Xponential Commercial Part 2 | Show report recognition and dynamic typography in mapping data. Silvus showcased its StreamCaster PRISM sectorised MIMO antenna array, which has been designed as a modular and mobile solution for air and ground data links, with quick installation at semimobile positions in mind. “To the end-user, set-up is completely toolless – everything from antennas to integrated StreamCaster MANET radios just snap-fits into place, while still being secure, and able to accommodate all different kinds of mast poles,” Carraway said. “A modular solution, each sector provides up to 90° to 120° of coverage, making it easy to connect three in an array to get up to 360° coverage, with L-band, S-band and C-band systems available.” Tersus GNSS exhibited its new BX50 GNSS Boards for integration and its AG992 auto-steering system, which has been developed with automating precision agriculture, particularly tractors, in mind. “We released them just this year, not long after releasing our TAP service at the end of last year,” said Nick Zhu at Tersus. “TAP is Tersus’ own PPP [Precise Point Positioning] service that provides real-time, centimetre-level correction via satellite link. As farmers can’t install base stations for every time they need RTKgrade precision, and there can be rules or range difficulties preventing them from using such radio frequencies, PPP is a must for agricultural applications.” The BX50 GNSS board can do RTK and PPP simultaneously and independently, which can be integrated for various applications like precision agriculture, uncrewed systems and robotics, construction and surveying. It can achieve 8 mm accuracy in RTK mode and 15 mm accuracy in PPP mode. The AG992 system typically consists of a 152 x 62.2 mm GNSS antenna, a 281 x 181 x 42 mm control terminal and a 410 mmdiameter electric steering wheel. Overall, the system conventionally achieves autosteering accurate to within 2.5 cm, with a three-minute convergence time. Plettenberg spoke with us about its new Nova X-Series electric motor, which was developed following discussions with its customer, Dufour Aerospace (covered in Issue 52), on some specific qualities needed in its Aero2 UAV’s tail motor. “Dufour are very serious about making their Aero2 certifiable, and the tail motor is safety critical, so they needed redundancy in it to validate its safety for aviation authorities one day,” said Bastian Greiner of Plettenberg. “To provide what they needed, we took inspiration from past e-motor designs with multiple winding segments, and so added three different winding segments into one of our Nova 15-Series designs.” Each winding segment is powered by a completely different, independent ESC, so that if one should fail, the other two continue running and powering the motor to enable an emergency landing. The design was developed into the Nova X-Series (X signifying multiple winding segments), although it can be adapted and applied to other Plettenberg motor designs for customers hoping to certify their UAVs. “It’s not a cheap solution, but compared to a coaxial motor set-up, as the route most taken towards motor redundancy, it saves quite a bit of weight, as well as saving on an additional propeller,” Greiner added. The company has also developed its Nova Maritime Series electric motor for USVs, UUVs and maritime UAVs (the latter still subject to corrosion when flying missions at sea with sub-optimal motors). “Again, this is a new design, based on the Nova 15 as a template, but with all the materials replaced with seawater-proof, down to every screw, every seal, the housing, the shaft, everything, with an IP67-rating,” Greiner said. “We’re also applying some of those technologies and lessons learned to other motors and applications, with different combinations of the waterproof parts as needed. USVs in particular are growing fast as a target segment for us for the next few years.” 113 Uncrewed Systems Technology | August/September 2024 Silvus Technologies’ DOCK StreamCaster Tersus GNSS’s AG992 auto-steering system
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