Biblio

From the perspective of time domain, the propagation characteristics of sound waves in seawater can be seen more intuitively. In order to study the influence and characteristics of seamount on low frequency acoustic propagation, the research of this paper used the Finite Element Method (FEM) based on time domain to set up a full-waveguide low-frequency acoustic propagation simulation model, and discussed the influencing laws about acoustic propagation on seamount. The simulation results show that Seamounts can hinder the propagation of sound waves, weaken the energy of sound waves. The topographic changes of seamounts can cause the coupling and transformation of acoustic signals during the propagation which can stimulate the seabed interface wave.

Cyber-physical systems contribute to building new infrastructure in the modern world. These systems help realize missions reducing costs and risks. The seas being a harsh and dangerous environment are a perfect application of them. Unmanned Surface vehicles (USV) allow realizing normal and new tasks reducing risk and cost i.e. surveillance, water cleaning, environmental monitoring or search and rescue operations. Also, as they are unmanned vehicles they can extend missions to unpleasing and risky weather conditions. The novelty of these systems makes that new command and control platforms need to be developed. In this paper, we describe an implemented architecture with 5 separated levels. This structure increases security by defining roles and by limiting information exchanges.