Inertial reference unit

About: Inertial reference unit is a research topic. Over the lifetime, 1306 publications have been published within this topic receiving 22068 citations. The topic is also known as: IRU.

Utilization of a Tactical Grade FOG-Based Inertial Measurement Unit in Real-Time Downhole Surveying

Abstract: Fiber optic gyroscopes (FOG) in an inertial navigation setup have been proposed as an alternative to magnetometer-based downhole surveying The aim of this work is to study the applicability of a tactical-grade FOG-based inertial measurement unit (IMU) as complete surveying sensor for measurement-while-drilling processes downhole Complete navigation solution for downhole applications was tested in laboratory conditions, indicating the usefulness of FOG-based IMUs as possible surveying sensors for directional drilling

MEMS-based devices and systems for orientation, stabilization and navigation

Abstract: The paper deals with the functioning and analysis of the accuracy of various instruments and systems of orientation, stabilization and navigation on micromechanical gyroscopes (MMG) and accelerometers (MMA). Analytical relations for calculation of errors of the commander of commands of the rotating carrier, strapdown verticals, strapdown inertial navigation system (SINS), system of measuring of vertical rolling of the wave buoy are presented.

Inertial velocity sensor signal processing circuit and inertial velocity sensor device provided with the same

Abstract: Inertial velocity sensor signal processing circuits (12, 13, 14) used with an inertial velocity sensor element (11) are provided with first signal processing circuits (12, 13) which operate with a first clock (CLK1), and a second signal processing circuit (14) which operates with a second clock (CLK2) not synchronized with the first clock.

Increasing objects localization precision by determination of inertial sensor calibration constants using differential evolution algorithm

Abstract: This work solves actual problems of inertial navigation systems - increasing of precision. Main part of the paper deals with determination of accelerometers and gyroscopes calibration constants using a differential evolution algorithm. The determination of constants is based on the difference between trajectory recorded by GPS receiver and trajectory calculated from inertial sensor data. Moreover, the cost function, structure of individuals and used control constants values of differential evolution algorithm are described. The results of work are given by graphical comparison of real trajectory from GPS and trajectories calculated from inertial sensor data with optimized and unoptimized calibration constants.

Tactical-grade dual-chip inertial sensor assembly

Abstract: This paper presents a two die assembly of inertial sensors consisting of three (3) orthogonal gyroscopes and three (3) orthogonal accelerometers which demonstrates tactical-grade performance and occupies a total volume of 112 mm3 The sensor mechanisms are identical to existing tactical-grade products while the volume reductions are achieved by combining the sensors into a two-die stack that is wafer-level sealed Noise floors less than 0125 deg/rt-hr for gyroscopes and 01 fps/rt-hr for accelerometer as well as bias stabilities less than 30 deg/hr for the gyroscopes and less than 10 mg for the accelerometers are reported