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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.
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 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...
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...
In 2015, InnaLabs reported on the development of a range of specialist, precision Quartz Pendulous Accelerometers. The performance requirement for these accelerometers was a key design driver for meeting the market needs within the tactical and the navigation grade market segments. In order to extend InnaLabs offering to cutting edge, volume applications with more stringent and highly dynamic environments...
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...
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...
Based on recent experiences developing very low noise fiber-optic gyroscopes (FOG), as presented at ISS-2016, first performance results on very large optical fiber coils of up to 1 m diameter are presented. The goal for constructing large FOGs is to evaluate experimentally the physical limits of this kind of technology and to reach the lowest possible noise. While these experiments are probing the...
Thermal analysis for the single-axis fiber optic gyroscope is carried out, and the influence of the fiber-loop temperature field on gyro output is researched. In this paper, Fiber optic gyroscope model and fiber loop model are established and validated, then the temperature field of the gyroscope and fiber loop are simulated and analyzed. By comparing temperature nephograms of the fiber loop and the...
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,...
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...
To drive higher performance and smaller sized fiber optic gyroscope (FOG) coils smaller diameter optical fibers are required to allow more fiber to be used within these coils and/or to reduce the coil diameter. The reduction in fiber size and increase in FOG coil layers reduces the polarization extinction ratio (PER) capabilities of the optical fiber. To address this a new FOG polarization maintaining...
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.
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...
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