RLG SIGMA 40 is based on Ring Laser Gyroscope technology. RLG is a type of gyroscope based on the principles of interferometry and the Sagnac effect, which is a relativistic phenomenon in the theory of electromagnetic fields. In this article, we learn details about RLG SIGMA 40, its features, core aim, and the units.
gyroscope
Effect of Earth Rotation on Gyro – At Equator and Pole
This post will discuss the effect of Earth rotation on Gyro at different locations on Earth viz. equator and pole when observed from space and Earth.
What is Gyroscope – History, Three Degrees of Freedom, Basic Properties
This post will discuss what is Gyroscope, its history, three Degrees of freedom in gyroscope and basic properties ‘Rigidity in Space’ & ‘Rule of Precision’.
Path traced by Gyroscope
The path traced by Gyroscope is elliptical in nature and is finally settled towards the meridian. Lets find out how. Path traced by north end of Gyroscope The north end of the Gyro spin axis initially points at some point X, which is above the Earth’s horizontal and a bit east of the actual meridian. […]
Ring Laser Gyro
The Ring laser gyro (RLG) functions in the following way : The laser generates a very coherent beam of light. This concludes that since the source is same, the generated photons are at one specific frequency. The beam is split into two beams that travel the same path but in opposite directions: one clockwise and […]
Conversion from free Gyro to Gyroscope
Till now we have learned about the free gyro. Now, We will learn how to restrict the free Gyro from drifting and tilting. To do so, We need to address certain issues which plays a significant role in converting a free Gyro to a Gyro Compass. They are : 1º of freedom has to be […]
Damped Oscillation
The process of producing damped oscillation of Gyro and its various phases are as follows: By adding an additional weight to the lower part of the Gyro sphere, We can provide it the pendulum effect. This is done by placing a damper (with two pots, one at each end of the damper) partially filled with […]
Strapdown System
Lightweight digital computers permit the system to eliminate the gimbals, creating strapdown system, and are called so because their sensors are simply strapped to the vehicle. In a strapdown inertial navigation system the accelerometers are rigidly mounted parallel to the body axes of the vehicle. In this type of system, the gyroscopes do not provide […]
Displacement type Accelerometer
Displacement type Accelerometer As in the case of normal navigation systems, The Inertial Navigation system is not dependent on the external fields or forces. In place of that, an Inertial Navigation system always keeps on tracking its location by precise measurement of the acceleration and its rotary motion it is sensing. The acceleration is measured […]
Settling Period of Gyro
In our earlier posts, we discussed about the free gyro, Gyroscope conversion and its damped/undamped oscillations. In this post, we will discuss about Settling period of Gyro. When the compass is settled, the spin axis has a constant tilt. The delaying action of the damping arrangement will therefore have no effect as there is no […]
Undamped Oscillation of Gyro
In our earlier posts, we discussed about the free gyro, Gyroscope conversion, damped oscillation and its settling period. In this post, we will discuss about undamped oscillation of Gyro. The free gyro does not contain any instrument which may be called a compass. The direction of the spin axis relative to the earth’s’ surface continually […]
Sagnac Effect
Sagnac effect : The Difference in path Length (∆L) is directional proportional to Angular Rotation (ω). When course is steady:- Path traveled by F1=2πR Path traveled by F2=2πR When Course changes:- Path traveled by F1= 2πR+AB Path traveled by F2= 2πR – AB Difference in Path Length i.e. ∆L = 2AB or ∆L = 2RӨ (Since […]