公开(公告)号：US20180143021A1

公开(公告)日：2018-05-24

申请号：US15799922

申请日：2017-10-31

Applicant: Simon Fraser University

Inventor： Farid Golnaraghi ,  Behraad Behreyni ,  Amr Marzouk ,  Atabak Sarrafan ,  S. Amir Mousavi Lajimi ,  Oldooz Pooyanfar ,  Navid Noori

IPC: G01C19/5656 ,  G01C19/5649

CPC classification number: G01C19/5656 ,  G01C19/5642 ,  G01C19/5649

Abstract: The disclosed devices utilize nonlinearly coupled modes of vibration to provide robust inertial sensors, such as gyroscopes. This actuation mechanism introduces a wider bandwidth in the sense-mode frequency response curve, and consequently enhances robustness to parameter fluctuations due to operating conditions and fabrication imperfections. The vibratory modes of the device are designed to have distinct frequencies where the drive-mode natural frequency is twice the modal frequency of the sense mode. The nonlinear modal interaction due to internal resonance can also be magnified through nonlinearity feedback. The sense mode response can be enhanced in shape, quality factor, and bandwidth by feeding back nonlinear quadratic, cubic, etc. terms.

公开(公告)号：US20200011666A1

公开(公告)日：2020-01-09

申请号：US16557841

申请日：2019-08-30

Applicant: Simon Fraser University

Inventor： Farid Golnaraghi ,  Behraad Bahreyni ,  Amr Marzouk ,  Atabak Sarrafan ,  S. Amir Mousavi Lajimi ,  Oldooz Pooyanfar ,  Navid Noori

IPC: G01C19/5656 ,  G01C19/5649

Abstract: The disclosed devices utilize nonlinearly coupled modes of vibration to provide robust inertial sensors, such as gyroscopes. This actuation mechanism introduces a wider bandwidth in the sense-mode frequency response curve, and consequently enhances robustness to parameter fluctuations due to operating conditions and fabrication imperfections. The vibratory modes of the device are designed to have distinct frequencies where the drive-mode natural frequency is twice the modal frequency of the sense mode. The nonlinear modal interaction due to internal resonance can also be magnified through nonlinearity feedback. The sense mode response can be enhanced in shape, quality factor, and bandwidth by feeding back nonlinear quadratic, cubic, etc. terms.