Tool and method for adjusting mounting accuracy of flexible pendulous accelerometer
An accelerometer and installation accuracy technology, which is applied in the direction of acceleration measurement, transportation and packaging, space navigation equipment, etc. by using inertial force, can solve the problems of accelerometer base deformation, long platform assembly cycle, large adjustment error, etc., to ensure Installation accuracy and bias value stability, preventing unstable factors, and high adjustment efficiency
Active Publication Date: 2015-07-08
北京航天兴华科技有限公司
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Problems solved by technology
In this method, due to the grinding and removal of the three adjusting shims, the installation accuracy of the accelerometer after repeated adjustments is still difficult to meet the final requirements. Moreover, the planes formed by the three adjusting shims after adjustment are not coplanar. When the accelerometer is combined with When the three adjusting shims are installed on the reference surface of the table body under a certain fastening force, there will be a small gap between the adjusting shims with smaller thickness and the reference surface of the table body, which will cause deformation of the accelerometer base, and finally affect the accelerometer’s performance. bias stability
The traditional method of adjusting the installation accuracy of the accelerometer is complicated and the adjustment error is large, resulting in a long platform assembly cycle and a low pass rate
Method used
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[0031] A tool for adjusting the installation accuracy of a flexible pendulum accelerometer, the tool includes a grinding base 1, a positioning ring 2 and three positioning pins 3; the grinding base 1 and the positioning ring 2 have the same outer diameter, and the center is used for The diameter of the weight-reducing part is also consistent;
[0032] The grinding base 1 is a hollow cylinder; three positioning pin holes 5 are evenly distributed on the cylinder, and there is an annular rubber groove 6 on the upper surface of the cylinder;
[0033] The positioning ring 2 is a hollow ring; there is an annular boss 7 at the bottom of the ring, and three through holes 8 are evenly distributed on the ring; the through holes 8 coincide with the center of the positioning pin hole 5 one by one; the boss 7 for positioning;
[0034] The positioning ring 2 is located on the grinding base 1, the boss 7 of the positioning ring 2 is matched with the glue groove 6 of the grinding base 1, and...
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The invention relates to a tool and a method for adjusting the mounting accuracy of a flexible pendulous accelerometer, and belongs to the technical field of mounting of accelerometers. Three independent gaskets are accurately combined to form a whole body, and are uniformly ground, the requirement on the mounting accuracy of the accelerometer is achieved, a plane formed by the three machined adjusting gaskets can be coplanar precisely, a base can be well adhered to a mounting surface after the accelerometer is mounted, and the factor of instability of bias items of the accelerometer due to deformation of the base is effectively prevented. The method is easy to operate and high in adjusting efficiency; and the mounting accuracy and the bias stability of the flexible accelerometer can be simultaneously guaranteed.
Description
technical field [0001] The invention relates to a tool for adjusting the installation accuracy of a flexible pendulum accelerometer and an adjustment method, belonging to the technical field of accelerometer installation. Background technique [0002] The flexible pendulum accelerometer is widely used in the inertial instrument of the Long March series of launch vehicles. It can accurately and sensitively measure the acceleration of the launch vehicle flight, which is the basis for its inertial navigation and inertial guidance. Accuracy and stability are the keys to accurate and sensitive flexible pendulum accelerometers to measure rocket flight acceleration. [0003] When an accelerometer is used in an inertial navigation system to measure the acceleration of an axis, its position must be highly accurate. However, due to the existence of part processing and component assembly errors, there will always be a certain installation error angle between the actual sensitive axis ...
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IPC IPC(8): B64G1/66G01P15/13
Inventor 张格宁姚竹贤刘金龙
Owner 北京航天兴华科技有限公司