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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,...
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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...
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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
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Rotation with Constant Angular Acceleration - I01:37

Rotation with Constant Angular Acceleration - I

If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
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Rotation with Constant Angular Acceleration - II01:16

Rotation with Constant Angular Acceleration - II

Kinematics is the description of motion. The kinematics of rotational motion discusses the relationships between rotation angle, angular velocity, angular acceleration, and time. One can describe many things with great precision using kinematics, but kinematics does not consider causes. For example, a large angular acceleration describes a very rapid change in angular velocity without any consideration of its cause. Thus, rotational kinematics does not represent the laws of nature.
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Method to Measure Tone of Axial and Proximal Muscle
10:41

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Published on: December 14, 2011

Adaptive control of a vibratory angle measuring gyroscope.

Sungsu Park1

  • 1Department of Aerospace Engineering, Sejong University, 98, Gunja-dong, Kwangjin-gu, Seoul 143-747, Korea. sungsu@sejong.ac.kr

Sensors (Basel, Switzerland)
|December 14, 2011
PubMed
Summary

This study introduces an adaptive control algorithm for vibratory gyroscopes, enabling direct angle measurement without integration errors. This innovative method enhances accuracy by compensating for gyroscope imperfections online.

Keywords:
adaptive controlangle measurementtrajectory followingvibratory gyroscope

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Area of Science:

  • Control Systems Engineering
  • Mechanical Engineering
  • Sensor Technology

Background:

  • Traditional gyroscopes often rely on integrating angular rate, leading to accumulated numerical errors.
  • Vibratory gyroscopes offer an alternative but require sophisticated control for accurate angle measurement.

Purpose of the Study:

  • To develop an adaptive control algorithm for vibratory angle measuring gyroscopes.
  • To enable direct measurement of rotation angle, bypassing numerical integration of angular rate.
  • To eliminate accumulated errors inherent in integration-based methods.

Main Methods:

  • An adaptive control algorithm employing a trajectory following approach is proposed.
  • A reference trajectory is generated using an ideal gyroscope model with estimated angular rate and auxiliary sinusoidal input.
  • The control strategy ensures persistent excitation for robust online compensation of imperfections.

Main Results:

  • The algorithm effectively compensates for fabrication imperfections like coupled damping, stiffness mismatches, and unequal damping online.
  • Simulation results demonstrate the feasibility and effectiveness of the developed control algorithm.
  • Direct measurement of rotation angle without angular rate integration is achieved.

Conclusions:

  • The proposed adaptive control algorithm enables direct, accurate angle measurement from vibratory gyroscopes.
  • The method successfully mitigates errors caused by sensor imperfections through online compensation.
  • This approach offers a significant advancement in high-precision angle sensing technology.