The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2007
Filed:
May. 11, 2004
A. Dorian Challoner, Manhattan Beach, CA (US);
Roman C. Gutierrez, La Crescenta, CA (US);
Tony K. Tang, Glendale, CA (US);
A. Dorian Challoner, Manhattan Beach, CA (US);
Roman C. Gutierrez, La Crescenta, CA (US);
Tony K. Tang, Glendale, CA (US);
The Boeing Company, Chicago, IL (US);
Abstract
A micro-gyroscope () having closed loop output operation by a control voltage (V), that is demodulated by a drive axis (x-axis) signal Vof the sense electrodes (S, S), providing Coriolis torque rebalance to prevent displacement of the micro-gyroscope () on the output axis (y-axis) V˜0. Closed loop drive axis torque, Vmaintains a constant drive axis amplitude signal, V. The present invention provides independent alignment and tuning of the micro-gyroscope by using separate electrodes and electrostatic bias voltages to adjust alignment and tuning. A quadrature amplitude signal, or cross-axis transfer function peak amplitude is used to detect misalignment that is corrected to zero by an electrostatic bias voltage adjustment. The cross-axis transfer function is either V/Vor V/V. A quadrature signal noise level, or difference in natural frequencies estimated from measurements of the transfer functions is used to detect residual mistuning, that is corrected to zero by a second electrostatic bias voltage adjustment.