Journal articles: 'Angular rate'

1

Kano, Kazuhiko. "Angular Rate Sensor." Journal of the Acoustical Society of America 130, no. 3 (2011): 1775. http://dx.doi.org/10.1121/1.3636045.

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Ogino, Mutsuhito. "Angular rate sensor and mounting structure of angular rate sensor." Journal of the Acoustical Society of America 124, no. 3 (2008): 1393. http://dx.doi.org/10.1121/1.2986184.

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Mochida, Yoichi. "Angular-rate detecting apparatus." Journal of the Acoustical Society of America 121, no. 2 (2007): 685. http://dx.doi.org/10.1121/1.2640142.

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Hall, Gregory W., Jeff R. Crandall, Gregory S. Klopp, and Walter D. Pilkey. "Angular Rate Sensor Joint Kinematics Applications." Shock and Vibration 4, no. 4 (1997): 223–29. http://dx.doi.org/10.1155/1997/243513.

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High speed rotary motion of complex joints were quantified with triaxial angular rate sensors. Angular rate sensors were mounted to rigid links on either side of a joint to measure angular velocities about three orthogonal sensor axes. After collecting the data, the angular velocity vector of each sensor was transformed to local link axes and integrated to obtain the incremental change in angular position for each time step. Using the angular position time histories, a transformation matrix between the reference frame of each link was calculated. Incremental Eulerian rotations from the transformation matrix were calculated using an axis system defined for the joint. Summation of the incremental Eulerian rotations produced the angular position of the joint in terms of the standard axes. This procedure is illustrated by applying it to joint motion of the ankle, the spine, and the neck of crash dummies during impact tests. The methodology exhibited an accuracy of less than 5% error, improved flexibility over photographic techniques, and the ability to examine 3-dimensional motion.

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An, Seungdo, Yongsoo Oh, Sang-on Choi, and Ci-moo Song. "Two-Input Axis Angular Rate Sensor." Japanese Journal of Applied Physics 37, Part 1, No. 12B (December 30, 1998): 7110–15. http://dx.doi.org/10.1143/jjap.37.7110.

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Hudson, Tracy D. "High-performance microfabricated angular rate sensor." Journal of Micro/Nanolithography, MEMS, and MOEMS 4, no. 4 (October 1, 2005): 043006. http://dx.doi.org/10.1117/1.2114787.

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7

Bordachev, D. A., I. E. Shustov, and B. A. Kazakov. "Double-count angular rate measurement device." Gyroscopy and Navigation 4, no. 4 (October 2013): 229–32. http://dx.doi.org/10.1134/s2075108713040044.

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8

Liu, Changwu, Haowen Wang, and Chen Jiang. "High-order derivative fusion estimation of rotorcraft angular rate." Aircraft Engineering and Aerospace Technology 93, no. 2 (March 19, 2021): 347–53. http://dx.doi.org/10.1108/aeat-09-2020-0203.

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Purpose The paper aims at developing a novel algorithm to estimate high-order derivatives of rotorcraft angular rates to break the contradiction between bandwidth and filtering performance because high-order derivatives of angular rates are crucial to rotorcraft control. Traditional causal estimation algorithms such as digital differential filtering or various tracking differentiators cannot balance phase-lead angle loss and high-frequency attenuation performance of the estimated differentials under the circumstance of strong vibration from the rotor system and the rather low update rate of angular rates. Design/methodology/approach The algorithm, capable of estimating angular rate derivatives to maximal second order, fuses multiple attitude signal sources through a first-proposed randomized angular motion maneuvering model independent of platform dynamics with observations generated by cascaded tracking differentiators. Findings The maneuvering flight test on 5-kg-level helicopter and the ferry flight test on 230-kg-level helicopter prove such algorithm is feasible to generate higher signal to noise ratio derivative estimation of angular rates than traditional differentiators in regular flight states with enough bandwidth for flight control. Research limitations/implications The decrease of update rate of input attitude signals will weaken the bandwidth performance of the algorithm and higher sampling rate setting is recommended. Practical implications Rotorcraft flight control researchers and engineers would benefit from the estimation method when implementing flight control laws requiring angular rate derivatives. Originality/value A purely kinematic randomized angular motion model for flight vehicle is first established, combining rigid-body Euler kinematics. Such fusion algorithm with observations generated by cascaded tracking differentiators to estimate angular rate derivatives is first proposed, realized and flight tested.

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Seeger, B., L. Klaus, and D. Nordmann. "Dynamic calibration of digital angular rate sensors." ACTA IMEKO 9, no. 5 (December 31, 2020): 394. http://dx.doi.org/10.21014/acta_imeko.v9i5.1008.

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MEMS gyroscopes/angular rate sensors are often equipped with a digital output only. As part of a European research project, the dynamic calibration of sensors with digital output is being investigated. In the following, the operation principle of digital gyroscopes is described, a possible way to derive correct timestamped data from those sensors using a digital acquisition unit is explained and a calibration procedure is presented. The calibration of the analogue input of the digital acquisition unit, which is a prerequisite to derive correct phase responses, is described. Measurements with digital sensors proved the working principles and gave insight into the dynamic behaviour of those gyroscopes.

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Azor, Ruth, Itzhack Y. Bar-Itzhack, and Richard R. Harman. "Satellite Angular Rate Estimation from Vector Measurements." Journal of Guidance, Control, and Dynamics 21, no. 3 (May 1998): 450–57. http://dx.doi.org/10.2514/2.4257.

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Azor, R., I. Y. Bar-Itzhack, J. K. Deutschmann, and R. R. Harman. "Angular-Rate Estimation Using Delayed Quaternion Measurements." Journal of Guidance, Control, and Dynamics 24, no. 3 (May 2001): 436–43. http://dx.doi.org/10.2514/2.4759.

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Veijola, Timo, Heikki Kuisma, Juha Lahdenperä, and Tapani Ryhänen. "Simulation model for micromechanical angular rate sensor." Sensors and Actuators A: Physical 60, no. 1-3 (May 1997): 113–21. http://dx.doi.org/10.1016/s0924-4247(97)01382-4.

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13

Chang, S., M. Chia, P. Castillo-Borelley, W. Higdon, Q. Jiang, J. Johnson, L. Obedier, et al. "An electroformed CMOS integrated angular rate sensor." Sensors and Actuators A: Physical 66, no. 1-3 (April 1998): 138–43. http://dx.doi.org/10.1016/s0924-4247(97)01761-5.

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14

Soderkvist, J. "Piezoelectric beams and vibrating angular rate sensors." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 38, no. 3 (May 1991): 271–80. http://dx.doi.org/10.1109/58.79612.

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15

Maenaka, Kazusuke. "Acceleration Sensors and Angular Rate Sensors (Gyroscopes)." IEEJ Transactions on Sensors and Micromachines 134, no. 7 (2014): 175–80. http://dx.doi.org/10.1541/ieejsmas.134.175.

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André, Jorge C. S., João C. Gonçalves, Gilberto C. Vaz, and Domingos X. Viegas. "Angular variation of fire rate of spread." International Journal of Wildland Fire 22, no. 7 (2013): 970. http://dx.doi.org/10.1071/wf12028.

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Laboratory fire tests were performed in still air, for variable inclinations (10°, 15°) and fuel bed dimensions (1.28×2.50–3.0×4.6m2), with homogeneous fuel beds of pine needles and pine wood excelsior. The fire ignition was made at a point, along a closed line with no fuel inside and along a straight edge of the fuel bed. The tests were recorded with an infrared camera and various techniques were developed to implement direct and indirect empirical methods of construction of the ‘orientation function’ of the fire in the given fuel bed and ambient conditions, showing how the rate of spread of a steady straight fire front depends on its orientation on the terrain. The direct method uses a set of straight fire fronts with various orientations whereas the indirect method uses essentially a point ignited fire front. Contrary to what is assumed in BehavePlus model, the orientation function is observed to depend significantly on the properties of the fuel bed. In all tests with closed fire fronts, the full steadiness required by the indirect method was not achieved (namely, at the head of the front), although, for slope angle of 10°, the corresponding errors induced on the orientation function were small.

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17

Neul, Reinhard, Udo-Martin Gmez, Kersten Kehr, Wolfram Bauer, Johannes Classen, Christian Dring, Ermin Esch, et al. "Micromachined Angular Rate Sensors for Automotive Applications." IEEE Sensors Journal 7, no. 2 (February 2007): 302–9. http://dx.doi.org/10.1109/jsen.2006.888610.

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18

Gilev, D. G., K. A. Ovchinnikov, V. V. Krishtop, and A. A. Chuvyzgalov. "Fiber Optic Resonators for Angular Rate Sensors." Bulletin of the Russian Academy of Sciences: Physics 86, S1 (December 2022): S75—S80. http://dx.doi.org/10.3103/s1062873822700423.

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19

Hamzah, Nor Hazadura, Sazali Yaacob, Ahmad Kadri Junoh, and Mohd Zamri Hasan. "The study of particle filter for satellite angular rate estimation without rate sensor measurement." MATEC Web of Conferences 150 (2018): 06010. http://dx.doi.org/10.1051/matecconf/201815006010.

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This paper studies particle filter algorithm to estimate the angular rate of a satellite without the rate sensor measurements. In this work, the performance of the algorithm is studied in terms of capability to estimate the angular rate by using the Euler angles attitude information only. The effects of the number of particles on the algorithm performance are also investigated in terms of accuracy and computational aspects. The performance of the particle filter algorithm is verified using real flight data of Malaysian satellite.

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Qiao, Xiangyu, Hironori Horiguchi, and Yoshinobu Tsujimoto. "Response of Backflow to Flow Rate Fluctuations." Journal of Fluids Engineering 129, no. 3 (August 31, 2006): 350–58. http://dx.doi.org/10.1115/1.2427081.

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The response of backflow at the inlet of an inducer to the flow rate fluctuation is studied by using three-dimensional numerical calculations based on the k-ϵ turbulence model for the discussion of its effect on cavitation instabilities. It is first shown that the size of the backflow region can be correlated with the angular momentum in the upstream and the phase of the backflow significantly delays behind the quasi-steady response even at a very low frequency. It is then shown that the conservation relation of angular momentum is satisfied with minor effects of the shear stress on the boundary. The supply of the angular momentum by the negative flow is shown to be quasi-steady due to the fact that the pressure difference across the blade causing the backflow is quasi-steady at those frequencies examined. A response function of the angular momentum in the upstream to flow rate fluctuation is derived from the balance of the angular momentum and the results of the numerical calculations. This clearly shows that the backflow responds to the flow rate fluctuation as a first-order lag element. The effects of the backflow cavitation on cavitation instabilities are discussed assuming that the delay of cavity development is much smaller than the delay of the backflow. It was found that the backflow cavitation would destabilize low frequency disturbances due to the effects of the positive mass flow gain factor but stabilize high frequency disturbances due to the effect of the cavitation compliance.

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21

Zhao, Hui, Zhong Su, Fuchao Liu, Chao Li, Qing Li, and Ning Liu. "Extraction and Filter Algorithm of Roll Angular Rate for High Spinning Projectiles." Mathematical Problems in Engineering 2019 (March 26, 2019): 1–15. http://dx.doi.org/10.1155/2019/3181727.

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The accurate measurement of roll angular rate for high spinning projectile has long been a challenging problem. Aiming to obtain the accurate roll angular rate of high spinning projectile, a novel extraction and filter algorithm, BSCZT-KF, is proposed in this paper. Firstly, a compound angular motion model of high spinning projectile is established. According to the model, we translate the roll angular rate measurement problem into a frequency estimation problem. Then the improved CZT algorithm, BSCZT, was employed to realize an accurate estimation of the narrowband signal frequency. Combined with the peak detection method, the BSCZT-KF algorithm is presented to further enhance the frequency estimation accuracy and the real-time performance. Finally, two sets of actual flight tests were conducted to verify the effectiveness and accuracy of the algorithm. The test results show that the average error of estimated roll angular rate is about 0.095% of the maximum of roll angular rate. Compared with the existing methods, the BSCZT-KF has the highest frequency estimation accuracy for narrowband signal.

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22

Podchezertsev, V. P., and D. D. Nguyen. "Evaluation of the Experiment Factors Influence in Studying Dynamic Error of the TwoComponent Angular Rate Sensor." Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 4 (141) (December 2022): 92–107. http://dx.doi.org/10.18698/0236-3933-2022-4-92-107.

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Angular rate sensors are widely used in various technology areas, especially in aviation and rocket technologies. Angular rate sensors are installed in aircraft stabilization, orientation and navigation systems to determine the object angular position and control. In addition, they could be introduced in the automatic control systems of a moving object to enter a signal proportional to the angular rate in the control function or to damp the object oscillations occurring under the action of angular or linear overloads. Various design schemes of angular rate sensors are currently known to perform their functionality with required accuracy in the given frequency range. For them, the influence of design parameters and feedback loop on the accuracy of a device under conditions of dynamic operational influences was studied sufficiently. Biaxial angular rate sensor built on the basis of a dynamically tuned gyroscope was considered, and the influence of various design and technological factors on the experimental estimated accuracy of its dynamic error was studied. Main probable factors leading to inaccuracies in determining this error in testing on the angular oscillations bench were considered

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Yadav, Sushil, Rajiv Aggarwal, and Bhavneet Kaur. "Resonance in the perturbations of a synchronous satellite due to angular rate of the earth-moon system around the sun and the earth’s rotation rate." International Journal of Advanced Astronomy 4, no. 2 (July 5, 2016): 68. http://dx.doi.org/10.14419/ijaa.v4i2.6227.

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This paper investigates resonances in the perturbations of a synchronous satellite including its latitude, angular rate of the earth-moon system around the sun and the earth’s rotation rate about its axis. This is found that resonances occur due to the commensurability between (i) angular velocity of the satellite and angular rate of earth’s rotation about its axis and (ii) angular rate of the earth-moon system around the sun and angular rate of the rotation of the earth. Amplitude and time-period of the oscillation at the resonance points are determined using the procedure of Brown and Shook [3]. Effect of (orbital angle of the mass-centre of the earth-moon system around the sun) on amplitude and time period is also analyzed. It is found that for increasing the values of from to amplitude decreases and time period also decreases. Effect of time on the latitude of the satellite including earth oblateness is also studied. It is seen that for increasing the value of , there is a small change in , the latitude of the synchronous satellite.

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Cobb, Bryan R., Abigail M. Tyson, and Steven Rowson. "Head acceleration measurement techniques: Reliability of angular rate sensor data in helmeted impact testing." Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 232, no. 2 (June 28, 2017): 176–81. http://dx.doi.org/10.1177/1754337117708092.

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This study sought to evaluate the suitability of angular rate sensors for quantifying angular acceleration in helmeted headform impacts. A helmeted Hybrid III headform, instrumented with a 3-2-2-2 nine accelerometer array and angular rate sensors, was impacted (n = 90) at six locations and three velocities (3.1, 4.9, and 6.4 m/s). Data were low-pass filtered using Butterworth four-pole phaseless digital filters which conform to the specifications described in the Society of Automotive Engineers J211 standard on instrumentation for impact tests. Nine accelerometer array data were filtered using channel frequency class 180, which corresponds to a −3 db cutoff frequency of 300 Hz. Angular rate sensor data were filtered using channel frequency class values ranging from 5 to 1000 Hz in increments of 5 Hz, which correspond to −3 db cutoff frequencies of 8 to 1650 Hz. Root-mean-square differences in peak angular acceleration between the two instrumentation schemes were assessed for each channel frequency class value. Filtering angular rate sensor data with channel frequency class values between 120 and 205 all produced mean differences within ±5%. The minimum root-mean-square difference of 297 rad/s2 was found when the angular rate sensor data were filtered using channel frequency class 175. This filter specification resulted in a mean difference of 28 ± 297 rad/s2 (1.8% ± 8.6%). Condition-specific differences (α=0.05) were observed for 11 of 18 test conditions. A total of 4 of those 11 conditions were within ±5%, and 10 were within ±10%. Furthermore, the nine accelerometer array and angular rate sensor methods demonstrated similar levels of repeatability. These data suggest that angular rate sensor may be an appropriate alternative to the nine accelerometer array for measuring angular head acceleration in helmeted head impact tests with impactor velocities of 3.1–6.4 m/s and impact durations of approximately 10 ms.

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Zhang, Shuo, Fei Xing, Ting Sun, and Zheng You. "Variable Angular Rate Measurement for a Spacecraft Based on the Rolling Shutter Mode of a Star Tracker." Electronics 12, no. 8 (April 16, 2023): 1875. http://dx.doi.org/10.3390/electronics12081875.

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Angular rate is a piece of useful information for the attitude control of a spacecraft. The star tracker as a space optical sensor can be used to measure the angular rate of a spacecraft. In this paper, a novel approach is proposed to improve the measurement accuracy of the angular rate during spacecraft rotation. The electronic rolling shutter (RS) imaging mode of the complementary metal-oxide semiconductor (CMOS) image sensor in a star tracker is applied to obtain much higher sampling frequency for reducing the change of the angular rate between the sampling interval. The optic flow vector on the imaging plane is approximated within the second order using three successive star images to reflect the nonlinear effect from the variable angular rate. The experiment is performed to demonstrate the advantage of the new approach for variable angular rate measurement.

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Qu, Yilin, Feng Jin, and Jiashi Yang. "Vibrating Flexoelectric Micro-Beams as Angular Rate Sensors." Micromachines 13, no. 8 (August 2, 2022): 1243. http://dx.doi.org/10.3390/mi13081243.

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We studied flexoelectrically excited/detected bending vibrations in perpendicular directions of a micro-beam spinning about its axis. A set of one-dimensional equations was derived and used in a theoretical analysis. It is shown that the Coriolis effect associated with the spin produces an electrical output proportional to the angular rate of the spin when it is small. Thus, the beam can be used as a gyroscope for angular rate sensing. Compared to conventional piezoelectric beam gyroscopes, the flexoelectric beam proposed and analyzed has a simpler structure.

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Patera, Russell P. "Attitude Propagation for a Slewing Angular Rate Vector." Journal of Guidance, Control, and Dynamics 33, no. 6 (November 2010): 1847–55. http://dx.doi.org/10.2514/1.48790.

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28

Macy, David F., and Evert C. Alsenz. "Vibratory linear acceleration and angular rate sensing system." Journal of the Acoustical Society of America 90, no. 2 (August 1991): 1212. http://dx.doi.org/10.1121/1.402000.

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29

Tsai, Nan-Chyuan. "Micro angular rate sensor design and nonlinear dynamics." Journal of Micro/Nanolithography, MEMS, and MOEMS 6, no. 3 (July 1, 2007): 033008. http://dx.doi.org/10.1117/1.2778645.

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30

Netzer, Ehud, and Itzhak Porat. "A Novel Vibratory Device for Angular Rate Measurement." Journal of Dynamic Systems, Measurement, and Control 117, no. 4 (December 1, 1995): 585–91. http://dx.doi.org/10.1115/1.2801118.

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A vibratory angular rate sensor includes a vibrating element instead of a rotating element as in gyroscopes. The vibratory sensor can withstand high accelerations, has long operating life, and is not costly. A new configuration for a vibratory sensor is proposed and analyzed. The proposed scheme has high mechanical gain and low sensitivity to changes in its parameters. An experimental prototype was built and tested, and the results show good agreement with the analysis.

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31

Chen, Xiyuan, and Chuanye Tang. "Improved class of angular rate-based coning algorithms." IEEE Transactions on Aerospace and Electronic Systems 52, no. 5 (October 2016): 2220–29. http://dx.doi.org/10.1109/taes.2016.150450.

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32

Kausinis, Saulius, and Rimantas Barauskas. "Computer simulation of a piezoelectric angular rate sensor." Measurement 39, no. 10 (December 2006): 947–58. http://dx.doi.org/10.1016/j.measurement.2006.04.001.

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33

Geiger, Wolfram, Jürgen Merz, Thomas Fischer, Bernd Folkmer, Hermann Sandmaier, and Walter Lang. "The silicon angular rate sensor system DAVED®." Sensors and Actuators A: Physical 84, no. 3 (September 2000): 280–84. http://dx.doi.org/10.1016/s0924-4247(00)00392-7.

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Seok, Jongwon, and Henry A. Scarton. "Dynamic characteristics of a beam angular-rate sensor." International Journal of Mechanical Sciences 48, no. 1 (January 2006): 11–20. http://dx.doi.org/10.1016/j.ijmecsci.2005.09.015.

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Asokanthan, Samuel F., and Jihyun Cho. "Dynamic stability of ring-based angular rate sensors." Journal of Sound and Vibration 295, no. 3-5 (August 2006): 571–83. http://dx.doi.org/10.1016/j.jsv.2006.01.028.

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Szybicki, Dariusz, Łukasz Rykała, and Magdalena Muszyńska. "Description phenomenon of balancing masses in angular rate." Journal of Civil Engineering, Environment and Architecture XXXI, no. 61 (2/14) (September 2014): 161–72. http://dx.doi.org/10.7862/rb.2014.38.

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Fujiyoshi, Motohiro, Yutaka Nonomura, Yoshiteru Omura, Norio Fujitsuka, Kentaro Mizuno, and Kouji Tsukada. "SOI Angular Rate Sensor with Open Beam Structure." IEEJ Transactions on Sensors and Micromachines 126, no. 8 (2006): 425–30. http://dx.doi.org/10.1541/ieejsmas.126.425.

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John, J. D., C. F. Jakob, T. Vinay, and L. Qin. "Phase Differential Angular Rate Sensor—Concept and Analysis." IEEE Sensors Journal 4, no. 4 (August 2004): 471–78. http://dx.doi.org/10.1109/jsen.2004.830962.

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Larin, V. B., and A. A. Tunik. "On Inertial-Navigation System without Angular-Rate Sensors." International Applied Mechanics 49, no. 4 (July 2013): 488–99. http://dx.doi.org/10.1007/s10778-013-0582-x.

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Jiang, Xiaojuan, and Fuchao Huang. "Research on A Gyro Error Calibration Method Based on Dynamic Compensation." Academic Journal of Science and Technology 5, no. 2 (March 30, 2023): 174–78. http://dx.doi.org/10.54097/ajst.v5i2.6858.

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Gyroscopes in Micro-Electro-Mechanical Systems (MEMS) technology have high accuracy, convenient use, and broad application prospects. In practical applications, it is found that angular rate error is one of the main reasons that affect the output accuracy of gyroscopes. In the angular rate error calibration of MEMS gyroscopes, the method of calibrating the gyroscopes only by changing the bias and scale coefficients obtained by fitting cannot meet the angular rate error calibration of MEMS gyroscopes whose dynamic range exceeds . Therefore, the research proposes an improved calibration method to solve the problem of angular rate error, using dynamic compensation algorithms to achieve dynamic compensation for the angular rate of MEMS gyroscopes. Experiments show that using the dynamic compensation calibration method proposed in this paper, the root mean square error of the angular rate of MEMS gyroscopes has decreased by 52.37% compared to the previous one, verifying the feasibility of this method.

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Kapoor, Shubha, Kanu Priya Govila, M. S. Siva, A. K. Kulkarni, and N. K. Philip. "Attitude independent Spacecraft Angular Rate Estimation and Rate Damping using Magnetometer data." IFAC-PapersOnLine 49, no. 1 (2016): 343–48. http://dx.doi.org/10.1016/j.ifacol.2016.03.077.

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Park, Myeong-Gu, and Du-Hwan Han. "Hot Accretion onto Black Holes with Outflow." EPJ Web of Conferences 168 (2018): 04005. http://dx.doi.org/10.1051/epjconf/201816804005.

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Classic Bondi accretion flow can be generalized to rotating viscous accretion flow. Study of hot accretion flow onto black holes show that its physical charateristics change from Bondi-like for small gas angular momentum to disk-like for Keperian gas angular momentum. Especially, the mass accretion rate divided by the Bondi accretion rate is proportional to the viscosity parameter alpha and inversely proportional to the gas angular momentum divided by the Keplerian angular momentum at the Bondi radius for gas angular momentum comparable to the Keplerian value. The possible presence of outflow will increase the mass inflow rate at the Bondi radius but decrease the mass accretion rate across the black hole horizon by many orders of magnitude. This implies that the growth history of supermassive black holes and their coevolution with host galaxies will be dramatically changed when the accreted gas has angular momentum or develops an outflow.

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Yu, Quan Gang, Lin Hua Piao, and Xing Wang. "The Theoretical Research of the Piezoelectric Fluid Spinning Top." Advanced Materials Research 462 (February 2012): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amr.462.242.

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In this paper, a mathematical model of the piezoelectric fluidic angular rate sensor is created. At first, starting from the Coriolis acceleration, obtain a comparison expression for the angular rate and the flow velocity. At second, according to the heat balance theory, solve a comparison expression for the thermal resistance wire current and flow velocity under the forced convection heat transfer condition. At last, obtain a comparison expression for the angular rate and the thermal resistance wire current. Thus a mathematical model of the piezoelectric fluidic angular rate sensor is created. Experiments prove that the average deviation between theoretical and experimental values is less than 10%.

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Ueno, Mami, Rock Santerre, and Alfred Kleusberg. "Direct Determination of Angular Velocity Using GPS." Journal of Navigation 53, no. 2 (May 2000): 371–79. http://dx.doi.org/10.1017/s0373463300008900.

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Controlling a ship in a berthing operation is carried out mainly by the change of state, such as velocity and yaw rate (turn rate), although the value of the change of state is very small at berthing. Very high precision is, therefore, required to determine the velocity and angular velocity. A sensor that has an accuracy of ±0.02°/s (1 σ) is sought for determination of turn rate in a berthing system. Three-dimensional angular velocity can directly be determined, with 2 independent baselines of 3 GPS antennas, using instantaneous Doppler measurements or phase rate (temporal difference of phase) observations. This paper discusses the mathematical model for direct determination of angular velocity using GPS, and the comparison of the results of the angular velocity determination using the Doppler and phase rate. The precision of angular velocity determination is estimated using temporal difference of the attitude sensors (TSS and gyrocompass) on board a hydrographic sounding ship. The RMS values of the difference of yaw rate determination between the two systems were: ±0.16°/s using phase rate and ±0.31°/s using Doppler measurements with the separation of onboard antennas of ca. 1·34 m. 10 m baselines could satisfy the sensor requirements for angular velocity determination during berthing maneuvers.

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Mi, Jing, Jie Li, Xi Zhang, Kaiqiang Feng, Chenjun Hu, Xiaokai Wei, and Xiaoqiao Yuan. "Roll Angular Rate Measurement for High Spinning Projectiles Based on Redundant Gyroscope System." Micromachines 11, no. 10 (October 16, 2020): 940. http://dx.doi.org/10.3390/mi11100940.

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Precision-guided projectiles, which can significantly improve the accuracy and efficiency of fire strikes, are on the rise in current military engagements. The accurate measurement of roll angular rate is critical to guide a gun-launched projectile. However, Micro-Electro-Mechanical System (MEMS) gyroscope with low cost and large range cannot meet the requirement of high precision roll angular rate measurement due to the limitation by the current technology level. Aiming at the problem, the optimization-based angular rate estimation (OBARS) method specific for projectiles is proposed in this study. First, the output angular rate model of redundant gyroscope system based on the autoregressive integrated moving average (ARIMA) model is established, and then the conventional random error model is improved with the ARIMA model. After that, a Sage-Husa Adaptive Kalman Filter (SHAKF) algorithm that can suppress the time-varying process and measurement noise under the flight condition of the high dynamic of the projectile is designed for the fusion of dynamic data. Finally, simulations and experiments have been carried out to validate the performance of the method. The results demonstrate the proposed method can effectively improve the angular rate accuracy more than the related traditional methods for high spinning projectiles.

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Zhang, Yanshun, Chuang Peng, Dong Mou, Ming Li, and Wei Quan. "An Adaptive Filtering Approach Based on the Dynamic Variance Model for Reducing MEMS Gyroscope Random Error." Sensors 18, no. 11 (November 14, 2018): 3943. http://dx.doi.org/10.3390/s18113943.

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To improve the dynamic random error compensation accuracy of the Micro Electro Mechanical System (MEMS) gyroscope at different angular rates, an adaptive filtering approach based on the dynamic variance model was proposed. In this paper, experimental data were utilized to fit the dynamic variance model which describes the nonlinear mapping relations between the MEMS gyroscope output data variance and the input angular rate. After that, the dynamic variance model was applied to online adjustment of the Kalman Filter measurement noise coefficients. The proposed approach suppressed the interference from the angular rate in the filtering results. Dynamic random errors were better estimated and reduced. Turntable experiment results indicated that the adaptive filtering approach compensated for the MEMS gyroscope dynamic random error effectively both in the constant angular rate condition and the continuous changing angular rate condition, thus achieving adaptive dynamic random error compensation.

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Asokanthan, Samuel F., and Jihyun Cho. "Dynamic Stability of Beam-type Vibratory Angular Rate Sensors Subjected to Rate Fluctuations." Journal of Intelligent Material Systems and Structures 19, no. 6 (July 10, 2007): 735–43. http://dx.doi.org/10.1177/1045389x07080631.

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Konno, Masashi, Hisashi Nakamura, and Sumio Sugawara. "Equivalent Mechanical Circuits of Tuning Fork Angular Rate Gyros." Japanese Journal of Applied Physics 26, S1 (January 1, 1987): 150. http://dx.doi.org/10.7567/jjaps.26s1.150.

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YAN Shu-bin, 闫树斌, 安盼龙 AN Pan-long, 郑永秋 ZHENG Yong-qiu, 李小枫 LI Xiao-feng, 赵瑞娟 ZHAO Rui-juan, 张成飞 ZHANG Cheng-fei, 薛晨阳 XUE Chen-yang, and 刘俊 LIU Jun. "High-Q Optical Ring Resonator Gyro Angular Rate Sensor." ACTA PHOTONICA SINICA 43, no. 12 (2014): 1214002. http://dx.doi.org/10.3788/gzxb20144312.1214002.

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Li, Kai, Yuan Li, and Yan Han. "An EM Induction Hi-Speed Rotation Angular Rate Sensor." Sensors 17, no. 3 (March 17, 2017): 610. http://dx.doi.org/10.3390/s17030610.

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Journal articles on the topic 'Angular rate'

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