Relevant bibliographies by topics / Gyroscopes

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Gyroscopes'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Gyroscopes"

1

Usubamatov, Ryspek. "Physics of Gyroscope’s “Antigravity Effect”." Advances in Mathematical Physics 2019 (December 20, 2019): 1–7. http://dx.doi.org/10.1155/2019/4197863.

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The physics of gyroscopic effects are more complex than presented in existing mathematical models. The effects presented by these models do not match the real forces acting on gyroscopic devices. New research in this area has demonstrated that a system of inertial torques, which are generated by the rotating mass of spinning objects, acts upon a gyroscope. The actions of the system of inertial forces are validated by practical tests of the motions of a gyroscope with one side support. The action of external load torque on a gyroscope with one side support demonstrates that the gyroscope’s upward motion is wrongly called an “antigravity” effect. The upward motion of a gyroscope is the result of precession torque around its horizontal axis. The novelty of the present work is related to the mathematical models for the upward and downward motions of gyroscopes influenced by external torque around the vertical axis. This analytical research describes the physics of gyroscopes’ upward motion and validates that gyroscopes do not possess an antigravity property.
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Kudelin, Igor, Srikanth Sugavanam, and Maria Chernysheva. "Rotation Active Sensors Based on Ultrafast Fibre Lasers." Sensors 21, no. 10 (May 19, 2021): 3530. http://dx.doi.org/10.3390/s21103530.

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Gyroscopes merit an undeniable role in inertial navigation systems, geodesy and seismology. By employing the optical Sagnac effect, ring laser gyroscopes provide exceptionally accurate measurements of even ultraslow angular velocity with a resolution up to 10−11 rad/s. With the recent advancement of ultrafast fibre lasers and, particularly, enabling effective bidirectional generation, their applications have been expanded to the areas of dual-comb spectroscopy and gyroscopy. Exceptional compactness, maintenance-free operation and rather low cost make ultrafast fibre lasers attractive for sensing applications. Remarkably, laser gyroscope operation in the ultrashort pulse generation regime presents a promising approach for eliminating sensing limitations caused by the synchronisation of counter-propagating channels, the most critical of which is frequency lock-in. In this work, we overview the fundamentals of gyroscopic sensing and ultrafast fibre lasers to bridge the gap between tools development and their real-world applications. This article provides a historical outline, highlights the most recent advancements and discusses perspectives for the expanding field of ultrafast fibre laser gyroscopes. We acknowledge the bottlenecks and deficiencies of the presented ultrafast laser gyroscope concepts due to intrinsic physical effects or currently available measurement methodology. Finally, the current work outlines solutions for further ultrafast laser technology development to translate to future commercial gyroscopes.
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Bai, Bing, Cun Li, and Yulong Zhao. "Development of V-Shaped Beam on the Shock Resistance and Driving Frequency of Micro Quartz Tuning Forks Resonant Gyroscope." Micromachines 11, no. 11 (November 17, 2020): 1012. http://dx.doi.org/10.3390/mi11111012.

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The application of gyroscopes in harsh environments has always been a hot topic. As a high-quality material for manufacturing gyroscopes, quartz crystals need to be designed and optimized to meet the normal operation of gyroscopes in harsh environments. The Micro Electronics Mechanical System(MEMS) quartz tuning forks resonant gyroscope is one of the quartz gyroscopes. The elastic structure (V-shaped beam) between the anchor support point and tuning forks plays a vital role in the MEMS quartz tuning forks resonant gyroscope. This structure determines the natural frequency of the gyroscope, and more importantly, determines the shock resistance of the gyroscope structure. In this article, the MEMS quartz tuning forks gyroscope with different V-shaped beam thicknesses are simulated and analyzed by finite element analysis simulation software. After the modal analysis and shock simulation (the half-cycle sine shock pulse with amplitude of 1500 g (g is the acceleration of gravity) and duration of 2 ms in the six shock directions), the results show that when the beam thickness is 80 μm, the maximum stress is 94.721 MPa, which is less than the failure stress of quartz crystal. The gyroscope’s shock resistance is verified through shock testing.
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Sinel’nikov, A. O., A. A. Medvedev, Yu D. Golyaev, M. E. Grushin, and D. I. Chekalov. "Thermal Zero Drifts in Magneto-Optical Zeeman Laser Gyroscopes." Giroskopiya i Navigatsiya 29, no. 4 (2021): 46–55. http://dx.doi.org/10.17285/0869-7035.0079.

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The paper is devoted to the current problem of gyroscopy in general and its magneto-optical laser branch in particular: further increase in the accuracy of gyroscopes while maintaining their stable operation in real operating conditions. The problem is considered and studied by the example of the magneto-optical Zeeman laser gyroscope, which is one of the effective types of laser gyroscope. The development and improvement of the technolo-gy for creating this type of gyroscopes makes it possible to significantly re-duce the sources of the gyroscope zero drift and yet, retain the other properties and performance parameters. The study and validation of the possibility of a significant reduction in the gyroscope key control currents, such as the pumping currents of the active medium and the control currents of frequency bias, will increase the measuring accuracy of the gyroscope, and, accordingly, the accuracy of navigation systems based on them.
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Chikovani, Valerii, and Serhii Golovach. "The state and prospects of the development of vibration gyroscopy in Ukraine and in the world." MECHANICS OF GYROSCOPIC SYSTEMS, no. 41 (December 28, 2022): 61–87. http://dx.doi.org/10.20535/0203-3771412021269245.

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The work analyzes the development and current state of vibration gyroscopes in Ukraine and in the world. The development of quartz and metallic resonators of various diameters for vibrating gyroscopes is presented and analyzed. In addition, for comparison with world practice, the developments of quartz and metallic resonators of advanced foreign companies, leaders in this field, are given. The block diagrams of the standing wave control system of the vibrating gyroscope in three modes of operation: as the angle rate sensor, as the rate-integrating or whole angle mode sensor and the differential mode are considered. In the perspective, the possibility of combining all three modes in one gyroscope with automatic switching from one mode to another one is shown, for maximum use of the advantages of each mode in dependence of environmental conditions and motion parameters. The test results of gyroscope with a metallic resonator made in Ukraine, on the effect of a wide range of external disturbances are presented. The development prospects of vibrating gyroscopes and systems based on them are evaluated. The paper draws conclusions about the state and prospects for the development of vibrating gyroscopy in Ukraine.
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Xu, Yingyu, Jing Lin, Chunhua He, Heng Wu, Qinwen Huang, and Guizhen Yan. "Design of a Shock-Protected Structure for MEMS Gyroscopes over a Full Temperature Range." Micromachines 15, no. 2 (January 30, 2024): 206. http://dx.doi.org/10.3390/mi15020206.

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Impact is the most important factor affecting the reliability of Micro-Electro-Mechanical System (MEMS) gyroscopes, therefore corresponding reliability design is very essential. This paper proposes a shock-protected structure (SPS) capable of withstanding a full temperature range from −40 °C to 80 °C to enhance the shock resistance of MEMS gyroscopes. Firstly, the shock transfer functions of the gyroscope and the SPS are derived using Single Degree-of-Freedom and Two Degree-of-Freedom models. The U-folded beam stiffness and maximum positive stress are deduced to evaluate the shock resistance of the silicon beam. Subsequently, the frequency responses of acceleration of the gyroscope and the SPS are simulated and analyzed in Matlab utilizing the theoretical models. Simulation results demonstrate that when the first-order natural frequency of the SPS is approximately one-fourth of the gyroscope’s resonant frequency, the impact protection effect is best, and the SPS does not affect the original performance of the gyroscope. The acceleration peak of the MEMS gyroscope is reduced by approximately 23.5 dB when equipped with the SPS in comparison to its counterpart without the SPS. The anti-shock capability of the gyroscope with the SPS is enhanced by approximately 13 times over the full-temperature range. After the shock tests under the worst case, the gyroscope without the SPS experiences a beam fracture failure, while the performance of the gyroscope with the SPS remains normal, validating the effectiveness of the SPS in improving the shock reliability of MEMS gyroscopes.
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Ünker, F., and O. Çuvalcı. "Optimum Tuning of a Gyroscopic Vibration Absorber Using Coupled Gyroscopes for Vibration Control of a Vertical Cantilever Beam." Shock and Vibration 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1496727.

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This paper deals with the investigation of optimum values of the stiffness and damping which connect two gyroscopic systems formed by two rotors mounted in gimbal assuming negligible masses for the spring, damper, and gimbal support. These coupled gyroscopes use two gyroscopic flywheels, spinning in opposing directions to have reverse precessions to eliminate the forces due to the torque existing in the torsional spring and the damper between gyroscopes. The system is mounted on a vertical cantilever with the purpose of studying the horizontal and vertical vibrations. The equation of motion of the compound system (gyro-beam system) is introduced and solved to find the response measured on the primary system. This is fundamental to design, in some way, the dynamic absorber or neutralizer. On the other hand, the effect of the angular velocities of the gyroscopes are studied, and it is shown that the angular velocity (spin velocity) of a gyroscope has a significant effect on the behavior of the dynamic motion. Correctness of the analytical results is verified by numerical simulations. The comparison with the results from the derivation of the corresponding frequency equations shows that the optimized stiffness and damping values are very accurate.
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Šklíba, Jan, and Jan Škoda. "About Dynamics Problems of the Vibroisolation System with the Gyroscopic Stabilizer." Solid State Phenomena 164 (June 2010): 116–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.116.

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The fundamental condition of the sufficient vibration-isolation is that all natural frequencies of a system are placed outside the interval of exciting frequencies. By the application of a gyroscopic stabilizer depend some natural frequencies on the gyroscope impulse moment. There is described how to reach the fundamental condition by the help of sufficient magnitude of gyroscopes impulse moment.
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Yuan, Zhenkun, Jian Chen, Dingbo Chen, Shuolong Zhu, Junbo Yang, and Zhenrong Zhang. "An Ultra-Low-Loss Waveguide Based on BIC Used for an On-Chip Integrated Optical Gyroscope." Photonics 10, no. 4 (April 14, 2023): 453. http://dx.doi.org/10.3390/photonics10040453.

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The development of integrated optical technology and the continuous emergence of various low-loss optical waveguide materials have promoted the development of low-cost, size, weight, and power optical gyroscopes. However, the losses in conventional optical waveguide materials are much greater than those in optical fibers, and different waveguide materials often require completely different etching processes, resulting in severely limited gyroscope performance, which is not conducive to the monolithic integration of gyroscope systems. In this paper, an ultra-low-loss Archimedean spiral waveguide structure is designed for an on-chip integrated optical gyroscope by using the high Q value and low-loss optical characteristics of the bound state in the continuum (BIC). The structure does not require the etching of high-refractive-index optical functional materials, avoiding the etching problem that has been difficult to solve for a long time. In addition, the optical properties of the BIC straight and the BIC bent waveguide are simulated using the finite element method (FEM) to find the waveguide structural parameters corresponding to the BIC mode, which is used to design the integrated sensing coil and analyze the gyroscope performance. The simulation results show that the gyroscope’s sensitivity can reach 0.6699°/s. This research is the first time a BIC optical waveguide has been used for an integrated optical gyroscope, providing a novel idea for the monolithic integration of optical gyroscopes.
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Chikovani, Valerii, Sergii Ponomarenko, Sergiy Golovach, and Pavlo Pishchela. "Mutual calibration of the zero offset of two coaxial gyroscopes in motion." MECHANICS OF GYROSCOPIC SYSTEMS, no. 47 (May 15, 2024): 45–55. http://dx.doi.org/10.20535/0203-3771472024307712.

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The paper considers a method for systematic component correction of two coaxial gyroscope biases in motion under the most general assumptions about their models. This method allows combining heterogeneous MEMS and non-MEMS or optical gyroscopes into a single unit. The algorithm that implements this method requires initial calibration at the stop, for example, based on external information. Further, the algorithm uses the combined processing of data from the redundant sensors to provide more accurate angular rate of the so-called “virtual” gyroscope. The accuracy of the “virtual” gyroscope significantly exceeds the usual average value of these gyroscopes’ data. An application of the correction method to the measurement results of two coaxial metallic resonators' vibratory gyroscopes is given.
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Dissertations / Theses on the topic "Gyroscopes"

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Azgin, Kivanc. "High Performance Mems Gyroscopes." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608194/index.pdf.

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This thesis reports development of three different high performance, low g-sensitive micromachined gyroscopes having single, double, and quadruple masses. The single mass gyroscope (SMG) is developed for comparison of its performance with the double mass gyroscope (DMG) and quadruple mass gyroscope (QMG). DMG is a tuning fork gyroscope, diminishing the effects of unpredictable g-loadings during regular operation, while QMG is a twin tuning fork gyroscope, developed for a uniform and minimized g-sensitivity. DMG and QMG use novel ring spring connections for merging the masses in drive modes, providing uniform and anti-phase drive mode vibrations that minimize the cross-coupling and the effects of intrinsic and extrinsic accelerations on the scale factor and bias levels of the gyroscopes. The sense mode of each mass of the multi-mass gyroscopes is designed to have higher resonance frequencies than that of the drive mode for possible matching requirements, and these sense modes have dedicated frequency tuning electrodes for frequency matching or tuning. Detailed performance simulations are performed with a very sophisticated computer model using the ARCHITECT software. These gyroscopes are fabricated using a standard SOIMUMPs process of MEMSCAP Inc., which provides capacitive gaps of 2 µ
m and structural layer thickness of 25 µ
m. Die sizes of the fabricated gyroscope chips are 4.1 mm x 4.1 mm for the single mass, 4.1 mm x 8.9 mm for the double mass, and 8.9 mm x 8.9 mm for the quadruple mass gyroscope. Fabricated gyroscopes are tested with dedicated differential readout electronics constructed with discrete components. Drive mode resonance frequencies of these gyroscopes are in a range of 3.4 kHz to 5.1 kHz. Depending on the drive mode mechanics, the drive mode quality (Q) factors of the fabricated gyroscopes are about 300 at atmospheric pressure and reaches to a value of 2500 at a vacuum ambient of 50 mTorr. Resolvable rates of the fabricated gyroscopes at atmospheric pressure are measured to be 0.109 deg/sec, 0.055 deg/sec, and 1.80 deg/sec for SMG, DMG, and QMG, respectively. At vacuum, the respective resolutions of these gyroscopes improve significantly, reaching to 106 deg/hr with the SMG and 780 deg/hr with the QMG, even though discrete readout electronics are used. Acceleration sensitivity measurements at atmosphere reveal that QMG has the lowest bias g-sensitivity and the scale factor g sensitivity of 1.02deg/sec/g and 1.59(mV/(deg/sec))/g, respectively. The performance levels of these multi-mass gyroscopes can be even further improved with high performance integrated capacitive readout electronics and precise sense mode phase matching.
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Johnson, Brian. "The electronic control of gyroscopes." Thesis, University of Bath, 1985. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767553.

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The work reported in this thesis describes the design and implementation of three electronic controllers for a miniature two axis gyroscope. In particular the design is based upon the Microflex Gyroscope, which is manufactured by British Aerospace. Two variants of the Microflex gyroscope have been considered; the combined pickoff and torquer gyroscope and the separate pickoff and torquer gyroscope. These two gyroscopes are mechanically identical but feature different pickoff and torquer arrangements. The thesis traces the history of the gyroscope from its origins to the development of small two axis rate sensors. It includes a detailed description of the Microflex gyroscope and develops mathematical models to describe its behaviour. The electronic controllers are used to sense the angular displacement of the gyroscope, condition these signals then apply them as feedback to the gyroscope to null the displacement. The control is applied in the form of a type II servo system, hence the output from the system is a measure of the angular rate which is applied to the gyroscope. The design of an analogue controller is developed for the combined pickoff and torquer gyroscope. The restrictions of the design of the controller due to this transducer configuration are identified. To overcome these restrictions and to increase the design options an analogue controller for the separate pickoff and torquer gyroscope was developed and implemented. This work lead into the design and implementation of a digital controller. The advantages of this design over a traditional analogue system are discussed. Both modelled and practical results for all three systems are presented in the thesis. These show that design objectives can be achieved using simple design rules which have been developed as the designs progressed.
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Zarinetchi, Farhad. "Studies in optical resonator gyroscopes." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13227.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
Includes bibliographical references (leaves 193-194).
by Farhad Zarinetchi.
Ph.D.
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4

Shao, Peng. "Microscale hemispherical shell resonating gyroscopes." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54266.

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MEMS gyroscopes are electromechanical devices that measure rate or angle of rotation. They are one of the fastest growing segments of the microsensor market. Advances in microfabrication technologies have enabled the implementation of chip scale monolithic gyroscopes (MEMS gyroscopes) with very small form factor that are lightweight and consume little power. Over the past decade, significant amount of research have been directed towards the development of high performance and very small size MEMS gyroscopes for applications in consumer electronics such as smart phones. In this dissertation, high aspect-ratio hemispherical shell structure with continuously curved surface is utilized as the high Q resonator. Being an axial symmetric structure, the 3D hemispherical shell is able to achieve low frequency (3 ~ 5 kHz) within 2 mm X 2mm die area. Detailed analysis on energy dissipation also shows its potential to achieve ultra-high quality factor with the selection of high Q material and proper design of support structure. This dissertation presents, for the first time, the analysis, design, fabrication and characterization of a micro-hemispherical resonating gyroscope (μHRG) that has the potential to be used as a whole angle micro-gyroscope. A three-dimensional high aspect-ratio poly- and single crystalline silicon (3D HARPSS) process is developed to fabricate free-standing, stem-supported hemispherical shell with self-aligned deep electrodes for driving, sensing and quadrature control of the gyroscope. This monolithic process consists of seven lithography steps and combines 3D micro-structure with curved surfaces with the HARPSS process to create capacitive electrodes with arbitrary gaps around the micro-hemispherical shell resonator (μHSR). Polysilicon is utilized as the structural material due to its isotropic mechanical properties and the potential of achieving high quality factor. The fabrication is demonstrated successfully by prototypes of polysilicon μHRG with diameter of 1.2 mm and thickness of 700 nm. Frequency response and gyro operation are electronically measured using the integrated electrodes. Quality factor of 8,500 is measured with frequency mismatch of 105 Hz. Electronic mode matching and alignment are successfully performed by applying tuning voltages and quadrature nulling voltages. An open loop rate sensitivity scale factor of 4.42 mV/°/s was measured. Design and process optimization of the support structure improved the quality factor to 40,000. Further improvement of quality factor will enable the demonstration of high performance RIG using polysilicon μHRG.
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Gow, Joel A. "Testing the HG1700 inertial measurement unit for implementation into the AIRES unmanned underwater vehicle." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FGow.pdf.

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Thesis (M.S. in Applied Science (Physical Oceanography))--Naval Postgraduate School, June 2005.
Thesis Advisor(s): Anthony J. Healey, Edward B. Thornton. Includes bibliographical references (p. 49). Also available online.
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Rabeendran, Nishanthan. "A Study of Ring Laser Gyroscopes." Thesis, University of Canterbury. Physics and Astronomy, 2008. http://hdl.handle.net/10092/1989.

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This thesis presents a study of a 1.6 metre square, helium-neon based ring laser gyroscope (denoted PR-1). This device is mounted on one of the internal walls of a high rise building. After optimisation a cavity Q of 2.9x10¹¹ and a sensitivity to rotation of approximately 10⁻³ of the background Earth bias was obtained. A detailed investigation of the single mode operating regime and multi-mode thresholds was undertaken and could be well accounted for with a simple model of the gain curves. A key feature of the operation of PR-1 is persistent longitudinal mode hopping. It is shown that by running the laser at selective high powers, one obtains CW mode locked operation thereby negating the influence of mode hopping and allowing for long time data acquisition. PR-1 was used to demonstrate oscillation of the Rutherford building on its second fundamental mode during an earthquake. In a separate investigation, a range of supermirrors were studied to determine the optimum configuration in a 4 by 4 metre ring laser. The set with the highest finesse prevailed despite the comparatively low light levels on the photo detectors. The geometric stability of the lasers was not found to be a significant factor.
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Sharma, Mrigank. "Design and modeling of advanced gyroscopes." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1889.

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This thesis reports on a design and modeling of a micro-machined gyroscope. The proposed sensor is a dual mass type, electro-statically driven to primary mode oscillation and senses, capacitively, the output signal. Full decoupling between drive and sense modes minimizes the mechanical crosstalk and based on this a novel gyroscope is designed and modeled which has separate sensing and driving masses. The dual mass gyroscope is designed such that driving and sensing resonant frequency is 23101 Hz with 0% mismatch (in simulation)with quality factor of 31.6227 and bandwidth of 730.51Hz. The gyroscope when actuated in simulation with 25V ac and 10V dc showed sensing capacitance variation of 126aF for 1 rad/s with base capacitance of 244.16fF. To the design of the gyroscope a new semi automatic tool was formulated for the noise analysis and noise based optimization of the resonant MEMS structures. Design of a sensitive gyroscope needs to take into account the noise shaping induced by damping phenomena at micro scale and is critical for optimization. The analysis was further extended to the design of the gyroscope and estimation shows that there is a trade of between the S/N ratio and the sensitivity and the design could be made much better in-terms of S/N by tuning its resonant frequency to 10⁶Hz.
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Sung, Wang-Kyung. "High-frequency tri-axial resonant gyroscopes." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52936.

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This dissertation reports on the design and implementation of a high-frequency, tri-axial capacitive resonant gyroscopes integrated on a single chip. The components that construct tri-axial rotation sensing consist of a yaw, a pitch and a roll device. The yaw-rate gyroscope has a wide bandwidth and a large full-scale range, and operates at a mode-matched condition with DC polarization voltage of 10V without frequency tuning requirement. The large bandwidth of 3kHz and expected full-scale range over 30,000˚/sec make the device exhibit fast rate response for rapid motion sensing application. For the pitch-and-roll rate sensing, an in-plane drive-mode and two orthogonal out-of-plane sense-modes are employed. The rotation-rate sensing from lateral axes is performed by mode-matching the in-plane drive-mode with out-of-plane sense-modes to detect Coriolis-force induced deflection of the resonant mass. To compensate process variations and thickness deviations in the employed silicon-on-insulator (SOI) substrates, large electrostatic frequency tunings of both the drive and sense modes are realized. A revised high aspect ratio combined polysilicon and silicon (HARPSS) process is developed to resolve the Coriolis response that exists toward out-of-plane direction while drive-mode exists on in-plane, and tune individual frequencies with minimal interference to unintended modes. To conclude and overcome the performance limitation, design optimization of high-frequency tri-axial gyroscopes is suggested. Q-factor enhancement through reduction of thermoelastic damping (TED) and optimizations of physical dimensions are suggested for the yaw disk gyroscope. For the pitch-and-roll gyroscope, scaling property of physical dimension and its subsequent performance enhancement are analyzed.
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Patil, Nishad. "Design And Analysis Of MEMS Angular Rate Sensors." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/291.

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Design and analysis of polysilicon and single crystal silicon gyroscopes have been carried out. Variations in suspension design have been explored. Designs that utilize in-plane and out-of-plane sensing are studied. Damping plays an important role in determining the sense response. Reduction in damping directly affects sensor performance. The various damping mechanisms that are prevalent in gyroscopes are studied. Perforations on the proof mass are observed to significantly reduce the damping in the device when operated in air. The effects of perforation geometry and density have been analyzed. The analysis results show that there is a two orders of magnitude reduction in damping of thick gyroscope structures with optimized perforation design. Equivalent circuit lumped parameter models have been developed to analyze gyroscope performance. The simulation results of these models have been compared with results obtained from SABER, a MEMS specific system level design tool from Coventor-ware. The lumped parameter models are observed to produce faster simulation results with an accuracy comparable to that of Coventorware Three gyroscopes specific to the PolyMUMPS fabrication process have been designed and their performance analyzed. Two of the designs sense motion out-of-plane and the other senses motion in-plane. Results of the simulation show that for a given damping, the gyro design with in-plane modes gives a resolution of 4◦/s. The out-of-plane gyroscopes have two variations in suspension. The hammock suspension resolves a rate of 25◦/s in a 200 Hz bandwidth while the design with folded beam suspension resolves a rate of 2◦/s in a 12 Hz bandwidth. A single crystal silicon in-plane gyroscope has been designed with vertical electrodes to sense Coriolis motion. This design gives an order of magnitude higher capacitance change for a given rotation in comparison to conventional comb-finger design. The effects of process induced residual stress on the characteristic frequencies of the polysilicon gyroscopes are also studied. The in-plane gyroscope is found to be robust to stress variations. Analysis results indicate that the tuning fork gyroscope with the hammock suspension is the most susceptible to compressive residual stress, with a significant drop in sensitivity at high stress values.
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Steward, Victoria. "Modeling of a folded spring supporting MEMS gyroscope." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-1007103-133256/.

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Books on the topic "Gyroscopes"

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Chopra, Kamal Nain. Optoelectronic Gyroscopes. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8380-3.

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Technology, Symposium Gyro. Symposium Gyro Technology 1994: Stuttgart, Germany, September 20/21, 1994. Stuttgart: Universität Stuttgart, Institut A für Mechanik, 1994.

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Symposium Gyro Technology (1992 Stuttgart, Germany). Symposium Gyro Technology 1992: Stuttgart, Germany, September 22/23, 1992. Edited by Sorg H, Universität Stuttgart. Institut A für Mechanik., and Deutsche Gesellschaft für Ortung und Navigation. Stuttgart: Universität Stuttgart, Institut A. für Mechanik, Deutsche Gesellschaft für Ortung und Navigation, 1991.

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Symposium Gyro Technology (1995 Stuttgart, Germany). Symposium Gyro Technology 1995: Stuttgart, Germany, September 19/20, 1995. Edited by Sorg H, Universität Stuttgart. Institut A für Mechanik., and Deutsche Gesellschaft für Ortung und Navigation. Stuttgart: Universität Stuttgart, Institut A. für Mechanik, Deutsche Gesellschaft für Ortung und Navigation, 1995.

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Symposium Gyro Technology (1991 Stuttgart, Germany). Symposium Gyro Technology, 1991: Stuttgart, Germany, September 22/25, 1991. Edited by Sorg H, Universität Stuttgart. Institut A für Mechanik., and Deutsche Gesellschaft für Ortung und Navigation. Stuttgart: Universität Stuttgart, Institut A. für Mechanik, Deutsche Gesellschaft für Ortung und Navigation, 1992.

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Symposium Gyro Technology (1996 Stuttgart, Germany). Symposium Gyro Technology 1996: Stuttgart, Germany, September 17/18, 1996. Edited by Sorg H and Universität Stuttgart. Institut A für Mechanik. Stuttgart: Universität Stuttgart, Institut A für Mechanik, 1996.

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Apostolyuk, Vladislav. Coriolis Vibratory Gyroscopes. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22198-4.

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Acar, Cenk, and Andrei Shkel. MEMS Vibratory Gyroscopes. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-09536-3.

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Rakhteenko, E. R. Giroskopicheskie sistemy orientat͡s︡ii. Moskva: "Mashinostroenie", 1989.

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Pavlov, V. A. Giroskopicheskiĭ ėffekt, ego proi͡a︡vlenii͡a︡ i ispolʹzovanie. 5th ed. Leningrad: "Sudostroenie", 1985.

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Book chapters on the topic "Gyroscopes"

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Trusov, Alexander A. "Gyroscopes." In Encyclopedia of Nanotechnology, 1427–40. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-9780-1_324.

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Billingsley, John. "Gyroscopes." In Essentials of Dynamics and Vibrations, 69–73. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56517-0_7.

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Yang, Yuehai, Wenzhi Li, Elmar Kroner, Eduard Arzt, Bharat Bhushan, Laila Benameur, Liu Wei, et al. "Gyroscopes." In Encyclopedia of Nanotechnology, 1008–20. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_324.

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Silvano, Donati. "Gyroscopes." In Photonic Instrumentation, 301–66. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003391357-8.

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Chopra, Kamal Nain. "Ring Laser Gyroscopes." In Optoelectronic Gyroscopes, 1–30. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_1.

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Chopra, Kamal Nain. "Fiber-Optical Gyroscopes." In Optoelectronic Gyroscopes, 31–59. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_2.

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Chopra, Kamal Nain. "Minimization of Scattering Loss of Dielectric Mirrors." In Optoelectronic Gyroscopes, 61–68. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_3.

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Chopra, Kamal Nain. "Improvement in the Laser-Induced Damage Threshold by the Dual Ion Beam Sputtering Technology." In Optoelectronic Gyroscopes, 69–79. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_4.

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Chopra, Kamal Nain. "Optical Testing of Optical Elements." In Optoelectronic Gyroscopes, 81–101. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_5.

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Chopra, Kamal Nain. "Characterization Techniques for Optical Thin Films." In Optoelectronic Gyroscopes, 103–30. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8380-3_6.

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Conference papers on the topic "Gyroscopes"

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Ansari, Masoud, Ebrahim Esmailzadeh, and Nader Jalili. "On Coupled Flexural and Torsional Oscillations of a Vibrating Beam Gyroscopic System." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2630.

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Gyroscopes are commonly used to measure the angle of rotation and its rate of change in several critical systems like airplanes. Therefore, there is a never-ending desire for researchers to increase measurement precision of these devices. In order to achieve this goal, some new gyroscopes have been invented recently. Especially, advent of micro manufacturing has appeared some sophisticated to more pre´cised gyroscopic systems. The widely-used gyroscopes are vibrating beam gyroscopes; however they face a very important drawback, called cross-coupling error. In presence of the secondary base rotations, significant errors will be produced in measurement of the gyroscope output. In order to deal with this issue, this paper addresses a novel gyroscopic system, called rocking-mass gyroscope. It is consist of four beams attached to a rigid substrate, undergoing coupled flexural and torsional vibrations with a finite mass attached in the middle. This configuration is such that, it does not encounter the same problems as vibrating beam gyroscopes. This configuration makes the vibration analysis very complicated. Despite this fact, a thorough analysis is performed in this paper. Using Extended Hamilton’s principle, eight governing partial differential equations of motion along with their corresponding boundary conditions are derived. Further attempt is made to find the closed-form frequency equation of the system. Solving this equation needs high computational costs and gives the natural frequencies of the system. In spite of this fact, the system is analysed in the frequency domain using an exact method in full detail, for two cases of fixed and rotating base support. Furthermore, a detailed parameter sensitivity analysis is carried out to determine the effects of different parameters on the natural frequencies of the system. The contributions of this research are very important from two viewpoints. Firstly, determination of natural frequencies and resonance conditions are essential for design of the system, and design of appropriate control strategies. Secondly, frequency domain analysis forms the basis of time domain analysis, followed by exact mode superposition method.
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Patel, Chandradip, and Patrick McCluskey. "Combined Temperature and Humidity Effects on MEMS Vibratory Gyroscope Sensor." In ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/ipack2011-52183.

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Reliability and long term stability are the greatest challenges for commercialization of MEMS gyroscopes. Their vast use in different applications that required MEMS gyroscopes to function from medium to harsh environments make necessary to evaluate the performance of MEMS gyroscope under those conditions. This paper focuses on the combined long term effects of temperature and humidity on the performance of MEMS vibratory gyroscope. Performance of the MEMS gyroscope was evaluated over time by conducting temperature humidity bias (THB) test on a COTS (commercial off-the-shelf) single axis MEMS vibratory gyroscope having an operating temperature range from −40°C to +85°C. The gyroscope sensors were exposed to 60°C and 90%RH (Relative Humidity) for 500 hours. Six single axis gyroscopes were tested, three with in-situ device calibration and three without in-situ device calibration. Out of three MEMS vibratory gyroscopes tested without in-situ device calibration, it was observed that samples had minimum and maximum in-situ zero rate output (ZRO) drift of 1.3°/s and 2.2°/s respectively over 500 hours. These drifts were disappeared when gyroscope sensors were tested after six months by keeping at room condition. Other three single axis gyroscopes were tested in the same chamber with in-situ device calibration which didn’t show any major performance ZRO drift.
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Hao, Zhili, and Farrokh Ayazi. "Thermoelastic Damping in Flexural-Mode Ring Gyroscopes." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79965.

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This paper provides a comprehensive derivation for thermoelastic damping (TED) in flexural-mode ring gyroscopes, in light of recent efforts to design high rate-resolution gyroscopes. Imposing an upper limit on the attainable mechanical noise floor of a vibratory gyroscope, thermoelastic damping in a ring gyroscope is extracted from the equations of linear thermoelasticity. By assuming that it is small and therefore has negligible effect on the flexural-mode vibrations in a ring, thermoelastic damping manifests itself through temporal attenuation, where a complex frequency is used to quantitatively evaluate this damping. The exact solution to thermoelastic damping is derived and verified with experimental data in the literature. This work not only provides significant insight to the geometrical design in high-Q ring gyroscopes, but also defines their performance limit.
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Cui, Wei, Xiaolin Chen, and Wei Xue. "Robust Compensator Control of a Non-Resonant MEMS Gyroscope With Linear Quadratic Regulator." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38871.

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This paper presents a controller design for a four degrees-of-freedom (4-DOF) non-resonant gyroscope via the linear quadratic regulator (LQR) technique. Compared to conventional MEMS gyroscopes, non-resonant gyroscopes are less vulnerable to fabrication perturbations. However, closed-loop performance of non-resonant gyroscopes has not been investigated previously. The control of non-resonant gyroscopes involves consideration of high order systems. LQR, which achieves balances between a fast response and a low control effort, has proven to be effective for high order systems. Our simulation results show that the closed-loop 4-DOF non-resonant gyroscope presented in this paper is able to achieve faster response and higher robustness to parameter uncertainties than the open-loop device. Under the sinusoidal input, compared to an error of 11.06% for the open-loop system, the closed-loop scale factor uniformity error is reduced to 0.014% under ±10% parameter perturbations. The device performance is analyzed by the behavior modeling approach in CoventorWare. The results show that the closed-loop non-resonant gyroscope achieves better performance through the LQR. The method reported here is proven to be effective and can be used in a wide range of applications.
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Liu, Jun, Yuanyuan Luo, Jingmin Li, YunBo Shi, and Fai Ma. "An Orthogonal-Beam Tunnel-Effect MEMS Gyroscope." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21270.

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Tunnel-effect MEMS gyroscopes have broad applications in astronautics because they have high sensitivity, low measurement ranges, and small volumes. This paper describes the design of a novel orthogonal-beam gyroscope based on the principle of tunnel effect. The mathematical model of this class of gyroscopes is set up and the associated performance is obtained with ANSYS simulation software. Related MEMS technology for the construction of these orthogonal-beam tunnel-effect gyroscopes is also described.
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Yunker, William N., Pregassen Soobramaney, Meagan Black, Robert N. Dean, George T. Flowers, and Anwar Ahmed. "The Underwater Effects of High Power, High Frequency Acoustic Noise on MEMS Gyroscopes." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47180.

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Unlike their macroscale counterparts, MEMS gyroscopes use a vibrating proof mass rather than a rotational mass to sense changes in angular rate. They are also smaller and less expensive than traditional gyroscopes. For this reason, MEMS gyroscopes are being used in many new applications, some of which include operation in harsh environments. There has been much research on the negative effects of the performance of MEMS gyroscopes in environments that experience mechanical shock, high frequency vibration, and high frequency acoustic noise in air. However, MEMS gyroscopes are beginning to be used in underwater applications such as autonomous underwater vehicles, digital compasses, and torpedo guidance systems. The results of this experiment demonstrate that MEMS gyroscopes submerged in water are susceptible to high power, high frequency acoustic noise at and near the resonant frequency of the proof mass. These effects are demonstrated using the ADXRS300 MEMS gyroscope.
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Jin, Xing, and Jason V. Clark. "GyroCube: A Novice-Friendly Design and Simulation Tool for Gyroscopic Analysis and Optimization of MEMS." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89699.

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In this paper, we present an online design tool called GyroCube that greatly simplifies the parametric exploration of ready-made Micro Electro Mechanical Systems (MEMS) gyroscopes. GyroCube is able to perform gyroscopic analysis on nearly any MEMS structure imported from Sugar. In addition to Sugar’s existing MEMS solvers (i.e. frequency response, modal analysis, and transient analysis), we add gyroscope-specific analyses (i.e. quality factor, normalized sensitivity, natural frequency, stiffness, damping ratio). We also include geometry optimization given a user’s performance specification. We verify GyroCube’s results using finite element analysis and we demonstrate GyroCube’s ease of use.
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Patel, Chandradip, and Patrick McCluskey. "Performance Degradation of the MEMS Vibratory Gyroscope in Harsh Environments." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65001.

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The use of MEMS gyroscopes in a wide range of applications requiring then to function from medium to harsh environments make it necessary to evaluate the performance of MEMS gyroscopes under those conditions. This paper focuses on the effects of elevated temperature and humidity on the performance of MEMS vibratory gyroscopes. Performance of the MEMS gyroscope was evaluated by conducting Highly Accelerated Stress Testing (HAST) on a COTS (commercial-off-the-shelf) single axis MEMS vibratory gyroscope having an operating temperature range from −40C to +105C. The gyroscope sensors were exposed to 130°C and 85% relative humidity with a pressure of 33.3 psia or 230 kPa for 96 hours. Pre-baking and post-baking tests were conducted before and after HAST at 125C for 24 hours respectively. Also, stationary baseline testing (SBT) and rotary baseline testing (RBT) were performed before and after the pre-baking, HAST and post-baking tests to measure any permanent shift during the respective test. A preliminary result shows that the MEMS gyroscope output degraded in the pre-baking test and HAST; while it showed a recovery in post-baking test. After completing the entire test procedure, it was observed that MEMS gyroscope output didn’t come back to the original position, and resulted in a permanent output shift of 1.85deg/s.
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Howell, John C., Merav Kahn, Ziv Cohen, Einav Grynszpan, Umberto Bortolozzo, and Stefania Residori. "Doppler gyroscopes: Do we really understand the gyroscope?" In Quantum Sensing, Imaging, and Precision Metrology, edited by Selim M. Shahriar and Jacob Scheuer. SPIE, 2023. http://dx.doi.org/10.1117/12.2655800.

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Cui, Wei, Xiaolin Chen, and Wei Xue. "Design Optimization for Non-Resonant MEMS Gyroscope." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10812.

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Conventional capacitive MEMS gyroscopes require close matching between the resonant frequencies of drive mode and sense mode. However, the uncertainties in the microfabrication process impair the robustness of the gyroscopes and often lead to unpredictable device performance. This paper analyzes a 4 degree-of-freedom (DOF) non-resonant gyroscope which is less vulnerable to the fabrication perturbations. Unlike the conventional resonant gyroscope which has only one resonant frequency for drive and sense modes, the 4-DOF gyroscope includes two resonant frequencies for each mode. The non-resonant gyroscope design aims to reduce resonance frequency matching, namely to minimize the effect of the inevitable fabrication uncertainties as well as to increase the bandwidth with less sacrifice to the sensitivity. The device performance is analyzed and optimized by the behavior model approach in CoventorWare which significantly accelerates the simulation compared to the traditional finite element method. The optimized non-resonant gyroscope with higher fabrication tolerance as well as enhanced device performance is proven to be an effective design and can be used in a wide range of applications.
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Reports on the topic "Gyroscopes"

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Lappas, Vaios J. Combines Attitude Control and Energy Storage for Small Satellites using Variable Speed Control Moment Gyroscopes. Fort Belvoir, VA: Defense Technical Information Center, June 2008. http://dx.doi.org/10.21236/ada523084.

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Evans, Jon, Ian Porter, Emma Cockcroft, Al-Amin Kassam, and Jose Valderas. Collecting linked patient reported and technology reported outcome measures for informing clinical decision making: a scoping review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2021. http://dx.doi.org/10.37766/inplasy2021.10.0038.

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Review question / Objective: We aim to map out the existing research where concomitant use of patient reported and technology reported outcome measures is used for patients with musculoskeletal conditions. Condition being studied: Musculoskeletal disorders (MSD) covering injuries or disorders of the muscles, nerves, tendons, joints, cartilage, and spinal discs. Musculoskeletal manifestations of joint pathology. Eligibility criteria: 1) Peer-reviewed primary studies and literature reviews. Grey literature not included. 2) Studies which include co-administration of Patient-Reported Outcomes (PROMs) AND wearable electronic devices (e.g. fitness trackers, accelerometers, gyroscopes, pedometers smartphones, smartwatches) in musculoskeletal manifestations of joint pathology. Studies are EXCLUDED which feature wearable electronic devices but not concomitant/real time capturing of PROMs (e.g. they are recorded retrospectively/ at different timepoints). 3) Studies in languages other than English will be excluded unless a translation is available.
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Karwacki, Francis A., Martin A. Sanzari, and H. L. Cui. Superconducting Gyroscope,. Fort Belvoir, VA: Defense Technical Information Center, October 1996. http://dx.doi.org/10.21236/ada318927.

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Taylor. L51724 Fiber Optic Pressure Sensor Development. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1995. http://dx.doi.org/10.55274/r0010368.

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Fiber optic sensors have been under development in industrial and government laboratories around the world for over a decade The commercial market for fiber sensors for measuring parameters such as temperature, displacement, and liquid level is now estimated to exceed $50 M/year Aside from the commercial interest, the U S. Department of Defense has vigorously pursued the development of fiber gyroscopes and hydrophones In spite of the high level of research and devleopment activity, however, fiber sensors were not successfully applied in the relatively harsh environment of engine combustion chambers prior to 1991. The goal of this development is to demonstrate the utilization of a new fiber optic sensor technology in engines used for natural gas transmission. Presently, there is no way to continuously measure pressure in these engines over extended periods of operation. Reliable fiber optic sensor networks supplying data to computerized control systems for on-line engine balancing could lead to major reductions in the emission of NO, and other harmful combustion products. Fuel economies in the millions of dollars per year for companies in the natural gas transmission industry could also be realized.
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Riley, Mark, and Akis Pipidis. The Mechanical Analogue of the "Backbending" Phenomenon in Nuclear-structure Physics. Florida State University, May 2008. http://dx.doi.org/10.33009/fsu_physics-backbending.

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This short pedagogical movie illustrates an effect in nuclear physics called backbending which was first observed in the study of the rotational behavior of rapidly rotating rare-earth nuclei in Stockholm, Sweden in 1971. The video contains a mechanical analog utilizing rare-earth magnets and rotating gyroscopes on a turntable along with some historic spectra and papers associated with this landmark discovery together with its explanation in terms of the Coriolis induced uncoupling and rotational alignment of a specific pair of particles occupying high-j intruder orbitals. Thus backbending represents a crossing in energy of the groundstate, or vacuum, rotational band by another band which has two unpaired high-j nucleons (two quasi-particles) with their individual angular momenta aligned with the rotation axis of the rapidly rotating nucleus. Backbending was a major surprise which pushed the field of nuclear structure physics forward but which is now sufficiently well understood that it can be used as a precision spectroscopic tool providing useful insight for example, into nuclear pairing correlations and changes in the latter due to blocking effects and quasi-particle seniority, nuclear deformation, the excited configurations of particular rotational structures and the placement of proton and neutron intruder orbitals at the Fermi surface.
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Martin, Jorge M. Modeling an Interferometric Fiber Optic Gyroscope. Fort Belvoir, VA: Defense Technical Information Center, October 2004. http://dx.doi.org/10.21236/ada429120.

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VAWTER, GREGORY A., WALTER J. ZUBRZYCKI, GREGORY M. PEAKE, CHARLES ALFORD, TERRY HARGETT, BETTY SALTERS, JAMES J. HUDGENS, and RAGON D. KINNEY. Developments in Pursuit of a Micro-Optic Gyroscope. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/809103.

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Rohe, Michael James, and Gregory Wayne Studley. Selecting Aquifer Wells for Planned Gyroscopic Logging. Office of Scientific and Technical Information (OSTI), April 2002. http://dx.doi.org/10.2172/910978.

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S, Namachchivaya N. Nonlinear Dynamics of Parametrically Excited Gyroscopic Systems. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/836628.

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Sonsteng, Melanie. High-Precision Low-Cost Micro Birdbath Resonating Gyroscope: CRADA Final Report. Office of Scientific and Technical Information (OSTI), June 2024. http://dx.doi.org/10.2172/2372721.

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