in water and th...

In this paper, we study time-optimal trajectories for fully actuated planar underwater uehicles, with constraints on input forces. Using the Maximum Principle, we focus on the structure of singular extremals and their possible optimality.

This paper reports development of a novel, flexible hydrogel based capacitive pressure sensor. It features a simple design of hydrogel thin film sandwiched between two gold electrodes. The sensor shows linear increase in output with increase in pressure. The microporous network of hydrogel enables high water retention while its flexible and stretchable structure ensures usage over large areas. ...

A neural network based robust control system design for the yaw angle of autonomous underwater vehicle (AUV) is presented in this paper. Two types of control structure were used to control prescribed trajectories of an AUV. The results of the simulation showed that the proposed neural network based robust control system has superior performance in adapting to large random disturbances such as w...

A neural network based robust control system design for the trajectory of Autonomous Underwater Vehicles (AUVs) is presented in this paper. Two types of control structure were used to control prescribed trajectories of an AUV. The vehicle was tested with random disturbances while taxiing under water. The results of the simulation showed that the proposed neural network based robust control syst...

DTN is the latest growing technology breaking geographical barriers. The DTN layout & bundle protocol present a standard method for interconnecting heterogeneous challenged networks using asynchronous message switching. It furnishes a structure for dynamic routing, contact scheduling, naming, reliability and transmission status reports. Wireless Sensor Networks (WSNs) are often viewed as challe...

Today, underwater acoustic communication is developing for its various applications. For signal transmission in underwater using ocean/ sea/lakes/rivers as a medium an appropriate underwater acoustic system is required. The significant characteristic of ocean makes the underwater communication difficult using electromagnetic waves. The characteristics of an acoustic signal make a good candidate...

Abstract An experimental and computational investigation was conducted to study the interaction between bubbles generated by an underwater explosive (UNDEX) a nearby steel plate structure. The experiments were performed for different standoff distances investigate gas bubble rigid High-speed photography utilized capture bubble’s behavior, series of pressure transducers used record emitted histo...