The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This report presents the results of research on the development of a small-sized, all-latitude GNSS-aided inertial system with compass properties, designed as a tightly-coupled system. In course of research, a breadboard model of the system was created, where the accuracy of determined orientation parameters, including true heading, was observed to improve considerably in the operation mode with the...
Reliable aircraft guidance is one of the main contributors to the high level of safety that is achieved today on modern aircraft. Especially during the landing phase, where aircraft are close to other surrounding traffic and ground obstacles, any undetected deviation from the desired flight path may lead to catastrophic consequences. Automatic landing systems today are based on different ground-based...
There exist some problems in the fiber optic gyro inertial measurement unit(FOG-IMU) calibration, such as dependence on high-precision turntable, low precision, rigorous calibration condition and so on. Aiming at these problems, we propose a high-precision grading calibration method. Firstly, system parameters are calibrated by the discrete calibration method, in which the effects of the lever-arm...
This paper deals with an analysis of the fields used in map-aided navigation. The variability of these fields plays the key role in the performance of map-aiding, thus the choice of an “appropriate” area of the field is prerequisite to accurate navigation. This choice can be made relying on a quantitative characteristic that determines the efficiency of using a geophysical field for navigation. We...
In this paper we describe a recursive filter for the fusion of inertial and visual measurements for self-positioning, where the sensors are attached rigidly to the moving person or object. The system is self-contained, requires no infrastructure and is suitable for both indoor and seamless indoor/outdoor localization. The suggested approach fuses the images acquired by a stereo camera with a 3-axis...
Quantum technology have attracted strong interest in recent years thanks to its extreme sensitivity to inertial forces and its strong immunity to drifts compared to conventional mechanical sensors. This paper introduces cold atom sensors as six-axis inertial sensors from the engineering point of view. In order to highlight the potential of this technology as needed for inertial navigation, a strapdown...
In this paper we present accurate thermo-mechanical simulations of a MEMS gyroscope sensor, with its die-level package. The models, simulation tools, methodology and results are presented. The resonance frequency shifts of the modes of interest (drive and 3 sense modes) and the shift in sense capacitances are simulated and compared to experimental results. Simulations compare well with the results.
Rigid motion computation or estimation is a cornerstone in numerous fields. Attitude computation can be achieved by integrating the angular velocity measured by gyroscopes, the accuracy of which is crucially important for the dead-reckoning inertial navigation. The state-of-the-art attitude algorithms have unexceptionally relied on the simplified differential equation of some kind of kinematic vector,...
To miniature RLG, the path length limit for navigation grade performance is estimated, and dither frequency and amplitude is increased to improve random walk coefficient; dither motor is optimized to obtain minimum size and good vibration performance; a structural, piezoelectric coupled finite element model for path length control (PLC) transducer is established, to increase the compensation ability...
This study reports on a method for parameter estimation of a randomly placed inertial measurement unit (IMU) on an excavator arm. Cost and time can be saved if the sensing equipment is self-calibrating and the mounting position is not a strict requirement. A sensor kit could be mounted on an autonomous construction vehicle — an excavator or front loader, for instance — and calibrate by itself. Automatic...
This paper contains information about the development of a high-accuracy Marine Inertial Reference System named LFK-150. As successor of the LSR85 with dry-tuned gyroscope the LFK-150 with fiber-optic gyroscope should be competitive to costly Laser-Gyros used by several navies around the globe.
SAFRAN COLIBRYS introduce the MS1000 accelerometer, a new class of high performance MEMS accelerometer specially designed for inertial applications. It is based on Colibrys' long experience with MEMS technology and introduces an innovative design solution to meet tactical grade requirements. This paper introduces the MS1000 architecture, reviews in detail the key performances of the product, and presents...
Spatial missions begin with orbit immission of a satellite in parking orbit by means of a satellite launcher. Civitanavi Systems developed an Inertial Navigation Systems (INS), based on proprietary FOG (Fiber Optic Gyro) technology, for stabilization and navigation of a satellite launcher during its mission. Rather than adopting the NED (North East Down) reference frame and a 3-2-1 Euler angles, which...
This paper presents Thales main results for the maturity development activities of TopAxyz MEMS Vibrating Beam Accelerometer (VBA) using a differential resonator architecture implemented on a planar SOI silicon layer. Proof of concept with Navigation grade performances level has already been presented at ISS2012. Development focused on two major challenges: to reach a high production yield and to...
Sensonor has since 2009 produced tactical-grade MEMS-based IMUs and gyro-modules. During this time, approximately 20,000 parts, containing 60,000 MEMS gyros, have been shipped. Prior to this, Sensonor has been the supplier of high-reliable MEMS sensors, including gyros, to demanding safety applications in the automotive industry for more than 20 years. This paper will focus on the MEMS gyros and present...
This paper reports recent progress beyond our initial report [1] in resonator fiber optic gyroscope (RFOG) development towards realization of a next generation compact device for commercial navigation applications by incorporation of silicon optical bench technology to miniaturize resonator and input optics. The resonator fiber optic gyro is being pursued because of its theoretical potential to meet...
The support of rescue forces using Micro Aerial Vehicles (MAVs) is a challenging task which is addressed in this work. In order to fulfill this task an advanced type of MAV is being developed: A quadrotor with tiltable rotors. This vehicle is able to perform vertical takeoff and landing maneuvers as well as to control attitude and velocity independently. To achieve this goal the navigation filter...
An advanced micromachining process has been developed to further enhance the performance and to reduce the size of mass-produced inertial MEMS. In this new platform technology two independent silicon layers instead of one can be used to form more complex 3D-like masses, springs, and free-standing electrodes. The first accelerometer generations for automotive and CE applications are already in series...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.