Identification of the noise structure of micromechanical inertial transducers of motion parameters-Reference-Cited by-同舟云学术

Identification of the noise structure of micromechanical inertial transducers of motion parameters

Published:2019-05-30 Issue:2 Volume:29 Page:69-75
ISSN:2541-870X
Container-title:Radio industry (Russia)
language:
Short-container-title:Radiopromyshlennost

Author:

Lestev A. M.¹,Fedorov M. V.²,Evstafiev S. D.²

Affiliation:

1. Saint-Petersburg State University of Aerospace Instrumentation

2. JSC «GYROOPTICS»

Abstract

The article presents the results of the analysis of the noise structure of micromechanical transducers of motion parameters – micromechanical gyroscopes (MMG) and micromechanical accelerometers (MMA) of an experimental measuring unit of strapdown inertial position navigation systems. The unit is manufactured and developed at JSC «GYROOPTICS» (St. Petersburg). It consists of a LL–MMG triad with measuring ranges of ±400°/s and an axial-type MMA triad with measuring ranges of ± 50 g. Micromechanical gyroscopes and accelerometers manufactured using modern microelectronics technologies are among the most promising microsystem technology devices that are widely used as sensors of the primary information of strapdown inertial orientation and navigation systems. The accuracy of the functioning of the inertial orientation and navigation inertial systems is significantly affected by the noise structure of the output signals of the inertial motion parameters sensors. For this reason, the urgent task of identifying the noise of micromechanical gyroscopes and accelerometers. The noise structure of the angular rate and linear acceleration transducers of the tested SINS block was identified by the Allan variance method. The output signals of the transducers were recorded in normal climatic conditions, the sampling interval was 1.0 ms, and the recording duration was 90 minutes. The processing of the output signals of the transducers was carried out on the basis of special software using the AlaVar 5.2 program. It has been established that the predominant noise components of the transducers are the random walk of the output signal – white noise and the instability of the zero signal – flicker noise. No quantization noise was detected in the output signals of the transducers. The values of the noise characteristics in Allan variance of the output signals of the angular rate transducers and the linear acceleration of the test block are compared with the noise characteristics of the most advanced modules produced by foreign companies.

Publisher

CRI Electronics

Subject

General Earth and Planetary Sciences,General Environmental Science

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