A set of high accuracy low cost metallic resonator CVG

A set of all-digital metallic cylindrical CVGs of different diameters are presented in this paper. Innalabs CVG43 with resonator diameter of 43 mm, having natural frequency in the range 3 kHz and made of low damping and temperature stable material, is placed under vacuum cap with residual pressure of about 5 times 10^-4 arm. The resonator Q factors reach values of 20000 - 30000 depending on resonator design and material used. CVG43 bias instability is about 0.03 deg/hr at stable temperature and about 0.5 deg/hr through its full temperature range (using temperature ramp of 1degC/min). Innalabs CVG25, which uses a 25 mm resonator diameter, has a bias instability of about 0.15-0.5 deg/hr, and a natural frequency approaching 6 kHz; is presented in Allan variance graphs at constant temperature and throughout its operating temperature range. Innalabs CVG17 gyro based on 17 mm resonator diameter has a bias instability of about 2.5 deg/hr and can survive many thousands of g´s shock. This gyro is presented in Allan variance graphs and photos. This gyro sensor weighs about 20 grams and is ideal for unmanned aerial and underwater vehicle applications. Gyro accuracy through a wide temperature range is discussed and test results are presented. Three-axis units based on all types of these gyros are presented, as well. Future opportunities of each of these gyros are discussed.