Inertial Navigation System (INS) is an autonomous navigation system that does not rely on external information and does not radiate energy to the outside. Its working environment includes not only the air, the ground, but also underwater. The basic working principle of inertial navigation is based on Newton's law 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, the position in the navigation coordinate system can be obtained. Information such as speed, yaw angle and position.
An inertial navigation system (INS), also known as an inertial reference system, is an autonomous navigation system that does not rely on external information and does not radiate energy to the outside (like radio navigation). Its working environment includes not only the air, the 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, the position in the navigation coordinate system can be obtained. Information such as speed, yaw angle and position.
The inertial navigation system belongs to the reckoning navigation method, that is, the position of the next point is calculated from the position of a known point based on the continuously measured heading angle and speed of the moving body, so 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 measuring axis of the accelerometer is stabilized in the coordinate system, and the heading and attitude angle are given; the accelerometer is used to measure the acceleration of the moving body. The speed can be obtained by one integration, and the displacement can be obtained by one time integration of the speed.
Several modern navigation technologies are relatively common, including 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 the stars in the sky or receiving external signals. signal, its concealment is the best.
Inertial navigation is not as "unreliable" as everyone thinks. Many strategic and tactical weapons of the country, such as intercontinental civil aviation aircraft, must rely on inertial navigation systems or inertial navigation systems and other types of navigation. system combination. Its cost is also relatively expensive. A navigation-level inertial navigation system (that is, an error of 1 nautical mile per hour) costs at least hundreds of thousands, and a navigation system of this accuracy is enough to be equipped on an aircraft such as a Boeing 747. Now, with the advancement of mems (micro-electro-mechanical systems) inertial device technology, commercial-grade and consumer-grade inertial navigation has gradually entered the homes of ordinary people.
