ECA Group demonstrates its AUV advanced robotics features during SWARMS’ Black Sea Demonstration

Tuesday, July 18 2017

A sea demonstration was held in the access channel to the Black Sea port of Mangalia, Romania 03-13 July 2017 in the framework of the H2020 EU funded project SWARMS.

ECA Group successfully demonstrated two advanced robotic features on an experimental version of its A9-E modified specially for the SWARMS project. The modifications included an extra acoustic modem with network protocols from Evologics fitted in a modified front payload section and an additional advanced autonomy interface on-board computing capabilities 

  • The new modem allows the inclusion of  the experimental A9-E in a multiple access capable underwater communication network. While ECA Group routinely uses underwater communications for mission monitoring and control, these have been mostly point to point until now. The use of a multiple access acoustic network deconflicts the use of multiple vehicles operating in the same area. Using an USV as a WiFi and RF gateway,  a status vector including AUV position, speed, etc was successfully displayed on the topside SWARMS multi-vehicle mission management tool. 

 

  • The  advanced autonomy interface was developed to allow mission parameters to be adapted on the fly. In previous mode of operation, most often only a pre-programmed mission plan is executed. As an example of the new mode, real-time quality analysis and control of a bathymetric survey conducted using a COTS Klein 3500 interferometric side-looking sonar was demonstrated. A quality factor was extracted in real-time, on-board  the experimental A9-E, from the raw sonar data. This quality factor measures the so-called interferometric baseline decorrelation, which can result from many factors including  reduced signal to noise, or multipath interference in shallow water, and degrades the accuracy of the depth soundings. The quality factor measurement  was used to adapt the altitude of the survey between 4m and 6m (water depth varied from 5m to 8m over the test area) to minimize the baseline decorrelation and therefore increase the accuracy of the soundings. 

ECA A9 AUV operated in the access channel to the Black Sea port of Mangalia, Romania 03-13 July 2017 in the framework of the EU funded project SWARMS. 

 

Read more: SWARM's European Project: ECA Group provides innovative AUV's for environmental recognition & sensing

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