MEMS gyroscope, working, principle of operation, example, applications, description of disc resonator gyroscope, mechatronics

1. MEMS Gyroscope
ANKUSH WAWOO (33)

2. WHAT ARE MEMS GYROSCOPE
• Your Description Goes Here
A gyroscope is
a device for
measuring or
maintaining
orientation.

3. FEW TERMS

4. THE CORIOLIS EFFECT

5. Vibrating structure gyroscope
• Piezoelectric gyroscopes
• Wine-glass resonator
• Cylindrical resonator gyroscope
(CRG)
• Tuning fork gyroscope
• Vibrating wheel gyroscope or Disc
resonator gyroscope (DRG)
TYPES

6. APPLICATIONS

7. Disc Resonating Gyro Basics

8. Operation Principle of the DRG
A vibrating object tends to continue vibrating in the
same plane as its support rotates.
• 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

10. 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

11. 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

12. Ideal Gyro
• High-Q (energy dissipation)
• Large S/N ratio
• Low-cost
• Small (1 cm3)
• Reliable
• Requiring low power

13. Advantages
• 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

14. THANK YOU !!!