Radial pole path approach for fast response of affine constrained nonlinear systems with matched uncertainties

Kaheni, Mojtaba; Zarif, Mohammad Hadad; Kalat, Ali Akbarzadeh; Chisci, Luigi

doi:10.1002/rnc.4757

Cited by 8 publications

(2 citation statements)

References 50 publications

(87 reference statements)

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“…Based on the above results, we can see that the actuator-sensor fault compensation method is more effective than the sensor fault compensation method presented previously [33]. With the implementation of powerful control methods, the impact of the control input signal is very large when the input signal is very high, as shown in [44,45]. However, when the control speed is in the allowable limits (no more than 25 mm/s), a fault compensation based robust fault-tolerant control method can greatly reduce the effects of faults after each closed control loop.…”

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confidence: 81%

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

2021

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In recent years, electro-hydraulic systems have been widely used in many industries and have attracted research attention because of their outstanding characteristics such as power, accuracy, efficiency, and ease of maintenance. However, such systems face serious problems caused simultaneously by disturbances, internal leakage fault, sensor fault, and dynamic uncertain equation components, which make the system unstable and unsafe. Therefore, in this paper, we focus on the estimation of system fault and uncertainties with the aid of advanced fault compensation techniques. First, we design a sliding mode observer using the Lyapunov algorithm to estimate actuator faults that produce not only internal leakage fault but also disturbances or unknown input uncertainties. These faults occur under the effect of payload variations and unknown friction nonlinearities. Second, Lyapunov analysis-based unknown input observer model is designed to estimate sensor faults arising from sensor noises and faults. Third, to minimize the estimated faults, a combination of actuator and sensor compensation fault is proposed, in which the compensation process is performed due to the difference between the output signal and its estimation. Finally, the numerical simulations are performed to demonstrate the effectiveness of the proposed method obtained under various faulty scenarios. The simulation results show that the efficiency of the proposed solution is better than the traditional PID controller and the sensor fault compensation method, despite the influence of noises.

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confidence: 81%

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

2021

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“…A comprehensive control scheme should consider both the robustness and the quality response of the considered systems (e.g., control effort minimization, settling time modification, and so forth). In this regard, several control approaches have been presented for making nonlinear systems robust against matched uncertainties 1‐7 and mismatched uncertainties, 8‐13 which are not in the range space of the input matrix. Due to their unique features, designing a controller that be able to optimally and robustly manage nonlinear systems subjected to mismatched uncertainties has been the desire of researchers.…”

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confidence: 99%

Disturbance observer‐based two‐Layer control strategy design to deal with both matched and mismatched uncertainties

Shafei

Bahrami

Talebi

2020

Intl J Robust & Nonlinear

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This study presents a novel control strategy for managing nonlinear systems in the presence of mismatched uncertainties. Dealing with the uncertainties that do not satisfy the so‐called matching conditions is an ongoing issue in control engineering. In this regard, and for the first time, a disturbance observer (DO)‐based hybrid control system, which considers robustness as well as control signal optimality, is developed in this article. For this purpose, and with the aim of robustly managing uncertain nonlinear systems and achieving optimized control effort, an optimal control law based on the state‐dependent Riccati equation is integrated with a DO‐based second‐order sliding mode controller. The Lyapunov stability theory is applied to verify the asymptotic stability of the designed control system. Computer simulations are performed to demonstrate the efficacy and the superiority of our novel controller over two other existing methods (DO‐based sliding mode control [SMC] and DO‐based adaptive SMC). The simulation results show that the presented method is capable of managing uncertain nonlinear systems robustly and with much less control effort than the two mentioned methods.

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Soft variable structure control of linear fractional-order systems with actuators saturation

Abbaszadeh

Haddad-Zarif

2022

ISA Transactions

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Radial pole path approach for fast response of affine constrained nonlinear systems with matched uncertainties

Cited by 8 publications

References 50 publications

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

Disturbance observer‐based two‐Layer control strategy design to deal with both matched and mismatched uncertainties

Soft variable structure control of linear fractional-order systems with actuators saturation

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