High-dynamic inertial measurement unit

Abstract

The invention discloses a novel high-dynamic inertial measurement unit. The high-dynamic inertial measurement unit can be applicable to a high-dynamic heavy-overload working environment and is small in volume, high in reliability and strong in shock resistance. According to the invention, when an angular rate gyroscope is arranged, the sensitive structures are not vertically distributed two by two, instead, an oblique crossing distribution manner is adopted to enable the sensing structures of two gyroscopes for measuring the non-axial angular rate of IMU to form an angle of 20 degrees with theaxial direction. Such a distribution manner can give full play to the characteristic of relatively strong axial shock resistance of the sensing structures of the gyroscope, so that the inertial measurement unit has strong longitudinal shock resistance capability, and the accuracy of non-axial angular movement measurement is ensured, thus being adapted to a heavy-overload working environment suchas guided cartridge.

Description

technical field [0001] The invention relates to the technical field of inertial navigation and guidance, in particular to a novel high dynamic inertial measurement unit. Background technique [0002] With the advancement of information technology and the development of war concepts, a large number of precision-guided munitions are widely used in modern warfare, which doubles the damage efficiency of weapons. The emergence of new types of smart bullets like guided shells is also in line with the development trend of information warfare. There is no special launch platform for guided shells, and conventional artillery can be used to launch them. The projectile is guided through the guidance assembly during flight until the projectile hits the target. Compared with precision-guided weapons such as missiles, the launching platform of guided projectiles is simple, and the cost is low and the hit accuracy is high. [0003] The current guided shells are based on terminal guidanc...

AI Technical Summary

Problems solved by technology

However, since the sensitive structure is supported by a support rod, the single lateral overload resistance capacity is only about 6000g (maximum stress 431MPa)

For general inertial measurement units, the arrangement direction of the three gyro sensitive axes is perpendicular to each other. This arrangement is limited by the horizontal impact resistance of the horizontally arranged gyroscope, that is, the symmetry axes of the two gyroscope vibrators will be in contact with the axial direction of the inertial measurement unit. Vertical, so that the longitudinal overload of the entire inertial measurement unit cannot exceed 6000g, so that the anti-high overload characteristics of this gyroscope cannot be fully utilized

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