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A Method for Analyzing and Suppressing Rotor Vibration Noise of Active Semi-Strapdown Inertial Measurement System

An inertial measurement and rotor vibration technology, which is used in weapon accessories, ammunition testing, ammunition and other directions, can solve problems such as the reduction of measurement accuracy, and achieve the effect of improving measurement accuracy, improving attitude calculation accuracy, and solving the reduction of measurement accuracy.

Active Publication Date: 2017-11-21
ZHONGBEI UNIV
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Problems solved by technology

[0003] In order to solve the problem that the measurement accuracy of the active semi-strapdown inertial measurement system is reduced due to the vibration noise of the rotor, the present invention provides an analysis and suppression method for the rotor vibration noise of the active semi-strapdown inertial measurement system

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Embodiment Construction

[0016] A method for analyzing and suppressing rotor vibration and noise of an active semi-strapdown inertial measurement system, the method is realized by the following steps:

[0017] Step S1: When the active semi-strapdown inertial measurement system is running, use the hardware circuit to collect the specific force data output by the system's Y-axis accelerometer, the specific force data output by the Z-axis accelerometer, and the relative rotation angle data output by the photoelectric encoder ;

[0018] Step S2: Differentiate the relative rotation angle data output by the photoelectric encoder, thereby obtaining the motor speed data of the system;

[0019] Step S3: Set the initial time interval to 1s, and segment the motor speed data with the initial time interval, thereby obtaining several motor speed data segments; then adjust the time interval until the maximum motor speed in each motor speed data segment is less than twice the minimum motor speed, record the data poi...

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Abstract

The invention relates to an active semi-strapdown inertial measuring system, in particular to a method for analyzing and inhibiting vibration noises of a rotor of an active semi-strapdown inertial measuring system. The problem that measuring precision of an active semi-strapdown inertial measuring system is reduced due to vibration noises of a rotor is solved. The method for analyzing and inhibiting vibration noises of the rotor of the active semi-strapdown inertial measuring system comprises the following steps: step S1, respectively acquiring specific force data output from a Y-axis accelerometer of the system, specific force data output from a Z-axis accelerometer and a relative rotation angle data output from a photoelectric encoder; step S2, differentiating the relative rotation angle data output from the photoelectric encoder; step S3, segmenting revolving speed data of a motor; step S4, segmenting the specific force data; step S5, carrying out low-pass filtering on various specific force data fragments; and step S6, splicing the various specific force data fragments. The method for analyzing and inhibiting vibration noises of the rotor of the active semi-strapdown inertial measuring system is suitable for the active semi-strapdown inertial measuring system.

Description

technical field [0001] The invention relates to an active semi-strapdown inertial measurement system, in particular to a method for analyzing and suppressing rotor vibration and noise of an active semi-strapdown inertial measurement system. Background technique [0002] The active semi-strapdown inertial measurement system is a system for measuring the attitude of high-spin ammunition, which is widely used in the testing of conventional high-spin ammunition (see Chinese patent ZL 201110025530.8). When manufacturing the active semi-strapdown inertial measurement system, due to machining and installation errors, the rotor of the system is prone to misalignment, which leads to the following problems: when the system is running, due to the high-speed rotation of the projectile, the rotor’s Misalignment will cause the rotor to generate vibration noise in the radial direction (the manifestation of radial vibration noise is: it is composed of white noise and the second harmonic who...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B35/00
CPCF42B35/00
Inventor 秦丽张樨李杰张晓明申冲兰洋刘一鸣李文豪
Owner ZHONGBEI UNIV
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