How Does Inertial Navigation System Work?

Inertial Navigation System (INS), also known as inertial reference system, is an autonomous navigation system that does not rely on external information and does not radiate energy externally (such as radio navigation). Its working environment includes not only air, ground, but also underwater. The basic working principle of inertial navigation is based on Newton’s laws of mechanics. By measuring the acceleration of the carrier in the inertial reference system, integrating it with time and transforming it into the navigation coordinate system, it can be obtained in the navigation coordinate system. Information such as speed, yaw angle and position.

The inertial navigation system belongs to the inferred navigation mode, that is, the position of the next point is calculated from the position of a known point according to the continuously measured moving body heading angle and speed, so that the current position of the moving body can be continuously measured. The gyroscope in the inertial navigation system is used to form a navigation coordinate system, so that the measurement axis of the accelerometer is stabilized in the coordinate system, and the heading and attitude angles are given; the accelerometer is used to measure the acceleration of the moving body, after the time one point gives the speed, and the speed is then integrated by one time to get the displacement.

Some of the more common navigation technologies in modern times include astronomical navigation, inertial navigation, satellite navigation, radio navigation, etc. Among them, only inertial navigation is autonomous, neither radiating things to the outside world, nor looking at stars in the sky or receiving external The signal, its concealment is the best.

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