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Gyroscopes

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A short introduction on the device GYROSCOPE and a brief description on its properties, history, applications, types and future work.
Source:-
1. Theory of Machines by R.S.Khurmi and J.K.Gupta
2. www.google.co.in
2. www.wikipedia.org

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Gyroscopes

  1. 1. Name-Aditya Bose Roll No.-SG-13901 Branch-B.E.(Mechanical) E-Mail ID-bose.aditya95@gmail.com
  2. 2. Contents  Gyroscope  Properties of Gyroscopes  History of Gyroscopes  Applications of Gyroscopes  Types of Gyroscopes available  Future Work
  3. 3. Gyroscope WHAT IS A GYROSCOPE? DEFINITION : A gyroscope is a device for measuring or maintaining orientation, based on the principles of conservation of angular momentum.
  4. 4. PROPERTIES OF GYROSCOPES Gyroscopes have two basic properties: Rigidity and Precession These properties are defined as follows: 1. RIGIDITY: The axis of rotation (spin axis) of the gyro wheel tends to remain in a fixed direction in space if no force is applied to it. 2. PRECESSION: The axis of rotation has a tendency to turn at a right angle to the direction of an applied force
  5. 5. History of Gyroscopes  1817. Johann Bohnenberger created the first know gyroscope, calling it simply the “machine”.  1820. Pierre-Simon Laplace recommended the “machine” be used as a teaching aide.  1852. Leon Foucault coins the name “gyroscope” when he uses Bohnenberger’s “machine” in an experiment involving the earth’s rotation.  1905 – 1908. The first gyroscope for marine navigation was developed by German inventor Hermann Anschutz- Kaempfe.
  6. 6. History of Gyroscopes (Contd.)  1917. The “Chandler gyroscope” toy was invented by the Chandler Company in Indiana. It is still considered a classic American toy.  During World War II, the gyroscope became the prime component for aircraft and anti-aircraft gun sights.  1991. Charles Stark Draper Laboratory demonstrated one of the first MEMS or “Vibratory” gyroscopes fabricated in silicon.
  7. 7. Applications of Gyroscopes A. In Aeronautics and Aviation:- 1. Remote control flying devices, helicopters, some hovercraft, some planes, etc. rely on gyroscopes to prevent them from flipping over or going into a spin.
  8. 8. Applications of Gyroscopes (Contd.) 2. Spacecraft rely on gyroscopes for orientation while in space. 3. Aircraft and aircraft autopilots rely on gyroscopes to account for changes in direction & altitude
  9. 9. Applications of Gyroscopes (Contd.) B. In Naval field 1. Gyroscope are used in ships to maintain stability as the effect of gyroscopic couple is on:- (a.) Steering (b.) Pitching (c.) Rolling
  10. 10. Application of Gyroscopes (Contd.) C. In automobiles 1. Gyroscopic behaviour is used in the racing car industry. This is because car engines act just like big gyroscopes. Because of the of the gyroscopic forces from the engine depending on whether the engine is spinning clockwise or anti-clockwise the cars nose will be forced up or down.
  11. 11. Application of Gyroscope (Contd.)
  12. 12. Applications of Gyroscopes (Contd.) 2. Wheels on motorbikes act as gyroscopes and make the bike easier to balance (stay up right) when moving.
  13. 13. Applications of Gyroscopes (Contd.) D. In toys and everyday uses 1.Gyroscopes are used in various toys such as yo-yos and Frisbees. Some other toy products are Gravitron and ChikyuGoma.
  14. 14. Applications of Gyroscopes (Contd.) E. In electronics and gadgets 1. Gyroscopes are used in various fields nowadays such as in smartphones, video game controllers, computer mouses and presentation mouses.
  15. 15. Applications of Gyroscopes (Contd.)
  16. 16. Types of Gyroscopes available  Spinning Mass Gyro  Mass spins steadily within the gyro with free movables axis (gimbals).  Optical Gyroscope  Laser rays reflect many times within an enclosure, any changes in orientation will be registered as changes between the moment of the laser emittance to eventual reception.  Vibrating Gyroscope  Determines rate of turn by a vibrating resonator and its change in vibrations from the original vibrating direction.  Gas Rate Gyro  Sprays gas on heated coils, when a change in direction occurs the spray is curved resulting in a change in the temperature of the coils. (Currently unpractical because of the numerous factors involved
  17. 17. Types of Gyroscopes available (Contd.)  Mechanical Gyroscope A mechanical gyroscope is essentially a spinning wheel or disk whose axle is free to take any orientation. This orientation changes much less in response to a given external torque than it would without the large angular momentum associated with the gyroscope's high rate of spin.
  18. 18. Types of Gyroscopes (Contd.)
  19. 19. Types of Gyroscopes (Contd.)
  20. 20. Future Work  Most development being done in gyroscopes as sensors is focused on reducing the size and improving the precision of MEMS gyroscopes.  Much of this research is fueled by DARPA, U.S. Department of Defense and the U.S. military.  DRDO, Ministry of Defence, Government of India and Indian military is working hard in this field to invent new weapon systems and equipments equipped with gyroscopes.  Draper Laboratory is teaming up with NASA, MIT and others to take on the challenge of making it easier for astronauts to move through space both inside and outside a spacecraft. Their work centers around incorporating control moment gyroscopes (CMGs) into astronauts’ space suits and jetpacks.
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A short introduction on the device GYROSCOPE and a brief description on its properties, history, applications, types and future work. Source:- 1. Theory of Machines by R.S.Khurmi and J.K.Gupta 2. www.google.co.in 2. www.wikipedia.org

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