TDK Introduces High-performance Digital MEMS Accelerometer for Manned and Unmanned Marine Systems

TDK Corporation has extended the Tronics AXO^®300 accelerometers platform with two new products. After the successful production launch in 2020 of the ±14 g AXO315 accelerometer for high-performance navigation and positioning of dynamic systems, Tronics extends the AXO300 accelerometer series with AXO305, a ±5 g accelerometer tailored for navigation, positioning, and motion control of land and marine manned and unmanned systems.

Built with an innovative closed-loop architecture that delivers high linearity and stability even under strong vibrations, the accelerometers from the AXO300 platform feature an excellent one-year composite bias repeatability of 1 mg and composite scale factor repeatability of 600 ppm.

With an input measurement range of ±5 g and vibration rectification error of 20 μg/g², AXO305 is tailored to navigation, positioning and motion control functions of land and marine systems and vehicles.

It demonstrates a Bias Instability of 4 μg with a ±0.5 mg bias over its temperature range, thus enabling precise GNSS-aided navigation of manned and unmanned ground vehicles when integrated into Inertial Navigation System (INS).

AXO305 is a perfect candidate for Motion Reference Units (MRU) used for ship motion control and dynamic positioning, Inertial Measurement Units (IMU) for land navigation, subsea navigation of AUV (Autonomous Underwater Vehicles) and ROV (Remotely Operated Vehicles), platform and crane stabilization as well as precision robotics.

The closed-loop architecture of Tronics AXO300 platform offers high resolution and strong vibration rejection. Accelerometers and inclinometers from the Tronics AXO300 series are housed in a miniature, hermetic, ceramic J-lead package that ensures long operational and storage life and guarantees a high compliancy with the stringent thermal cycling requirements of critical applications. They embed a fully hard-coded electronics with a 24-bit digital SPI interface for a swift integration into stand-alone sensor modules, INS, IMU as well as Attitude and Heading Reference Systems (AHRS). The built-in self-test ensures initial verification of the sensor’s integrity and continuous in-operation functionality test.

Thanks to their common sensor’s architecture, miniature package and low-power consumption, Tronics accelerometers offer a digital, cost-effective and low-SwaP alternative to bulky, expensive, and power-consuming analog solutions like tactical-grade quartz accelerometers. AXO300 accelerometers are ideally complemented by high performance Tronics GYPRO^® digital rate gyros that share the same SMD J-lead ceramic package (12 x 12 x 5 mm) and same digital interface to enable low-cost integration, assembly, and reliability on PCB, even in fast-changing temperature conditions.

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