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.