Results 41 to 50 of about 69,015 (229)

Adiabaticity Engineered Silicon Coupler With Design-Intended Splitting Ratio

IEEE Photonics Journal
We design and experimentally demonstrate compact and robust adiabaticity engineered couplers (AECs) with design intended splitting ratios (SRs) for the silicon-on-insulator platform.
Chih-Hsien Chen, Yu-Fang Lo, Guan-Xun Lu, Yung-Jr Hung, Shuo-Yen Tseng   +4 more
doaj   +1 more source

Error research of attitude measurements on low-cost UAV-borne missile

Xibei Gongye Daxue Xuebao, 2022
The framed gyroscope can significantly reduce the cost of missile. However, the gyroscope error problem restricts the acquisition probability and guidance precision of air-to-ground missile.
LI Peng, ZHANG Jie, XU Hongwei, WANG Xuan, WU Heke   +4 more
doaj   +1 more source

Research on Optical Fiber Ring Resonator Q Value and Coupling Efficiency Optimization

Micromachines, 2023
The coupling efficiency of the fiber ring resonator has an important influence on the scale factor of the resonant fiber gyroscope. In order to improve the scale factor of the gyroscope, the coupling efficiency of the fiber ring resonator and its ...
Shengkun Li, Xiaowen Tian, Sining Tian
doaj   +1 more source

Cosmological gravitomagnetism and Mach's principle

, 2006
The spin axes of gyroscopes experimentally define local non-rotating frames. But what physical cause governs the time-evolution of gyroscope axes? We consider linear perturbations of Friedmann-Robertson-Walker cosmologies with k=0.
A. Einstein, A. Einstein, A. Einstein, C. W. Misner, Christoph Schmid, D. Lynden-Bell, D. Lynden-Bell, E. Cartan, E. Mach, E. Mach, E. Mach, H. Kodama, H. Thirring, H. Thirring, I. Ciufolini, T. J. McCormack   +15 more
core   +1 more source

Tri-spin dynamics in alkali metal-noble gas NMR gyroscope

, 2019
Alkali metal-noble gas NMR gyroscope is widely used for precision rotation measurement in fundamental and applied physics. By numerically simulating the alkali-nuclear-nuclear tri-spin dynamics, we investigate the dependence of gyroscope response on ...
Liu, Guobin
core   +1 more source

Study on the Mechanism of Energy Dissipation in Hemispherical Resonator Gyroscope

Sensors
The hemispherical resonator gyroscope is a gyroscope based on the principle of Coriolis vibration, widely used in inertial measurement systems of spacecraft. This article decomposes the gyroscope into two parts: the resonator shell and the gyroscope head,
Lishan Yuan, Ning Wang, Ronghao Xie, Zhennan Wei, Qingshuang Zeng, Changhong Wang   +5 more
doaj   +1 more source

Fiber-Optic-Gyroscope Measurements Close to Rotating Liquid Helium

, 2009
We previously reported anomalous fiber-optic gyroscope signals observed above rotating rings at temperatures close to liquid helium. Our results suggested that the liquid helium itself may be the source of our observed phenomenon.
Plesescu, F., Tajmar, M.
core   +1 more source

Can one detect a non-smooth null infinity? [PDF]

, 2001
It is shown that the precession of a gyroscope can be used to elucidate the nature of the smoothness of the null infinity of an asymptotically flat spacetime (describing an isolated body).
Bondi H, Bonnor W B, Chrusciel P T, Chrusciel P T, Courant R, Ellis G F R, Hernández J, Herrera L, Juan Antonio Valiente Kroon, Leipold G, Penrose R, Rindler W, Sachs R K, Sachs R K, Sommerfeld A, Valiente Kroon J A, Valiente Kroon J A, Valiente Kroon J A, Valiente Kroon J A, Walker M   +19 more
core   +2 more sources

Validity of a Wearable Digital Insole for Assessing Gait ON and OFF in Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Gait impairment is a distinctive symptom of Parkinson's disease that negatively impact mobility. We assessed the validity of wearable digital insoles against a validated reference gait analysis system for measuring select gait characteristics in patients with Parkinson's disease. Methods A comparative analysis between digital insoles
Deborah A. Hall, Kimberly Kwei, Rolando J. Acosta, Bharatkumar Koyani, Erin Robertson, Pratyush Rai, Roland Barge, Emily Timm, Nicollette L. Purcell, Natasha Desai, Dhanesh Patel, Ana‐Maria Visoiu‐Knapp, Samuel Stuart, Rinol Alaj, Matthew F. Wipperman, Oren Levy, Joan A. O'Keefe   +16 more
wiley   +1 more source

Mobile Robot Integrated with Gyroscope by Using IKF

International Journal of Advanced Robotic Systems, 2011
This paper mainly proposes absolute positioning instruments using camera positioning system and compass. The absolute positioning systems are used to estimate absolute position and orientation errors combined with estimated position and orientation from ...
Surachai Panich, Nitin Afzulpurkar
doaj   +2 more sources