A Study on Fault Diagnosis of Redundant SINS with Pulse Output

Wang, Yinan; Ren, Zijun; Dong, Kaikai; Chen, Kai; Yan, Jie

doi:10.2991/ameii-16.2016.208

Cited by 2 publications

(4 citation statements)

References 8 publications

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“…T , m = 3, n = 1, as expressed in equation (1). α and β are set to 0.001, as expressed in equation (23). The initial value of the ALPF is set to P ALPF (0) = (σ G ) 2 .…”

Section: Simulation Results and Analysismentioning

confidence: 99%

“…In each part, three methods are taken for comparison, i.e. the GLRT method [8], the LPF-GLRT method [23], and the ALPF-GLRT method proposed in this paper.…”

Section: Simulation Results and Analysismentioning

confidence: 99%

“…In [22], a method of combining the GLRT with a three-channel filter for redundant IMUs is developed to address the difficulty under quantization noises of the gyroscope and the accelerometer, whereas its fault detection performance could be affected by the time-varying threshold that set beforehand by the Monte Carlo method. In [23], the GLRT combined with a low pass filter (LPF) is proposed to improve the performance of fault detection under quantization noises, whereas its performance is severely affected by the choice of filter coefficients.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ALPF-GLRT based fault detection method for small faults applied to redundant IMUs

Li¹,

Chen²,

Wu³

et al. 2021

Meas. Sci. Technol.

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Since small faults exhibit a very close magnitude to sensor noises, the probability of missing detection (PMD) in existing methods will increase sharply in the presence of small faults. To address such a problem, this paper proposes a novel fault detection method for small faults applied to redundant IMUs. First, this method introduces an adaptive low-pass filter (ALPF) into the general likelihood ratio test (GLRT) by filtering the parity residuals of the GLRT model, thereby reducing the disturbance of sensor noises on fault detection. Subsequently, since the introduction of ALPF leads to the changes of the parity residual statistics, the covariance of parity residual should be recalculated at the respective sample instant. Lastly, to theoretically prove the superiority of the proposed method for small faults, the minimum detection bias (MDB) is derived and calculated, thereby validating that the MDB of the proposed method is lower than that of the conventional GLRT method. As indicated from the simulation results, the PMD of the proposed method decreases significantly for small faults compared with the GLRT method and the Monte Carlo PMD of the proposed method is 0.1% under the fault with the magnitude of 1 sigma, which demonstrates the effectiveness of the proposed method.

show abstract

“…T , m = 3, n = 1, as expressed in equation (1). α and β are set to 0.001, as expressed in equation (23). The initial value of the ALPF is set to P ALPF (0) = (σ G ) 2 .…”

Section: Simulation Results and Analysismentioning

confidence: 99%

“…In each part, three methods are taken for comparison, i.e. the GLRT method [8], the LPF-GLRT method [23], and the ALPF-GLRT method proposed in this paper.…”

Section: Simulation Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

ALPF-GLRT based fault detection method for small faults applied to redundant IMUs

Li¹,

Chen²,

Wu³

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The quantization of the laser gyroscope and the accelerometer may disturb the error structure of the original information and bring many transient errors for low maneuvers, which may cause difficulty in fault detection. Yi [16] only introduced the low-pass filter concept and combined the generalized likelihood test (GLT) method for fault diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Fault Detection and Isolation for Redundant Inertial Measurement Unit under Quantization

Zhang¹,

Wang²,

Fu³

2018

Applied Sciences

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Fault detection and isolation with redundant strapdown inertial measurement unit is critical for ensuring the reliability of the guidance or navigation system in the fields of both aeronautics and astronautics. Although the parity space approach is used widely, it cannot detect the soft fault which affects navigation performance under pulse quantization. This paper develops the three-channel filters to detect the soft fault and conducts theoretical implementation. The constraint conditions of their parameters are explored and the influence of the weight of different ratios is analyzed. The Monte Carlo simulation is carried out in order to verify the validity of the fault detection and isolation method. The simulation results and their analysis provide a theoretical reference for fault detection and isolation with redundant strapdown inertial measurement unit.

show abstract

A Study on Fault Diagnosis of Redundant SINS with Pulse Output

Cited by 2 publications

References 8 publications

ALPF-GLRT based fault detection method for small faults applied to redundant IMUs

ALPF-GLRT based fault detection method for small faults applied to redundant IMUs

Fault Detection and Isolation for Redundant Inertial Measurement Unit under Quantization

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