The Elevator Fault Diagnosis Method Based on Sequential Probability Ratio Test (SPRT)
نویسندگان
چکیده
An elevator fault diagnosis method based on Sequential Probability Ratio Test (SPRT) is proposed in this paper. In order to verify the effectiveness of the method, this paper designed the fault diagnosis experiment for elevator mechanical system. Firstly, the wavelet transformation is used to filter the noise of the vibration signal collected in the experiment. Then the kurtosis value of the filtered signal is extracted as the index to represent the practical status of the elevator. Finally, the SPRT algorithm is used to diagnose the faults of the elevator mechanical system. Experimental results show that this method has high accuracy in practical applications. It is important to improve the performance of the fault diagnosis for the elevator mechanical system.
منابع مشابه
OPTIMALITY ANALYSIS OF SEQUENTIAL PROBABILITY RATIO TEST Strictly Optimal Sequential Tests
The sequential probability ratio test (SPRT) is asymptotically optimal in the speed versus accuracy tradeoff (SAT) for problems such as visual search (Ch. 3) and scotopic object recognition (Ch. 4), but how close to optimal is SPRT in the nonasymptotic case, i.e. when the cost of error η or the expected response time is small? We numerically compare SPRT and the optimal strategy on the homogene...
متن کاملA Context-Dependent Sequential Decision for Speaker Verification
This paper presents an improved method of speaker verification using the sequential probability ratio test (SPRT), which can treat the correlation between successive feature vectors. The hidden Markov model with the mean field approximation enables us to consider the correlation in the SPRT, i.e., using the mean field of previous state, probability computation can be carried out as if input sam...
متن کاملDetection of Reliable Software using S-Shaped Model
Software reliability growth models using NonHomogeneous Poisson Process (NHPP) with mean value function – dependent on fault detection rate is considered. The well known Sequential Probability Ratio Test (SPRT) procedure of statistical science is adopted for the model in order to decide upon the reliability / unreliability of developed software. In the present paper, we have proposed the perfor...
متن کاملSequential Locally Optimum Test (SLOT): A Sequential Detection Scheme Based on Locally Optimum Test Statistic
Based on the characteristics of the thresholds of two detection schemes employing locally optimum test statistics, a sequential detection design procedure is proposed and analyzed. The proposed sequential test, called the sequential locally optimum test (SLOT), inherently provides finite stopping time (terminates with probability one within the finite horizon), and thereby avoids undesirable fo...
متن کاملAnomaly Monitoring Method for Key Components of Satellite
This paper presented a fault diagnosis method for key components of satellite, called Anomaly Monitoring Method (AMM), which is made up of state estimation based on Multivariate State Estimation Techniques (MSET) and anomaly detection based on Sequential Probability Ratio Test (SPRT). On the basis of analysis failure of lithium-ion batteries (LIBs), we divided the failure of LIBs into internal ...
متن کامل