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Related Concept Videos

Gyroscope01:02

Gyroscope

A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
Spherical and Cylindrical Capacitor01:26

Spherical and Cylindrical Capacitor

A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field, calculated by...
Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
Equivalent Capacitance01:19

Equivalent Capacitance

Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
Equivalent Capacitance01:19

Equivalent Capacitance

From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
Capacitors and Capacitance01:18

Capacitors and Capacitance

A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...

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Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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A micro dynamically tuned gyroscope with adjustable static capacitance.

Dunzhu Xia1, Cheng Yu, Lun Kong

  • 1Key Laboratory of Micro-inertial Instrument and Advanced Navigation Technology, Ministry of Education, Southeast University, Nanjing 210096, China. xiadz_1999@163.com

Sensors (Basel, Switzerland)
|February 8, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel micro dynamically tuned gyroscope (MDTG) with adjustable static capacitance. This design allows for an easily changeable scale factor, meeting application requirements.

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Area of Science:

  • MEMS technology
  • Inertial sensing

Background:

  • Micro dynamically tuned gyroscopes (MDTGs) are crucial for inertial sensing.
  • Adjustable static capacitance in MDTGs offers potential for enhanced performance and adaptability.

Purpose of the Study:

  • To present a novel micro dynamically tuned gyroscope (MDTG) with adjustable static capacitance.
  • To detail the theoretical analysis, fabrication, and simulation of the MDTG.

Main Methods:

  • Theoretical analysis of the MDTG principle.
  • Simulation of optimized structure parameters for mask design.
  • Detailed description of fabrication processes for rotor wafer and electrode plates.
  • Design of an assembly model for static capacitance adjustment.
  • Simulation of a digitalized closed-loop measurement circuit with discrete correction and decoupling modules.

Main Results:

  • Fabrication process confirmed effective and optimized via SEM.
  • Static capacitance adjustability achieved through mechanical design.
  • Closed-loop system simulations show bandwidths exceeding 60 Hz.
  • Symmetrical dual-axis scale factors and minimized cross-coupling effects demonstrated.
  • Test results for static and dynamic capacitance values align with simulations.

Conclusions:

  • The proposed MDTG fabrication process is effective and meets application requirements.
  • The adjustable static capacitance design allows for easy scale factor changes.
  • The digitalized closed-loop system demonstrates stable and high-performance operation.