中国科学院机构知识库网格系统: 检索

Vibration and Reliability Analysis of Non-Uniform Composite Beam under Random Load 期刊论文 OAI收割
Applied Sciences (Switzerland), 2022, 卷号: 12, 期号: 5, 页码: 1-20
作者: Wang P(王鹏); Wu N(吴楠); Sun ZL (孙志礼); Luo HT(骆海涛)

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收藏 | 浏览/下载：36/0 | 提交时间：2022/03/31

Adomian decomposition method Composite beam Non-uniform beam Random load Reliability Vibration

Research on Flexible Structure of a Space Flight Prototype Doppler Asymmetric Spatial Heterodyne Interferometer 会议论文 OAI收割
Beijing, PEOPLES R CHINA, 2020-11-30
作者: Dang, Jianan; Sun, Jian; Feng, Yutao; Chang, Chenguang; Wu, Yang

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收藏 | 浏览/下载：30/0 | 提交时间：2021/06/21

Doppler Asymmetric Spatial Heterodyne interferometer Space Flight Prototype Flexible support structure Modal analysis Random vibration Acceleration overload

Reliability of Vibration Transfer Path Systems 会议论文 OAI收割
International Conference on Advanced Engineering and Technology (ICAET 2014), Incheon, South Korea, December 19-21, 2014
作者: Zhao W(赵薇); Chen P(陈平); Zhang YM(张义民)

收藏 | 浏览/下载：34/0 | 提交时间：2015/12/13

Random Parameters Reliability Transfer Path Vibration

Analysis on the influence of random vibration on MEMS gyro precision and error compensation (EI CONFERENCE) 会议论文 OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者: Li M.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

In order to improve its precision in dynamic environment a Kalman filter was designed. Firstly two sets of random drift data of MEMS gyro were respectively analysed and it was found that the variance of random drift under random vibration significantly increased and its mean also changed. Then calculation results show that attitude angle error under random vibration is 2.6 while in the static test it is 0.25. Analysis on the characteristics of random drift was carried out and it is found that it can be treated as stable normally distributed random signal. Finally a corresponding Kalman filter was designed. The results indicated that after filtering the variance of random drift is reduced to 0.0282 26.4% of pre-filtering and the attitude angle error is reduced to 1.5 57.7% of pre-filtering. The above method can effectively compensate for the attitude angle error of MEMS gyro caused by random vibration. This study can be a reference to the application of low-cost MEMS gyro in aircraft navigation. (2012) Trans Tech Publications Switzerland.

Structure Improvement and Mechanical Analysis on Data Transmission Antenna 会议论文 OAI收割
International Conference on Frontiers of Mechanical Engineering and Materials Engineering (MEME 2012), Hong Kong, PEOPLES R CHINA, JUL 27-29, 2012
作者: Fan, Wenjie; Li, Ning

收藏 | 浏览/下载：25/0 | 提交时间：2014/12/15

antenna mechanical analysis FEM random vibration

Random vibration analysis on the support of strapdown inertial navigation system (EI CONFERENCE) 会议论文 OAI收割
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
作者: Li M.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

Vibration of the support is an important factor to the accuracy of strapdown inertial navigation. To get vibration characteristics of the support FEM model of the support was created with Ansys and then response characteristics were analyzed on the support under the separated random loads during carrier flight including the phases of subsonic and subsonic. To validate the analysis method wide band random vibration test was done on the points of the support which are used for mounting inertial instruments. The comparison of the analysis and the test data shows that the relative error of analysis result is not more than 13%. According to the two results the support structure was improved. Finally random vibration analysis was carried out on the improved one. The result shows that the acceleration response was largely reduced than before. This research can be a reference of performance improvement of the strapdown inertial support and navigation system precision. 2011 IEEE.

Structure optimization of strap-down inertial navigation system support (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Wang J.; Sun H.; Sun H.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

In order to meet the requirement of inertial navigation components and minimizing the system's weight and topological optimization was conducted. Then topological optimization and size optimization were conducted under conditions of random vibration and impact. Firstly according to the dynamic characteristics of missile and requirement of inertial navigation system the structure of inertial navigation support was designed according to types of missile connection and space arrangement of electronic components the method of transforming multi-loading cases to multi-loading constraints was used to optimizing the size of the support under conditions of random vibration and impact. Comparing to the original support structures RMS accelerations in installed points reduced by 25.2% under random vibration the weight of optimal structures reduced by 28.1% the structures also met the requirement of inertial navigation system under condition of impact. The support structure shows improvements in both dynamic characteristic and light weight comparing with the original one. 2011 IEEE.

Design of stable image platform on airborne camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

Modulation transfer function resulting from random vibration was analyzed. To conclude that the effect of angular displacement was the major factor. Allowable MTF degradation was represented and 34dB reduction was achieved at frequency of 100HZ. With the help of MSC.ADAMS simulation software and convert allowable MTF degradation into stable system design parameters simulated curve proves correct for isolator which can guide perfect design for stabilization system. Based on the spatial mechanism and translational principle of parallelogram and the irrotational displacement mechanism was tested by optical method an irrotational displacement isolator was developed. It can meet the requirements of irrotational displacement and damp. An instance was given coupled angle is less than 8? it can satisfy the demand of aerial imaging. (2011) Trans Tech Publications.

Vibration reliability sensitivity analysis of general system with correlation failure modes 期刊论文 OAI收割
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, 2011, 卷号: 25, 期号: 12, 页码: 3123-3133
作者: Su ZQ(苏长青); Zhang YM(张义民); Zhao QC(赵群超)

收藏 | 浏览/下载：29/0 | 提交时间：2012/05/29

General system Random perturbation Vibration reliability Vibration reliability sensitivity Correlation failure modes

Optimal design of strap-down inertial navigation support under random loads (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
作者: Li M.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In order to realize miniaturization and light weight of the strap-down inertial navigation system and then to make sure that it works well under random loads optimal design is applied to the strap-down inertial navigation support with the methods of topology optimization and size optimization. Firstly based on the installation requirement of devices and connection requirement of the support and the carrier the initial structure of the support is designed. Topology optimization with FEA software ANSYS is adopted on the initial structure to get the basic one. Then 5 critical sizes are chosen as design variables and the support structure is optimized by means of size optimization to reach light weight with satisfying the requirement of dynamic stiffness. Finally random vibration analysis is applied to the initial structure. In the mean time random vibration test is carried out to qualify the analysis method. After the qualification a random vibration analysis is applied to the optimized support structure to get the rms of displacement response and acceleration response of the support to validate whether the optimized structure is appropriate. The results indicate that the dynamic stiffness of the optimized support structure satisfies the design requirements and its weight is lighter 49.38% than that of the initial one. This research can be a reference to the structure design of supports under random loads and the result has been applied to the development and manufacture of a prototype aerocraft. 2010 IEEE.