Bandwidth extension for continuous mode reversal gyroscope

US11680799B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Bernhard Boser · Berkeley, US
• Burak Eminoglu · Berkeley, US

Key dates

• Filing date: Apr 3, 2020
• Grant date: Jun 20, 2023
• Expiry date: Jun 23, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C19/5726
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A vibratory gyroscope system having a mechanical resonator (proof mass) and drive circuitry for maintaining oscillation in two axes at a small frequency split. Angular rate input is shifted to the frequency split and modulates both the frequency (FM) and the amplitude (AM) of the oscillations. Unlike other gyroscope modulation techniques which derive rate information from only the FM information and are subject to aliasing for rate signals with bandwidth exceeding the modulation frequency, the innovation uses both the FM and AM information. By exploiting their orthogonality, the image frequencies from the modulation cancel, thus removing the bandwidth limitation.