ROV DC servo systems

Aquabotix ROV with DC servo gearmotors for propulsion including androids and iPADs for control allowing a robot eye view of sea life.

“emulating the ergonomics and kinetics of marine ecosystems”  Designers from Aquabotix tasked with designing an intuitive and cost effective ROV with a live video stream.

The resulting product was the HydroView. At 4.5kg supplied with an IP rated case and a 25m umbilical incorporating localised Wi-Fi  communication from the pilot’s handheld device which is then connected to the ROV. FItted with Ultra bright LED lights and a High Definition camera for direct HMI.

The ROV’s stability is naturally highly dependent on its control system. High accuracy control is also required to enable accurate video inspection information. This control is achieved with three propellers on either side and the rear. The propellers are driven by a separate permanent magnet brushed DC motor from Swiss manufacturer maxon motor. maxon’s A-max motors were selected for  Because like all battery powered applications, maxon was also selected because they have a low mass and they are very efficient, allowing over three hours of operation.

The motors also required a very low resonance so as not to cause premature failures of the sealing system. This low vibration requirement is magnified when the driveshaft is taken through a sealing system so the motors are custom designed with quite long shafts and a tight runout specification.

With onboard Linux functionality it can be programmed in the users skill set language, including C or C++ however it also includes COCOA for iPAD. Android and PC versions can be programmed using Java.   The Rov movement can then be controlled in a video game fashion using the handheld device accelerometers.

About maxon Group Australia

maxon is a manufacturer of world-class precision drive systems. At maxon, we develop and build high precision electric drive systems that are among the best in the world. We combine brushed and brushless DC motors, gearheads, sensors, and controllers into complete mechatronic drive systems. Since 1961, businesses from a wide range of industries including medical technology, robotics, industrial automation, mobility, and aerospace place their trust in reliable drive systems by maxon. Our drives are perfectly suited for wherever extreme precision and the highest quality standards are necessary and where compromises cannot be tolerated – on Earth, and on Mars. We are driven by progress. We are certain that we can continuously improve – even what seems to be perfect – over and over again. We believe that outstanding engineers and technicians can make a positive impact on the world. This is why we support them in their efforts to go off the beaten path and provide the right drives for their ideas. We do this because we share in their uncompromising drive to excel in technology.

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