Permanent magnet torquer for accelerometer

Abstract

The invention belongs to the technical field of flexible pendulous accelerometers, and particularly relates to a permanent magnet torquer based on a silicon-based coil for an inertial navigation accelerometer. The permanent magnet torquer for the accelerometer provided by the invention comprises a yoke, a permanent magnet, a magnetic conducting sheet and the silicon-based coil, wherein the yoke islocated at the most bottom, the permanent magnet is fixed on the yoke, and the magnetic conducting sheet is fixed on an upper surface of the permanent magnet. A permanent magnet air gap is formed between the yoke and the magnetic conducting sheet, the silicon-based coil is located in the permanent magnet air gap, and when the permanent magnet torquer is at work, the silicon-based coil is fixed onan accelerometer pendulum sheet through a coil cushion block. According to the permanent magnet torquer provided by the invention, an enameled wire wound coil of the permanent magnet torquer of the accelerometer is replaced by the silicon-based coil, thereby effectively reducing the thermal stress between the accelerometer pendulum sheet and the coil of the permanent magnet torquer, and meanwhilereducing the viscoelasticity of the coil. The silicon-based coil has better spatial stability in a permanent magnet magnetic circuit and can significantly improve the scale factor stability of the accelerometer.

Description

technical field [0001] The invention belongs to the technical field of flexible pendulum accelerometers, in particular to a silicon-based coil-based permanent magnetic torquer for inertial navigation accelerometers. Background technique [0002] The flexible accelerometer for inertial navigation is the core device in inertial navigation equipment, and the temperature and time repeatability of its zero position and scale factor directly affect the accuracy level of inertial navigation. With the continuous advancement of modern aerospace technology, the inertial navigation system has higher and higher requirements for the accelerometer, and the repeatability improvement of the accelerometer scale factor has become a technical bottleneck for the improvement of the accelerometer level. For the flexible pendulum accelerometer, the stability of its torque device is the key factor to determine the stability of the accelerometer scale factor. [0003] The torquer is composed of two...

AI Technical Summary

Problems solved by technology

The structure of the silicon-based coil is stable, but there are problems of short winding length and high coil resistance, and it is difficult to directly apply it to the torquer for the accelerometer

[0005] The torquer coil for the accelerometer is usually fixed on the pendulum of the accelerometer by gluing. This connection method has the problems of poor positioning consistency and large thermal stress. A spacer can be added between the coil and the pendulum to control the position of the coil and reduce the Small thermal stress, but the effect of this structure to reduce the thermal stress between the coil and the pendulum is still very limited

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