Automation of a Hybrid Control for Electrohydraulic Servo-Actuators with Residual Dynamics

Sidhom, Lilia; Chihi, Inès; Smaoui, Mohamed

doi:10.3390/app12062856

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…Ref. [19] designed a hybrid force/bit controller to solve the electro-hydraulic servo system's residual force problem. Designing an appropriate control rate smoothed the force/bit control switch and reduced the residual force interference.…”

Section: Introductionmentioning

confidence: 99%

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Proposed Feedback-Linearized Integral Sliding Mode Control for an Electro-Hydraulic Servo Material Testing Machine

Sun,

Li,

Tan

et al. 2024

Machines

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High-precision tracking of an electro-hydraulic servo material testing machine’s force control system was achieved using a proposed integral sliding mode control method based on feedback linearization to improve the machine’s force control performance and anti-interference ability. First, the electro-hydraulic servo system’s nonlinear mathematical model was established, and its input–output linearization was realized using differential geometry theory. Second, integral sliding mode control was introduced into the controller and the feedback-linearized integral sliding mode controller was designed. The controller’s stability was proven based on the Lyapunov stability principle. Finally, a simulation model of the electro-hydraulic servo material testing machine’s force control system was established using AMESim/Simulink software. The designed controller was simulated and verified, and the control effects of the system’s different amplitudes and frequency signals were analyzed. The results showed that the feedback-linearized integral sliding mode control algorithm could effectively improve the system’s force tracking accuracy and parameter adaptability, yielding better robustness and a better control effect.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Refs. [19][20][21] did not consider the influence of external interference on the controller when designing their controllers. Ref.…”

Section: Introductionmentioning

confidence: 99%

Proposed Feedback-Linearized Integral Sliding Mode Control for an Electro-Hydraulic Servo Material Testing Machine

Sun,

Li,

Tan

et al. 2024

Machines

View full text Add to dashboard Cite

show abstract

“…In general, two kinds of hydraulic system configurations are used for these applications. One feasible method is to regulate the supply flow to the cylinder chamber by using an electrohydraulic servo/proportional valve [1,[11][12][13][14][15], which enables satisfactory dynamic behavior. Another approach is to regulate flow using a variable flow pump; this solution offers better energy efficiency [16], but the system bandwidth is restricted by the response speed of the pump, in which the moving parts' inertia is much larger than that of the servo/proportional valve.…”

Section: Introductionmentioning

confidence: 99%

A Novel Reference Governor for Disturbance Observer-Based Load Pressure Control in a Dual-Actuator-Driven Electrohydraulic Actuator

et al. 2022

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In real-world applications, hydraulic pressure control performance is influenced by model uncertainties, the control bandwidths of valves and pumps, and deviations from the linear working region. To overcome the aforementioned obstacles, a novel reference governor for disturbance observer (DOB)-based load pressure control is proposed in this paper for a dual-actuator-driven electrohydraulic cylinder. First, a control-oriented model for load pressure control was developed. On the basis of this, a nonlinear DOB-based feedback controller, as well as a mid-range control architecture for the variable displacement pump and proportional valve, was fabricated so that the performance degradation caused by the pump’s slow responses and imprecise system parameters is suppressed. Specifically, this controller is augmented by a novel smooth reference governor, which modifies the load pressure command in the pressure transition periods to guarantee that the actuator’s constraints are not violated. Another merit of the novel reference governor is that it ensures a smooth trajectory transition, and therefore, unmodeled high-frequency plant dynamics will not be invoked. Case studies were carried out to verify the effectiveness of the proposed control approach. The study results show that the approach can significantly enhance the hydraulic system’s pressure tracking performance.

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Fault diagnosis and self-healing for smart manufacturing: a review

Aldrini,

Chihi,

Sidhom

2023

J Intell Manuf

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Manufacturing systems are becoming more sophisticated and expensive, particularly with the development of the intelligent industry. The complexity of the architecture and concept of Smart Manufacturing (SM) makes it vulnerable to several faults and failures that impact the entire behavior of the manufacturing system. It is crucial to find and detect any potential anomalies and faults as soon as possible because of the low tolerance for performance deterioration, productivity decline, and safety issues. To overcome these issues, a variety of approaches exist in the literature. However, the multitude of techniques make it difficult to choose the appropriate method in relation to a given context. This paper proposes a new architecture for a conceptual model of intelligent fault diagnosis and self-healing for smart manufacturing systems. Based on this architecture, a review method for the different approaches, sub-approaches and methods used to develop a Fault Detection and Diagnosis (FDD) and Self-Healing-Fault-Tolerant (SH-FT) strategy dedicated to smart manufacturing is defined. Moreover, this paper reviews and analyzes more than 256 scientific articles on fault diagnosis and self-healing approaches and their applications in SM in the last decade. Finally, promising research directions in the field of resilient smart manufacturing are highlighted.

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Automation of a Hybrid Control for Electrohydraulic Servo-Actuators with Residual Dynamics

Cited by 3 publications

References 35 publications

Proposed Feedback-Linearized Integral Sliding Mode Control for an Electro-Hydraulic Servo Material Testing Machine

Proposed Feedback-Linearized Integral Sliding Mode Control for an Electro-Hydraulic Servo Material Testing Machine

A Novel Reference Governor for Disturbance Observer-Based Load Pressure Control in a Dual-Actuator-Driven Electrohydraulic Actuator

Fault diagnosis and self-healing for smart manufacturing: a review

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