航天推进技术研究院主办
[1]杜飞平,谭永华,陈建华.基于ITD和STD的液体火箭发动机模态参数辨识方法[J].火箭推进,2012,38(03):34-39.
DU Fei-ping,TAN Yong-hua,CHEN Jian-hua.ITD and STD based identification for modal parameters of liquid rocket engine[J].Journal of Rocket Propulsion,2012,38(03):34-39.
点击复制
DU Fei-ping,TAN Yong-hua,CHEN Jian-hua.ITD and STD based identification for modal parameters of liquid rocket engine[J].Journal of Rocket Propulsion,2012,38(03):34-39.
基于ITD和STD的液体火箭发动机模态参数辨识方法
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
38
期数:
2012年03期
页码:
34-39
栏目:
研究与设计
出版日期:
2012-06-15
- Title:
- ITD and STD based identification for modal parameters of liquid rocket engine
- 文章编号:
- 1672-9374(2012)03-0034-06
- 分类号:
- V434-34
- 文献标志码:
- A
- 摘要:
- 在液体火箭发动机模态参数辨识领域，频域法仍是模态分析的主流方法，但该方法存在诸如功率泄露、频率混叠和离线分析等不足。本研究将基于时域识别的ITD法和STD法应用到液体火箭发动机模态参数辨识领域。由于这两种算法的基础是线性系统，利用Hilbert变换的方法，验证该发动机具有线性系统特征。与频域法对比的结果表明，该方法具有较高识别精度，且只使用实测响应信号，使用设备简单，因而可以在线分析，为发动机在工作环境下的参数识别奠定了基础。
- Abstract:
- In the field of the modal parameters identification of the liquid rocket engine, the frequency domain method is widely used. But this method has some shortcomings, such as power reveal, frequency mixture and off-line analysis. In this research, the ITD and STD methods based on time-domain identification were applied to this field. Since the two algorithms are based on the linear system, the Hilbert transform is used in this paper to verify that the engine has the characteristic of the linear systems. Compared with the frequency-domain method, the results show that the method has higher recognition accuracy, uses the measured response signals only, needs more simple equipments in the identification, and can conduct the online analysis. Thus it laid a foundation for the engine parameters identification in the working environment.
参考文献/References:
[1]黄道琼, 张继桐, 何洪庆. 四机并联发动机低频动态特性分析[J]. 火箭推进, 2004, 4(30): 28-31.
[2]张贵田. 高压补燃液氧煤油发动机[M]. 北京: 国防工业出版社, 2005.
[3]邹经湘, 于开平, 杨炳渊. 结构系统的时变参数识别方法[J]. 力学进展, 2000, 30(3): 370-377.
[4]Ibrahim S R, Mikulcik E C. A method for the direct identification of vibration parameters from the free response[J]. The Shock and Vibration Bulletin, 1977, 47(4):183-198.
相似文献/References:
[1]杜飞平,谭永华,陈建华,等.基于ARMA时序分析的液体火箭发动机模态参数辨识方法[J].火箭推进,2010,36(06):15.
DU Fei-ping,TAN Yong-hua,CHEN Jian-hua,et al.Identification for modal parameters of
liquid rocket engine based on ARMA time-sequence analysis[J].Journal of Rocket Propulsion,2010,36(03):15.
备注/Memo
收稿日期：2011-10-13；修回日期：2012-01-08
基金项目：中国航天科技集团公司支撑项目（2008JY05）
作者简介：杜飞平（1986—），男，硕士，研究领域为液体火箭发动机结构动态特性
更新日期/Last Update:
1900-01-01