What Is Strapdown Inertial Navigation System?

The Strapdown Inertial Navigation System (SINS) was developed on the platform-based inertial navigation system. It is a frameless system consisting of three rate gyros, three line accelerometers and a microcomputer. The Gyro and accelerometer of Strapdown Inertial Navigation System are directly attached to the carrier as a measurement standard. The difference between it and the platform-based inertial navigation system is that it no longer consists of an electromechanical platform, but a mathematical platform is established in the computer. Obtained by computer.

(1) The strapdown inertial navigation system is a frameless autonomous navigation system that does not rely on external information at work, does not radiate energy to the outside world, and is not easily damaged.

(2) The mechanical platform is omitted, and the gyroscope and accelerometer are directly mounted on the aircraft, so that the system is small in size, light in weight, low in cost, and convenient to maintain. However, gyroscopes and accelerometers directly withstand the vibration, shock and angular motion of the aircraft, thus creating additional dynamic errors. This has higher requirements for gyroscopes and accelerometers.

(3) After the instrument measures the signal, it must be calculated by the computer to get the required navigation parameters. Such a system requires coordinate transformation and must be calculated in real time, thus requiring a computer with high computational speed and large capacity.

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