The hand spinner instrument was first used for navigation, but with the development of science and technology, it has been widely used in aviation and aerospace industry. Hand spinner not only can be used as an indicator, but more importantly, it can be used as a sensitive component of the automatic control system, can be used as a signal sensor. According to the needs of hand spinner instrument can provide accurate position, level, position, velocity and acceleration.
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The driver or navigator to control the aircraft, ship or aircraft vehicle according to certain flight routes, and in the guidance of missile and satellite launch vehicle or space exploration rocket vehicle, then the direct use of these signals control the attitude and orbit control of vehicle.
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