
Development of event‐triggered‐based minimum variance recursive estimator for the NLNS using multi‐model approach
Author(s) -
Kumar Roy Avinash,
Kannan Srinivasan
Publication year - 2019
Publication title -
iet signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 42
ISSN - 1751-9683
DOI - 10.1049/iet-spr.2018.5546
Subject(s) - estimator , computer science , filter (signal processing) , bernoulli's principle , mathematics , control theory (sociology) , mean squared error , network packet , minimum variance unbiased estimator , minimum mean square error , algorithm , mathematical optimization , statistics , artificial intelligence , computer network , control (management) , engineering , computer vision , aerospace engineering
The minimum variance‐based recursive estimator is designed to estimate the unmeasurable states of a non‐linear networked system (NLNS). The measurable states are transmitted from sensor to the estimator (S–E) through a communication network. An event‐triggered mechanism is proposed to limit data transmission in the S–E network to improve channel utilisation. The control input is transmitted from the controller to actuator (C–A) through another communication network. The networks in the S–E and C–A channels are affected by random packet delay, loss, and uncertain observation. These effects are modelled using five Bernoulli distributed random variables. The NLNS is converted to ‘ m ’ local linear stochastic augmented models by piecewise linearisation technique. The ‘ m ’ number of local estimators are designed for every local model using projection theorem. Global estimation is obtained by blending local estimators using T–S fuzzy approach. The proposed algorithm is recursive and has the advantage of scalability and flexibility. Finally, estimator performance is demonstrated using a non‐linear tunnel diode and compared with the other popular filters. Monte Carlo simulation is performed and accumulated mean‐square error values are calculated. From the simulation results, the proposed filter shows satisfactory performance.