104 Greene Rubber Company, a specialist in shock and vibration mitigation since the 1930s, exhibited its growing range of isolation mounts designed to protect sensitive UAV components. Bob Schleicher highlights the company’s focus on adapting its aerospace-grade technology to UAVs. Its UAV-specific mounts are tailored for relatively small, light payloads. One key advantage of these mounts is their dual functionality in addressing both continuous vibration and shock events such as hard landings. Schleicher explained: “Some mounts are shockfocused, some are vibration-focused and some have dual capability.” For example, the UAV 3001 mount features equal stiffness axially and radially, allowing for versatile placement within the vehicle. It also incorporates a “snubber” for shock protection, ensuring that even if the isolator collapses, the force will be absorbed. Schleicher emphasised that Greene’s mounts often outperform softwarebased vibration mitigation. “It’s a very simple mechanical solution to a problem. It’s cheaper most of the time,” he said, pointing out that wellengineered mounts extend the life of critical components, while software solutions only address part of the problem by mitigating the effects of vibration on a camera image. Taisync showed new versions of its secure UAV datalink radios with pointto-point, point-to-multipoint, mesh and relay capabilities, along with the new ViuRC7 remote controller. The company offers wireless datalink modules supporting ranges of 3-300 km. The most popular, 2.4/5 GHz dual-band module can reach up to 15 km using the 2.4 GHz frequency. Security features of the radios include AES encryption, adaptive frequency hopping and anti-jam capabilities, said Timothy Gu. The anti-jam system operates on the principle of separating the uplink and downlink frequencies in response to electronic attack, such as using 1.4 GHz for downlink and 1.7 GHz for uplink. The frequency is customisable. “A ground jammer can detect the downlink signal and emit a high-power jamming signal on the same frequency. However, the jammer cannot detect the uplink signal because the transmission of the uplink signal from GCS to jammer is a ground-to-ground transmission and the signal strength is attenuated significantly by the Earth,” said Gu. “The jamming signal-over-downlink frequency cannot affect the reception of that downlink signal by the GCS because, again, the transmission of the jamming signal from jammer to GCS is ground to ground.” With the frequency-hopping scheme, both air and ground units hop in response to jamming – to a frequency that is not being jammed – to evade the attack. “For example, the ViuRC7 remote controller operates on 2400 MHz to 2500 MHz and 5200 MHz to 5300 MHz. If the 2400 MHz band is jammed, it will automatically hop to 5200 MHz band,” Gu explained. Taisync plans to release the point-tomultipoint and NDAA-compliant ViuRC7 versions by the end of this year. Trimble Applanix introduced its new PX-1 RTX satellite/inertial navigation board for UAVs. The high-grade MEMS inertial sensor provides support to the positioning system in case the satellite signal is lost briefly, and accurate heading without the interference susceptibility of a magnetometer. Offered as a subscription service, the PX-1 RTX works with Centerpoint RTX, its global ground-station network that sends GNSS corrections to a geostationary satellite for rebroadcast, which the PX1 RTX receives through its GNSS antenna. Therefore, UAS operators do not need to October/November 2024 | Uncrewed Systems Technology A selection of anti-vibration mounts for payloads and subsystems from the Greene Rubber Company
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