A recursive parameter estimator yielding exponential convergence under sufficient excitation

1989 ◽  
Vol 8 (2) ◽  
pp. 207-228 ◽  
Author(s):  
E. W. Kamen
Keyword(s):  
Exponential Convergence ◽  
Parameter Estimator ◽  
Recursive Parameter Estimator

Switching Adaptive Observer for Lithium-Ion Battery State of Charge Estimation

2014 ◽  
Author(s):  
Yonghua Li ◽  
R. Dyche Anderson
Keyword(s):  
Open Circuit Voltage ◽  
Lithium Ion ◽  
Open Circuit ◽  
State Of Charge ◽  
Adaptive Observer ◽  
Parameter Estimator ◽  
Propulsion Systems ◽  
Battery State Of Charge ◽  
State Of Charge Estimation ◽  
Recursive Parameter Estimator

A switching adaptive observer is proposed for estimation of state of charge (SOC) for lithium ion batteries used in electrified automotive propulsion systems. The base observer includes (i) a parameter estimation subsystem including a recursive parameter estimator for identifying battery parameters and (ii) an open circuit voltage (OCV) estimation subsystem including a nonlinear adaptive observer for estimating battery OCV. A timer as well as excitation level determination decides when the ampere-hour integration based SOC or estimated OCV based SOC is used as output. Using this approach, transient response of the adaptive SOC estimator is greatly improved. Examples are used to show the effectiveness of the proposed approach.

scholarly journals Towards a Useful Approximation of the Optimal Recursive Parameter Estimator

1994 ◽  
Vol 27 (8) ◽  
pp. 959-964
Author(s):  
D.M. Wiberg ◽  
D. Ljungquist ◽  
T.D. Powell
Keyword(s):  
Parameter Estimator ◽  
Recursive Parameter Estimator
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