Gyrocompass
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This document describes the components and working principle of a gyrocompass. A gyrocompass uses a gyroscope mounted on a set of gimbals to maintain its axis of rotation and always point towards geographic north. This allows ships and airplanes to navigate regardless of their motion or orientation. The document outlines the key parts of a gyrocompass including the gyroscope, gimbals, and transducers to measure pitch, roll and yaw. It also provides details on construction, specifications for sample components, advantages over magnetic compasses, and a total cost estimate of 1348 rupees to build a basic three-axis gyrocompass.
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Gyro compasses use north-seeking gyroscopes mounted on two gimbals to determine heading, relying on gyroscopic inertia, gravity, and precession. On ships, primary gyro compasses are oriented north-south for navigation and handling, while auxiliary gyros are east-west for combat systems. Gyro repeaters display heading information on the bridge and centerline, while gyro inputs are also used for command and control systems and weapons fire control computers. Gyro compasses are subject to inherent errors from factors like friction, ship motion, electronics, and power fluctuations that must be accounted for through adjustment.
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The document summarizes a gyro-theodolite, which uses a spinning gyroscope integrated with a theodolite to determine true north underground. It describes the main components, including the Wild GAK1 and more modern Gyromat 3000 suspended gyroscope systems. It provides details on operating and calibrating the gyro-theodolite, including running up the gyroscope, making observations of the moving shadow mark on the gyro scale, and equations to determine the midpoint of motion and calculate true north from the observations.
Gyroscope Ppt 1.pdf .
The document discusses gyroscopic effects that arise from rotating bodies changing their axis of rotation. It provides examples of gyroscopic couples in airplanes taking turns, ships rolling and steering, and automobiles rounding curves. The key effect discussed is that a gyroscopic couple is generated that can change the direction of angular velocity but not its magnitude. Several problems are also presented to calculate gyroscopic couples and analyze their effects in various rotating systems like aircraft engines, ship turbines, and vehicle wheels.
Theory of machine ii 012110050121-1
To verify the relation T = 2 Π √1/g for a simple pendulum experimentally.
Formula Used:
T = 2 Π √(L/g)
Where,
T = Time period of oscillation
L = Length of pendulum
g = Acceleration due to gravity
Procedure Of Experiment:
1. Suspend the pendulum bob with the help of a thread.
2. Adjust the length of the pendulum using the scale.
3. Displace the bob to one side and release it.
4. Note the time period for certain number of oscillations using a stopwatch.
5. Repeat the experiment for different lengths of the pendulum.
Gyrotheodolite
The document describes a gyro-theodolite, which is a north-seeking gyroscope integrated with a theodolite that can orient underground base lines to true north. There are two main types - the older Wild GAK1 from the 1960s-1970s which requires careful manual operation, and the more modern Gyromat 3000 which is more automated. The gyro-theodolite uses a suspended gyroscope attached to the theodolite to allow observations of true north azimuth rather than angle. It operates using the principle of a spinning gyroscope's resistance to change in orientation to determine the alignment to true north.
Compass lrg
This document provides information about gyro compasses and magnetic compasses used for navigation. It discusses how gyro compasses use a gyroscope to detect the Earth's rotation and define true north. It also describes how magnetic compasses can be affected by a ship's magnetism and factors like temperature, vibration, and electrical current. The document outlines procedures for compass checks and adjustments that may be needed after changes in magnetic latitude or modifications to a ship.
PRECESSION-UNIT 1.pptx
1. Gyroscopes are devices used to control the orientation and angular velocity of rotating bodies. They use the principle of gyroscopic precession to maintain their orientation.
2. Common applications of gyroscopes include their use in inertial navigation systems, gyrocompasses, and to provide stability in vehicles like ships, airplanes, bicycles, and motorcycles.
3. The reactive gyroscopic couple experienced by rotating objects like the engines of airplanes and ships helps provide stability when turning. For example, when an airplane turns left, the reactive couple presses down on the right wing and lifts the left wing, counteracting the turning moment.
cam design
This document discusses the mechanism of machinery and cam design. It begins by classifying followers based on their surface of contact and type of motion. It then discusses cam nomenclature and standard cam motions like uniform, modified uniform, and simple harmonic motion. The document provides examples of cam curve design, including the use of cycloidal motion. It also discusses velocity and acceleration analysis for tangent cams.
Unit 5-DOM.ppt
1. The document discusses gyroscopic effects in machines like airplanes, ships, and automobiles. It explains gyroscopic forces and torques, and how gyroscopes provide stabilization.
2. Governors and gyroscopes are presented as mechanisms for controlling machines. Centrifugal governors and their characteristics are described.
3. Specific topics covered include gyroscopic effects on airplanes during steering, ships during steering and pitching, and problems calculating gyroscopic couples in various machine conditions.
TSR161- Lifting The Lid on Gyros
This document discusses gyrostabilizers, which are devices used to reduce ship rolling through gyroscopic principles. It describes how gyrostabilizers work by using a spinning flywheel that creates stabilizing torque in response to ship rolling. The summary discusses key differences in gyrostabilizer designs, including whether they use natural or driven precession and active or passive precession control. It also summarizes the testing process and results for a VEEM Gyro 120 model, finding it can generate up to 120kNm of stabilizing torque and significantly reduce ship rolling. In conclusion, gyrostabilizers provide stabilization without appendages prone to damage, less noise, and easier installation compared to other stabilization methods.
ch05 dynamics of circular motion angular
This document summarizes key concepts about uniform circular motion including:
- Uniform circular motion involves constant speed but changing direction along a circular path.
- Centripetal acceleration is directed towards the center of the circle and results from a net centripetal force required to produce the acceleration.
- Banked curves use the horizontal component of the normal force as centripetal force, allowing vehicles to traverse the curve without slipping.
- Satellites in circular orbits around a planet or moon travel at a specific orbital speed required to maintain their fixed orbital radius due to the centripetal force provided by gravitational attraction.
Ge 105 lecture 4 (TRIANGULATION ADJUSTMENT) by: Broddett B. Abatayo
Ge 105 lecture 4 (TRIANGULATION ADJUSTMENT) by: Broddett B. AbatayoBPA ABATAYO Land Surveying Services
In the preparation for the Geodetic Engineering Licensure Examination, the BSGE students must memorized the fastest possible solution for the TRIANGULATION ADJUSTMENT using casio fx-991 es plus calculator technique in order to save time during the said examination. note: lec 2 and above wala akong nilagay na solution para hindi makupya techniques ko. just add me on fb para ituro ko sa inyo solution. Kasi itong solution ko wala sa google, youtube, calc tech books at hindi rin itinuro sa review center.Gyroscope JAA QUESTIONS
The document contains 30 multiple choice questions about gyroscopes and gyroscopic flight instruments. It asks about the functions of instruments like the rate-of-turn indicator, artificial horizon, directional gyro indicator, turn coordinator, and gyro-magnetic compass. It also contains questions about inertial navigation systems, gyro stabilization platforms, and sources of error for directional gyro indications.
Gyroscope.pptx 2.pptxfinal
- Gyroscopes work based on the principle of angular momentum to maintain orientation. A gyroscope is a spinning wheel or disk whose axis remains fixed in space despite external forces.
- Gyroscopic couples occur due to the vector representation of angular motion and cause precessional motion.
- On airplanes and ships, gyroscopic couples from rotating propellers and rotors help provide stability when turning or pitching and rolling in rough seas.
- On vehicles like motorcycles, the gyroscopic couples from the wheels and engine, along with centrifugal forces, help provide stability and prevent the vehicle from falling over when turning.
Gyroscopic couple
1. The document discusses gyroscopic couple, which acts on a spinning object that is rotating about another axis.
2. It provides examples of gyroscopic couple in naval ships, where the spinning of propeller shafts affects steering, pitching, and rolling.
3. The document also examines the gyroscopic couple and centrifugal couple in vehicles like cars and motorcycles taking turns, and how this affects their stability.
Rocker bogie mechanism
This document describes the design and fabrication of a rocker bogie mechanism. It provides details on the components, working principle, advantages, and applications of the rocker bogie suspension system. The rocker bogie allows vehicles to traverse rugged terrain by lifting each wheel over obstacles independently. It has been used successfully on NASA Mars rovers due to its ability to distribute weight evenly and climb obstacles twice the wheel diameter. The document outlines the process followed to design, build, and test a rocker bogie mechanism model.
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dtubbenhauer@gmail.com
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Gyrocompass
- 2. Introduction. Objective. Working principle. Purpose. Cost of production. Conclusion. Reference.
- 3. Gyrocompass is a type of non-magnetic compass. One important component of a gyrocompass is a gyroscope, but these are not the same devices.
- 4. To construct a Gyrocompass.
- 5. Gyrocompass consist of a spinning wheel mounted on gimbal so that the wheel's axis is free to orient itself in any way. When it is spun with its axis pointing in some direction, such a wheel will maintain its axis of rotation. A gimbal is constructed in such a way that no external torque acts on the axis of rotation of gyro.
- 8. a) For Navigation b) To Stabilize Airplane and Ship
- 9. For assisting navigation the axis of rotation of gyro is aligned to point towards the geographical north. Since no external torque acts on the axis of rotation the gyro will always point towards geographical north irrespective of the motion of ship
- 11. A Gyrocompass is mounted on Airplane or Ship. Variation in alignment of gimbal frame w.r.t axis of rotation of gyro is used judge the amount of pitch, roll and yaw experienced by Airplane or ship. The degree of pitch , yaw or roll experienced by the ship is measured and converted into electrical signal by a transducer which is then send to the pilot or captain of the ship.
- 13. Advantages: Disadvantages Seeks geographic (true) north instead of magnetic. Gimbal lock occur when two axis align parallel to each other. Can be used near the earth’s magnetic poles, where magnetic compass is useless. Requires a constant source of electrical power and is sensitive to power fluctuations. Unaffected by surrounding metals. Requires periodic maintenance by qualified technicians.
- 14. COMPONENT SPECIFICATIONS DISC a. DIAMETER = 178.8 mm. b. MASS = 1.5 kg. BALL BEARING a. DIAMETER = 19.5 mm. b. Nos. = 6 PIPE (G I) a. DIAMETER = 19.5 mm. b. LENGTH = 6 m.
- 15. Make a 3 axis gimbal and provide necessary joints to mount the gyro. Attach the gyro to the gimbal and provide sufficient rpm Align the gyro axis pointing a specific direction, say North. Test the instrument by providing torque on frames of gimbal.
- 18. For a rotating gyro with mass ‘M’ and radius ‘r’. Angular momentum is given by:퐿 = 푀 ∗ 푣 ∗ 푟 Where ‘푣’ is the tangential velocity of gyro. The value of angular momentum should be large enough to oppose any torque which the gyro experience due to self-weight.
- 19. Component Specification Cost (Rupees) Bearing 6.nos 300 Disc 1 100 G I Pipe 6meters 440 Nuts and Bolts 8.nos 30 Transportation 200 Paint 3 Bottles 278 TOTAL 1348
- 20. A 3-axis Gimbal gyrocompass is constructed and is tested for accuracy.
- 21. Gyrocompass - Wikipedia, the free encyclopedia Gimbal - Wikipedia, the free encyclopedia YOUTUBE: MIT Open Course Ware Lec. 24 | 8.01 Physics I: Classical Mechanics, Fall 1999