Multi-field coupling based vibratory stress relief simulating method for accelerometers

A technology of accelerometer and simulation method, applied in calculation, special data processing application, instrument, etc.

Active Publication Date: 2012-07-04
厦门蓝威可靠性系统工程研究院有限公司
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Problems solved by technology

Through the novelty search and retrieval of existing technologies, no research has been carried out at home and abroad on the simulation of the vibration aging process using quartz flexible accelerometers

Method used

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  • Multi-field coupling based vibratory stress relief simulating method for accelerometers
  • Multi-field coupling based vibratory stress relief simulating method for accelerometers
  • Multi-field coupling based vibratory stress relief simulating method for accelerometers

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] The following examples are as follows figure 1 The implementation of the process shown mainly includes the use of ANSYS software to simulate the laser welding process; simulate the process of natural cooling and retain residual stress; apply vibration stress and simulate the effect of VSR on eliminating residual stress. The structural composition of the welding part of the accelerometer is as follows: figure 2 As shown, it is mainly composed of soft magnets 1, 3 and preload ring 2.

[0045] See figure 1 , the present invention is based on a multi-field coupling accelerometer vibration aging simulation method, the specific steps of the method are as follows:

[0046] Step 1: Laser welding process simulation, mainly including

[0047] a. Select the finite element element, select the thermal structure coupling element according to the...

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Abstract

A multi-field coupling based vibratory stress relief simulating method for accelerometers includes three steps: the first step, simulating laser welding process; the second step, cooling naturally, reserving residual stress, keeping a model constant, removing heat flux density load, simulating natural cooling process and coupling transient state of a heat structure; and the third step, applying vibration stress and simulating time domain dynamics. By finite element coupling simulation of multiple physical fields of heat, structures and vibration and the like, distribution states of the residual stress after VSR (vibratory stress relief) are acquired. On one hand, the multi-field coupling based vibratory stress relief simulating method is used for evaluating removing effect of the residualstress of the VSR, on the other hand, by comparing affections on residual stress removal from different vibration stress, the optimum VSR vibration section is found, and accordingly stability and navigation accuracy of the accelerometers are improved. Besides, the multi-field coupling based vibratory stress relief simulating method can be applied in the technical fields of aeronautics and astronautics and finite element simulation and has excellent application prospect.

Description

technical field [0001] The invention relates to an accelerometer vibration time-effect simulation method, in particular to a multi-field coupling-based accelerometer vibration time-effect simulation method, which belongs to the technical field of finite element simulation. Background technique [0002] An accelerometer is a sensor device that converts the acceleration of a moving object into an electrical signal through various measurement methods. Quartz flexible accelerometers are small in size, fast in response and high in sensitivity, and have been widely used in many fields such as precision guidance and aerospace. However, the parameter drift of the quartz flexible accelerometer will occur during use, which has a great impact on the navigation accuracy. [0003] At present, the research on parameter drift of quartz flexible accelerometers mostly focuses on drift error modeling and compensation technology. These methods do not analyze the mechanism of parameter drift, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈颖刘丙栋侯泽兵康锐
Owner 厦门蓝威可靠性系统工程研究院有限公司
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