A high gain observer coupled to a sliding mode technique for electropneumatic system control

Ayadi, Assil; Hajji, Sofien; Smaoui, Mohamed; Châari, Abdelkader; Farza, M.

doi:10.1109/sta.2014.7086795

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…In Reference [28], a method was proposed for a flexible joint robotic arm, which used a high-gain observer with multiple sliding modes to ensure the observability of fault/unknown input signals, and sliding modes were utilized for their reconstruction. Reference [29] focused on the design of a high-gain observer that estimated the unmeasured states to get the knowledge of all state variables for sliding-mode controller in order to control tracking position and pressure.…”

Section: Introductionmentioning

confidence: 99%

High-Gain Observer-Based Sliding-Mode Dynamic Surface Control for Particleboard Glue Mixing and Dosing System

et al. 2018

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In the process of particleboard glue mixing and dosing control under the working condition of intermediate frequency, a sliding-mode dynamic surface control strategy based on high-gain observer is proposed in this paper to deal with the problem of glue flow stability caused by strong nonlinearity. The high-gain observer (HGO) is aimed at estimating the derivative of the immeasurable system input signal for feedback, and the robustness of the system is improved by the dynamic surface control (DSC) method. Furthermore, the sliding-mode control (SMC) method is used to deal with disturbances caused by the uncertainties as well as external disturbances. It is proven that the system is exponential asymptotic stable by constructing a suitable Lyapunov function. Simulation results show that the proposed control methods can make the system track the expected flow value quickly and accurately. Finally, numerical simulation results are exhibited to authenticate and validate the effectiveness of the proposed control scheme.

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Section: Introductionmentioning

confidence: 99%

High-Gain Observer-Based Sliding-Mode Dynamic Surface Control for Particleboard Glue Mixing and Dosing System

et al. 2018

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High-Gain Observer-Based Sliding Mode Force Control for the Single-Rod Electrohydraulic Servo Actuator

Liu

2019

IEEE Access

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A high-gain observer based sliding mode force control system for the single-rod servo actuator is presented in this paper. In order to track the desired force, full states for feedback are needed. Since only the output force is measured, a high-gain observer with easy implementation and calibration is designed for the estimation of the unavailable states. Then the sliding mode controller is proposed and a continuously varying function instead of the traditional sign function is used to constitute the switching term of the control input which takes the distance of the system states from the sliding surface into account. So the chattering phenomena are eliminated. The stability of the closed-loop force control system is analyzed by the singular perturbation method and simulations show the effectiveness of the proposed force control method for the single-rod electrohydraulic servo actuator. INDEX TERMS High-gain observer, sliding mode control, chattering-free, servo actuator, force control.

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Dynamic High-Gain Observer to Estimate Pneumatic Actuator Temperatures

Ayadi

Hajji

Smaoui

et al. 2015

Journal of Dynamic Systems, Measurement, and Control

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This paper deals with the estimation of the actuator temperature in an electropneumatic system. First, an appropriate nonlinear system that accounts for the actuator temperature dynamics is introduced. Then in order to overcome the difficulty of installing temperatures sensors in each chamber of the actuator, two nonlinear high-gain observers are proposed to provide online estimate of these temperatures. The gain of both observers can be tuned by the choice of a scalar design parameter. However, the design parameter is constant for the first observer and its choice has to satisfy a compromise between an accurate estimation of the state estimation and a satisfactory sensitivity of the observer with respect to the unavoidable output noise measurements. This difficulty is overcome in the second observer since the scalar design parameter is time varying and is governed by a Riccatti differential equation. The involved adaptation process of the design parameter is mainly driven by the power of the output observation error norm computed on a moving horizon window. Simulation results are given to show the effectiveness of the proposed observers and in particular to compare the performance of both observers, namely, the accuracy of the respective estimates and their sensitivity with respect to noise measurements.

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A high gain observer coupled to a sliding mode technique for electropneumatic system control

Cited by 3 publications

References 12 publications

High-Gain Observer-Based Sliding-Mode Dynamic Surface Control for Particleboard Glue Mixing and Dosing System

High-Gain Observer-Based Sliding-Mode Dynamic Surface Control for Particleboard Glue Mixing and Dosing System

High-Gain Observer-Based Sliding Mode Force Control for the Single-Rod Electrohydraulic Servo Actuator

Dynamic High-Gain Observer to Estimate Pneumatic Actuator Temperatures

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