Sliding-mode observers for systems with unknown inputs: A high-gain approach

Automatica ◽  
2010 ◽  
Vol 46 (2) ◽  
pp. 347-353 ◽  
Author(s):  
Karanjit Kalsi ◽  
Jianming Lian ◽  
Stefen Hui ◽  
Stanislaw H. Żak
Keyword(s):  
Sliding Mode ◽  
High Gain ◽  
Unknown Inputs ◽  
Sliding Mode Observers

High gain and sliding mode observers for the control of an electropneumatic actuator

2006 ◽  
Author(s):  
A. Girin ◽  
F. Plestan ◽  
X. Brun ◽  
A. Glumineau ◽  
M. Smaoui
Keyword(s):  
Sliding Mode ◽  
High Gain ◽  
Sliding Mode Observers

scholarly journals Robust High-Gain Observers Based Liquid Levels and Leakage Flow Rate Estimation

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Feten Smida ◽  
Salim Hadj Saïd ◽  
Faouzi M’sahli
Keyword(s):  
Flow Rate ◽  
Sliding Mode ◽  
High Gain ◽  
Perfect Reconstruction ◽  
Leakage Flow ◽  
State Variables ◽  
Leakage Flow Rate ◽  
Tank System ◽  
Sliding Mode Observers ◽  
Estimation Quality

The paper aims to solve the problem of liquid level and leakage flow rate estimations for a state coupled four-tank process, that is why an UIO is developed to simultaneously estimate the unmeasured state variables and the perturbations considered as unknown inputs. We have proposed a state repartition that allows putting the model of the quadruple tank system to the canonical form for which the design of the observer is more easier. The observation scheme that uses a combination of high-gain observers and sliding mode observers allows improving robustness in the state estimation quality and a perfect reconstruction of the disturbance waveforms.

scholarly journals Sliding-mode observers for systems with unknown inputs: Application to estimating the road profile

2005 ◽  
Vol 219 (8) ◽  
pp. 989-997 ◽  
Author(s):  
H Imine ◽  
N K M'Sirdi ◽  
Y Delanne
Keyword(s):  
Sliding Mode ◽  
Experimental Measurements ◽  
Vehicle Model ◽  
Unknown Parameters ◽  
Unknown Inputs ◽  
The Road ◽  
Road Profile ◽  
Road Friction ◽  
Simulation Results ◽  
Sliding Mode Observers

In this paper, a sliding-mode observer for systems with unknown inputs is presented. The system considered is a vehicle model with unknown inputs that represent the road profile variations. Coefficients of road adhesion are considered as unknown parameters. The tyre-road friction depends essentially on these parameters. The developed observer permits these longitudinal forces acting on the wheels to be estimated. Then another observer is developed to estimate the unknown inputs. In the first part of this work, some results are presented which are related to the validation of a full-car modelization, by means of comparisons between simulation results and experimental measurements (from a Peugeot 406 as a test car).

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