Broadband angular vibration exciting device

Abstract

The invention discloses a broadband angular vibration exciting device, which comprises a rigid base, wherein the rigid base is fixedly connected with a vibration exciter and a soft suspension; the soft suspension is fixedly connected with a square testing piece; the square testing piece is connected with the vibration exciter; an angular accelerometer is arranged on the square testing piece, and is connected with a vibration control instrument; the vibration control instrument is connected with a power amplifier; the power amplifier is connected with the vibration exciter; the vibration exciter is connected with a control computer; the vibrator control instrument is used for controlling vibration; the angular accelerometer is used for measuring and monitoring an angular vibration environment; the vibration control instrument is used for computing according to a feedback signal of the angular accelerometer to obtain an output signal; the output signal is used for driving the vibration exciter to excite the square testing piece after being amplified by using the power amplifier; and the control computer is used for monitoring and controlling the angular vibration situation in real time. The broadband angular vibration exciting device has the characteristics of high accuracy and capability of realizing angular vibration exciting on wide frequency bands.

Description

technical field [0001] The invention relates to an angular vibration excitation device, in particular to a device for angular vibration excitation in a wide frequency band. Background technique [0002] Angular vibration testing is an important part of the field of vibration testing. For imaging sensors (including cameras), the imaging quality is mainly affected by angular vibration, so angular vibration testing has become an indispensable part of verifying the imaging quality of imaging sensors in vibration environments. [0003] At present, there are two types of methods for angular vibration testing. One is to conduct full-system testing, that is, to complete the debugging and assembly of the entire system, install the structural boundary conditions according to the working state, and turn on all vibration sources to create the angular vibration of the imaging sensor when it is working. At this time, the imaging quality of the imaging sensor is tested; the other is the a...

AI Technical Summary

Problems solved by technology

Obviously, the first type of method (full system test) is expensive and has a long cycle, and cannot test and verify the imaging quality of the imaging sensor in the early stage of development

Sometimes subject to ground test conditions, it is impossible to conduct accurate full-system tests, such as aircraft, satellites, etc.

Another type of angular vibration simulation test has the advantages of short cycle, low cost, and iterative design of imaging sensors in the early stage of development. High-degree vibration table, the frequency band of these devices for angular vibration excitation is relatively limited, and it is impossible to realize wide-frequency angular vibration excitation

This limits the application of angular vibration simulation tests

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