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What Is Inertial Navigation?

Dec 04, 2019

Inertial navigation A technology that obtains the instantaneous speed and position data of an aircraft by measuring the acceleration of the aircraft and automatically performing integration operations. The devices that make up the inertial navigation system are installed in the carrier, and do not rely on external information or radiate energy to the outside when working, and are not easily interfered. It is an autonomous navigation system.


The inertial element (accelerometer) is used to measure the acceleration of the carrier itself, and the speed and position are obtained through integration and operation, so as to achieve the purpose of navigation and positioning of the carrier. The devices that make up the inertial navigation system are installed in the carrier, and do not rely on external information or radiate energy to the outside when working, and are not easily interfered. It is an autonomous navigation system. Inertial navigation systems usually consist of inertial measurement devices, computers, control displays, and so on. The inertial measurement device includes an accelerometer and a gyroscope, also called an inertial measurement unit. Three degrees of freedom gyroscopes are used to measure the three rotational movements of the carrier; three accelerometers are used to measure the acceleration of the three translational movements of the carrier. The computer calculates the speed and position data of the carrier based on the measured acceleration signals. Control the display to show various navigation parameters. According to the installation mode of the inertial measurement unit on the carrier, it is divided into a platform type inertial navigation system (the inertial measurement unit is installed on the platform of the inertial platform) and a strapdown inertial navigation system (the inertial measurement unit is directly installed on the carrier) ; The latter eliminates the platform, the instrument working conditions are poor (affecting accuracy), and the calculation workload is large.

FOG Inertial Navigation System

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