Invention Grant
- Patent Title: Balanced vibratory gyroscope and amplitude control for same
- Patent Title (中): 平衡振动陀螺仪和幅度控制相同
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Application No.: US239632Application Date: 1999-01-29
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Publication No.: US6164134APublication Date: 2000-12-26
- Inventor: Donald R. Cargille
- Applicant: Donald R. Cargille
- Applicant Address: CA El Segundo
- Assignee: Hughes Electronics Corporation
- Current Assignee: Hughes Electronics Corporation
- Current Assignee Address: CA El Segundo
- Main IPC: G01C19/5719
- IPC: G01C19/5719 ; G01P15/125 ; G01P15/14 ; G01P15/18 ; G01C19/00
Abstract:
A balanced vibratory micro-gyroscope having an electrode pattern having four inner drive electrodes and four outer sense electrodes for providing balanced push-pull control of a cloverleaf micro-gyroscope. A control circuit utilizes equal and opposite input signals to the drive electrodes and processes output signals from the sense electrodes to precisely control the drive electrodes. Capacitance is added between opposing drive and sense electrodes pattern in order to null capacitive coupling effects between adjacent drive and sense electrodes. The control circuit linearizes the force on the micro-gyroscope thereby improving performance. Advantage is taken of Coulomb's Law to eliminate an electronic multiplier in the vibration amplitude control loop. A simplified full-wave rectifier further enhances the control circuit and operation of the micro-gyroscope. A closed negative feedback loop in the control circuit provides a corrective signal to the rate driving electrodes through rate sensing signals in order to prevent unwanted harmonic movement in the micro-gyroscope.
Public/Granted literature
- US5463520A Electrostatic discharge protection with hysteresis trigger circuit Public/Granted day:1995-10-31
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