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Gyroscope is the basis of inertial guidance
Dec 19, 2018
The inertial navigation system has two types of implementation schemes: platform type and strapdown type: the former has a physical platform for tracking the navigation coordinate system, and the inertial instrument is installed on the platform. The acceleration and position information can be obtained by integrating the accelerometer signal, and the attitude information is obtained by the platform ring. The attitude angle sensor on the rack provides; the inertial navigation platform can isolate the carrier angular motion, thereby reducing the dynamic error, but has the disadvantages of large volume, low reliability, high cost, and inconvenient maintenance.

Gyroscope is the basis of inertial guidance

The strapdown inertial navigation system has no physical platform. The inertial instrument is directly connected to the carrier. The inertial platform function is realized by computer software. The attitude angle is calculated by calculation, also called “mathematical platform”.



Because the inertial instrument in the strapdown system has to bear the influence of the angular motion of the carrier, it requires a large dynamic range, a wide frequency band, and good environmental adaptability. The speed and capacity of the navigation computer are relatively high. The strapdown system has a compact and reliable structure. It has the advantages of high performance, light weight, small size, low power consumption, convenient maintenance, low cost, etc. It is also easy to integrate and integrate with other navigation systems or equipment, and has become the mainstream solution for the development of modern inertial system technology.


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