Probabilistic Monitoring of Correlated Sensors for Nonlinear Processes in State Space
- Authors
- Zhao, Shunyi; Shmaliy, Yuriy S.; Ahn, Choon Ki; Zhao, Chunhui
- Issue Date
- 3월-2020
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Sensors; Noise measurement; Monitoring; Probability density function; Atmospheric measurements; Particle measurements; Inference algorithms; Nonlinear process; particle approximation; sensor monitoring; state estimation; variational Bayesian (VB) inference
- Citation
- IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.67, no.3, pp.2294 - 2303
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
- Volume
- 67
- Number
- 3
- Start Page
- 2294
- End Page
- 2303
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/57549
- DOI
- 10.1109/TIE.2019.2907505
- ISSN
- 0278-0046
- Abstract
- To optimize control and/or state estimation of industrial processes, information about measurement quality provided by sensors is required. In this paper, a probabilistic scheme is proposed in discrete-time nonlinear state space with the purpose of sensor monitoring. A quantitative index representing the measurement quality, as well as satisfied state estimates, is obtained by estimating the probability density functions (PDFs) of the states and the measurement noise covariance considered as a random variable using the variational Bayesian approach. To solve the intractable integrals of nonlinear PDFs in real time, a set of weighted particles is generated to overlap an empirical density of state, while the PDF of the measurement noise is still derived analytically. An example of localization and an experiment with a rotary flexible joint are supplied to demonstrate that the proposed algorithm significantly improves the applicability of existing methods and can monitor correlated sensors satisfactorily.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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