Vibration-tolerant MEMS gyroscope positions aircraft
A high stability and vibration-tolerant digital MEMS gyroscope from TDK, the GYPRO 4300 features a ±300 degrees per second input measurement range, together with 200Hz bandwidth and one millisecond latency with a closed-loop architecture.
It is the first product in the company’s Tronics GYPRO4000 digital MEMS gyro family which complements the recently announced AXO300 closed loop digital accelerometers range.
It offers precise navigation and positioning, with bias instability of 0.5 degrees per hour as typical value (two degrees per hour maximum) and an ARW (angular random walk) of 0.1 degrees per square hour. The GYPRO4300 is a miniature, digital and low-SWaP (size, weight and power) high performance MEMS gyro, said TDK, for precise positioning, navigation and stabilisation functions in dynamic applications such as railway, land vehicles, VTOL (vertical take off and landing) aircraft and UAV (unmanned aerial vehicles), marine and sub-sea systems, bore hole drilling and surveying instruments.
The closed loop architecture offers a strong vibration rejection of 0.5 degrees per hour per g² under harsh conditions. The GYPRO4300 gyros are housed in a miniature, hermetic, ceramic J-lead package that ensures long operational and storage life and guarantees a high compliance with the stringent thermal cycling requirements of critical applications.
There is also a 24-bit digital serial peripheral interface (SPI) for a swift integration into inertial navigation systems (INS), inertial measurement units (IMUs) as well as attitude and heading reference systems (AHRS). To minimise mechanical cross-coupling in multi-axis applications, the GYPRO4300 is available in three frequency ranges.
Suitable applications for the miniature, low power consumption, the Tronics GYPRO4300 gyro is an cost-effective and low-SWaP alternative to bulky, expensive, and power-consuming solutions like dynamically tuned gyroscopes (DTGs) and fibre optical gyroscopes (FOGs). The solid-state architecture also reduces the number of internal components and system complexity required. As a result, the GYPRO4300 demonstrates a MTBF (mean time between failure) higher than 1,000,000 hours, more than 10 times better than incumbent DTGs and FOGs with similar performances, said TDK. The built-in self-test ensures both an initial verification of the sensor’s integrity and a continuous in-operation functionality test, advised TDK.
