Mems gyroscope working, principle of operation of disc resonator gyroscope
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Transcript of Mems gyroscope working, principle of operation of disc resonator gyroscope
MEMS GyroscopeMEMS Gyroscope
ANKUSH WAWOO (33)ANKUSH WAWOO (33)
WHAT ARE MEMS GYROSCOPEWHAT ARE MEMS GYROSCOPE
• Your Description Goes Here
A gyroscope is
a device for
measuring or
maintaining
orientation.
FEW TERMSFEW TERMS
THE CORIOLIS EFFECTTHE CORIOLIS EFFECT
Vibrating structure gyroscopeVibrating structure gyroscope
• Piezoelectric gyroscopes• Wine-glass resonator• Cylindrical resonator
gyroscope (CRG)• Tuning fork gyroscope• Vibrating wheel gyroscope or
Disc resonator gyroscope (DRG)
TYPES
APPLICATIONSAPPLICATIONS
Disc Resonating Gyro Basics
Disc Resonating Gyro Basics
Operation Principle of the DRG
Operation Principle of the DRG
• Gyroscope is driven to resonate in-plane
• Electrodes sense deflection in outer ring sockets
• Electrodes actuate in inner ring sockets
• Circuits process the signal and feedback into the system
A vibrating object tends to continue vibrating in the same plane as its support rotates.
Coriolis Effect Coriolis Effect
• Coriolis acceleration (a) occurs if a resonating disc is perturbed
• Depends on velocities on the disc higher frequencies allow Coriolis acceleration to dominate centrifugal acceleration
• Coriolis acceleration is what the electrodes sense through change in capacitance
How Does the DRG Work?How Does the DRG Work?
• DC Source creates an electrostatic force that moves the disc
• Proper control of these electrodes can put the system into resonance
• Similarly, the sensing electrodes use gap changes to gauge system changes
Ideal GyroIdeal Gyro
• High-Q (energy dissipation)
• Large S/N ratio• Low-cost• Small (1 cm3)• Reliable• Requiring low power
AdvantagesAdvantages
• GRG has large sensing area compared to other gyros
• Easy to package• Multiple sensing and driving
electrodes can make it easier to operate and read
• MEMS gyroscopes desirable because they are lightweight and cheaper to produce
THANK YOU !!!