Variable high-gain disturbance observer design with online adaption of observer gains embedded in numerical integration

A multivariable super-twisting sliding mode controller and disturbance observer with gain adaptation, chattering reduction, and finite time convergence are proposed for a generic hypersonic vehicle where the boundary of aerodynamic uncertainties exists but is unknown. Firstly, an input-output linearization model is constructed for the purpose of controller design. Then, the sliding manifold is designed based on the homogeneity theory. Furthermore, an integrated adaptive multivariable super-twisting sliding mode controller and disturbance observer are designed in order to achieve the tracking for step changes in velocity and altitude. Finally, some simulation results are provided to verify the effectiveness of the proposed method.

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Nonlinear Disturbance Observer design for estimation of ammonia storage ratio in selected catalytic reduction systems

2015 American Control Conference (ACC) ◽

10.1109/acc.2015.7170784 ◽

2015 ◽

Author(s):

Jinbiao Ning ◽

Fengjun Yan

Keyword(s):

Disturbance Observer ◽

Catalytic Reduction ◽

Observer Design ◽

Nonlinear Disturbance Observer ◽

Ammonia Storage ◽

Nonlinear Disturbance

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A Robust Control Design Approach Combining Exact Linearization and High-Gain PI-Observer

Volume 5: 6th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A, B, and C ◽

10.1115/detc2007-34344 ◽

2007 ◽

Cited By ~ 1

Author(s):

Yan Liu ◽

Dirk So¨ffker

Keyword(s):

Feedback Linearization ◽

Control Method ◽

High Gain ◽

Observer Design ◽

Input State ◽

Exact Linearization ◽

Practical Applications ◽

Robust Control Design ◽

Nonlinear Control Method ◽

Feedback Linearization Approach

This paper introduces a robust nonlinear control method combining classical feedback linearization and a high-gain PI-Observer (Proportional-Integral Observer) approach that can be applied to control a nonlinear single-input system with uncertainties or unknown effects. It is known that the lack of robustness of the feedback linearization approach limits its practical applications. The presented approach improves the robustness properties and extends the application area of the feedback linearization control. The approach is developed analytically and fully illustrated. An example which uses input-state linearization and PI-Observer design is given to illustrate the idea and to demonstrate the advantages.

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Average Modeling and Nonlinear Observer Design For Pneumatic Actuators With On/Off Solenoid Valves

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4052394 ◽

2021 ◽

Author(s):

Khaled Laib ◽

Minh Tu Pham ◽

Xuefang LIN-SHI ◽

Redha Meghnous

Keyword(s):

Closed Loop ◽

Sliding Mode ◽

High Gain ◽

Observer Design ◽

Nonlinear Observer ◽

State Model ◽

Pressure Measurements ◽

Pneumatic Actuators ◽

Nonlinear Observers ◽

Piston Position

Abstract This paper presents an averaged state model and the design of nonlinear observers for an on/off pneumatic actuator. The actuator is composed of two chambers and four on/off solenoid valves. The elaborated averaged state model has the advantage of using only one continuous input instead of four binary inputs. Based on this new model, a high gain observer and a sliding mode observer are designed using the piston position and the pressure measurements in one of the chambers. Finally, their closed-loop performances are verified and compared on an experimental benchmark.

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