Computational Issues in a Nonlinear Observer for Systems with Quantized Outputs

2005 ◽  
Author(s):  
D. Shevitz ◽  
R. Jones ◽  
B. Paden
Keyword(s):  
Nonlinear Observer

A nonlinear fractional-order H∞ observer for SOC estimation of battery pack of electric vehicles

2021 ◽  
pp. 095440702199434
Author(s):  
Wei Yue ◽  
Cong-zhi Liu ◽  
Liang Li ◽  
Xiang Chen ◽  
Fahad Muhammad
Keyword(s):  
Fractional Order ◽  
Estimation Method ◽  
Equivalent Circuit Model ◽  
Lithium Ion ◽  
Open Circuit ◽  
Design Criterion ◽  
Observer Design ◽  
Nonlinear Observer ◽  
Battery Pack ◽  
Soc Estimation

This work is focused on designing a fractional-order [Formula: see text] observer and applying it into the state of charge (SOC) estimation for lithium-ion battery pack system. Firstly, a fractional order equivalent circuit model based on the fractional capacitor is established and identified. Secondly, the SOC estimation method based on the fractional-order [Formula: see text] observer is proposed. The nonlinear intrinsic relationship between the open-circuit voltage and SOC is described as a polynomial function, and its Lipschitz proposition has been discussed. Then, the nonlinear observer design criterion is established based on the Lyapunov method. Finally, the effectiveness of the proposed method is verified with high accuracy and robustness by the experiment results.

scholarly journals A Nonlinear Observer for Robust Fault Reconstruction in One-Sided Lipschitz and Quadratically Inner-Bounded Nonlinear Descriptor Systems

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 22455-22469
Author(s):  
Joseph Chang Lun Chan ◽  
Tae H. Lee ◽  
Chee Pin Tan ◽  
Hieu Trinh ◽  
Ju H. Park
Keyword(s):  
Nonlinear Observer ◽  
Descriptor Systems ◽  
Fault Reconstruction

scholarly journals Semiglobally Asymptotically Stable Nonlinear Observer for Camera Aided Navigation

2020 ◽  
pp. 1-8
Author(s):  
Elias Bjorne ◽  
Edmund Forland Brekke ◽  
Torleiv Haland Bryne ◽  
Tor Arne Johansen
Keyword(s):  
Nonlinear Observer ◽  
Asymptotically Stable

scholarly journals Reduced-order Nonlinear Observer Design for Two-time-scale Systems

2020 ◽  
Vol 53 (2) ◽  
pp. 5922-5927
Author(s):  
Zhaoyang Duan ◽  
Costas Kravaris
Keyword(s):  
Time Scale ◽  
Observer Design ◽  
Nonlinear Observer ◽  
Reduced Order

A Nonlinear Observer SOC Estimation Method Based on Electrochemical Model for Lithium-Ion Battery

2021 ◽  
Vol 57 (1) ◽  
pp. 1094-1104
Author(s):  
Yuntian Liu ◽  
Rui Ma ◽  
Shengzhao Pang ◽  
Liangcai Xu ◽  
Dongdong Zhao ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Estimation Method ◽  
Lithium Ion ◽  
Nonlinear Observer ◽  
Soc Estimation ◽  
Electrochemical Model

Application of Practical Observer to Semi-Active Suspensions

1998 ◽  
Vol 122 (2) ◽  
pp. 284-289 ◽  
Author(s):  
H. Nakai ◽  
S. Oosaku ◽  
Y. Motozono
Keyword(s):  
Ride Comfort ◽  
Difficult Problem ◽  
Nonlinear Observer ◽  
Vertical Acceleration ◽  
Acceleration Sensor ◽  
Active Suspensions ◽  
Linear Observer ◽  
Gain Scheduled

This paper presents the development of gain-scheduled observers for semi-active suspensions. The states of the semi-active suspensions must be accurately obtained because the accuracy directly affects system performances such as ride comfort. Nonlinearity in the absorber of the semi-active suspensions is a difficult problem for estimating the accurate states using conventional linear observer theories. To solve this problem, we have designed a new gain-scheduled observer by introducing two improvements. The validity of this nonlinear observer was confirmed by simulations and experiments. The results indicate that the present observer can accurately estimate the suspension stroke velocity using the vertical acceleration sensor on the sprung mass. [S0022-0434(00)02302-9]

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