Sixteen-micromachined-gyroscopes Array Beyond Accuracy Limit By 1.9 Times Without Bandwidth Reduction

How to break through theoretical accuracy limit of √N times based on micromachined-gyroscopes array without bandwidth reduction is currently important challenge. To solve above challenge, a novel expectation cluster interval fusion method based on non-Kalman filter theory is for the first time proposed by dynamically adjusting weighted coefficients of the array samples with high-dispersion characteristics to cluster these samples into special refined interval, which is initially formed based on minimum variance theory representing accuracy limit of the array fusion method. The experimental results show that the accuracy of array-based microgyroscope reaches 0.57× 10^-20/s in this work, which is improved by 1.9 times compared with theoretical accuracy limit value of sixteen-micromachined-gyroscope array of 1.06× 10^-20/s. Further, amplitude of angular rate has no reduction when the bandwidth reaches 50Hz. This work paves a solid path to apply the array-based gyroscope in actual engineering.