A large-range and high-overload metal cylindrical resonant gyroscope for bombs

Abstract

The invention relates to a large number of high-overload cylindrical resonant gyroscopes used in bombs, which comprises a metal cylindrical resonator, a capacitance detection plate bracket is fixedly fixed on the inner coaxial center, and a capacitance detection plate is fixedly connected to the upper end of the capacitance detection plate bracket; There is an electromagnetic excitation seat fixedly connected below, and the outer part of the resonator is located above the electromagnetic excitation seat with an upper shell; an excitation head is arranged on the electromagnetic excitation seat, the upper part of the excitation head is sintered with the electromagnetic excitation seat, and the lower part of the excitation head is a bare part. The excitation coil is wound; a plurality of binding posts are sintered on the upper casing; the side wall of the resonator adopts a stepped structure, which is composed of two parts: a resonance ring and a vibration-guiding ring arranged up and down; the capacitance detection plate is sputtered along the circumference. The 8 electrodes evenly distributed in the direction are led to the terminals of the upper casing; the diameter of the inner ring of the electrodes is smaller than the diameter of the inner ring at the upper end of the resonant ring, and the diameter of the outer ring of the electrodes is larger than the diameter of the outer ring at the upper end of the resonant ring. The invention improves the range and the anti-overload performance of the metal cylindrical resonant gyroscope.

Description

technical field [0001] The invention belongs to the technical field of gyroscopes, and in particular relates to a large-range and high-overload metal cylindrical resonant gyroscope for bombs. Background technique [0002] Modern warfare puts forward stringent requirements on the precision strike capability of weapons, among which the precision guidance requirements of traditional strike weapons such as artillery shells are becoming more and more urgent. Due to the application characteristics of artillery shells, the gyroscopes required for angular velocity measurement must have low cost, strong overload resistance, large range (the typical overload capacity requirement is 20000g shock, and the range is 20 rev / s), high reliability, and speed. The resolution must also be as high as possible. [0003] Metal barrel-shaped resonant gyroscopes belong to the low-cost category of resonant gyroscopes. In recent years, they have developed rapidly. In addition to being used in the aer...

AI Technical Summary

Problems solved by technology

For this type of resonant gyroscope, the excitation method used has an important impact on the anti-overload performance of the gyroscope. For example, the piezoelectric ceramic excitation scheme is disclosed in the patent PCT / EP2011 / 068907. It is easy to know that the piezoelectric ceramic will be The weak link will have strong constraints on the anti-overload performance of the gyroscope; in addition, if the electrostatic excitation is used, it will also face the problems of low Q value of the metal resonator and low electrostatic excitation efficiency

[0004] For example, the classic structure of foreign patents adopts the piezoelectric ceramic scheme, because the piezoelectric ceramic is a brittle material, resulting in poor impact resistance; the piezoelectric ceramic structure usually adopts a force feedback control scheme, which is limited by the power supply voltage limit and the piezoelectricity of the piezoelectric ceramic. Inverse piezoelectric (such as d33) is limited, the range cannot be too high, and the resolution will be affected by reducing the amplitude

In order to improve the measurement range, the use of full-angle mode puts forward extremely high requirements on the consistency of piezoelectric ceramics. For the polarization of piezoelectric ceramics, the test selection poses a great challenge.

Images