Fault detection for inertial measurement unit based on local approach
-
摘要: 介绍了局部方法(local approach)原理及其在随机系统故障诊断中的应用问题,讨论了用于故障诊断的样本数目对检测性能的影响,指出通过增加样本数目,可以大大增加局部方法检测小故障的能力,并说明样本数为1时,广义似然比(GLR,Generalized Likelihood Ratio)方法和局部方法的判决函数相同.为了验证所提出方法的有效性,将局部方法用于沿正十二面体对称侧面配置的冗余微机械惯性组件(IMU, Inertial Measurement Unit)故障检测,实验结果表明文中的理论分析是符合实际情况的.Abstract: The application of local approach for fault detection in stochastic dynamic systems was presented. It was demonstrated that the selection of samples numbers plays an important role in improving the performance of the local approach. And it was pointed out that by enlarging the number of samples, the ability of the technique to detect small fault will be enhanced significantly. It was shown that when the sample size n = 1, decision function of the generalized likelihood ratio (GLR) method is the same as that of the local approach. In order to illustrate the efficiency of the proposed method, the local approach was applied to detect fault of the redundancy micromechanical inertial measurement unit (IMU) with a dodecahedron configuration, and the experiment results confirm findings of the theory analysis.
-
Key words:
- fault tolerant systems /
- inertial navigation systems /
- local approach /
- GLR test
-
[1] 王社伟,张洪钺. 冗余配置捷联惯导系统故障检测门限的确定 . 航空学报,2000, 21(4):303-307 Wang Shewei, Zhang Hongyue. Fault detection threshold determination in a redundant strapdown inertial navigation system[J]. Acta Aeronautica et Astronautica Sinica, 2000, 21(4):303-307(in Chinese) [2] 魏春岭,张洪钺.多传感器斜置系统故障检测的奇偶向量补偿方法[J].北京航空航天大学学报,2001, 27(6):698-701 Wei Chunling, Zhang Hongyue. Parity vector compensation for multi-sensor fault detection[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(6):698-701(in Chinese) [3] Benveniste A, Basseville M, Georges V M. The asymptotic local approach to change detection and model validation[J]. IEEE Transactions on Automatic Control, 1987, AC-32(7):583-592 [4] Zhang Q, Basseville M, Benveniste A. Fault detection and isolation in nonlinear dynamic systems:a combined input-output and local approach[J]. Automatica, 1998, 34(11):1359-1373 [5] Xiong K, Chan C W, Zhang H Y. Unscented kalman filter for fault detection 16th IFAC World Congress. Prague:, 2005 [6] Zhang Q, Basseville M, Benveniste A. Early warning of slight changes in system[J]. Automatic, 1994, 30(1):95-113 [7] Huang B. Detection of abrupt changes of total least squares models and application in fault detection[J]. IEEE Transactions on Control Systems Technology, 2001, 9(2):357-367 [8] 李钦. 基于模型的故障诊断与容错控制系统研究 . 北京:北京航空航天大学自动化科学与电气工程学院,2005 Li Qin. Study on model-based fault diagnosis and fault tolerant systems . Beijing:School of Automation Science and Electrical Engineering,Beihang University of Aeronautics and Astronautics, 2005 -
点击查看大图
计量
- 文章访问数: 2591
- HTML全文浏览量: 154
- PDF下载量: 824
- 被引次数: 0
下载:
