Spectral Analysis of Optimal and Suboptimal Gyro Monitoring Filters
- 1 May 1985
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-21 (3) , 372-378
- https://doi.org/10.1109/taes.1985.310567
Abstract
Gyro monitoring filters are used to estimate and correct gyro drift rates of local-level inertial navigation systems. Conventional gyro monitoring filters are usually designed based on a simplified model of gyro drift rate. Furthermore, the effectiveness of these filters-and of many filters of the "Kalman" type-is often measured in terms of the root mean square (rms) criterion in contrast to the spectral content criterion typical of classical Wiener filtering theory. This paper has two objectives: to propose a gyro monitoring filter which is based on a more detailed model of gyro drift rate; and to propose a method of filter performance evaluation which uses as criterion a measure of the spectral content of the error process. The proposed gyro monitoring filter is shown to have improved spectral contents resulting in superior navigation performance for the gyro error models used in the calculations (comparable to commercial-grade aircraft gyros).Keywords
This publication has 4 references indexed in Scilit:
- Information and distortion in reduced-order filter designIEEE Transactions on Information Theory, 1977
- Spectral factorization of a finite-dimensional nonstationary matrix covarianceIEEE Transactions on Automatic Control, 1974
- An algebraic solution to the spectral factorization problemIEEE Transactions on Automatic Control, 1967
- Synthesis of a Very Accurate Inertial Navigation SystemIEEE Transactions on Aerospace and Navigational Electronics, 1965