Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System

Li, Yang; Zhang, Jiao; Zimeng, Wang

doi:10.3390/s20030634

Cited by 14 publications

(5 citation statements)

References 24 publications

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“…Traditional power density [17]. The smart material actuator generates displacement under external excitation to push the piston to compress the oil, which is rectified through the valve and continuously enters the hydraulic cylinder to form continuous motion [18]. Herein, as an important index, the flow rate of the EHA depends on the stroke and operating frequency of the smart material actuator.…”

Section: Introductionmentioning

confidence: 99%

Development of a dual-mode electro-hydrostatic actuator with serial-parallel hybrid configured piezoelectric pumps

Ling¹,

Chen²,

Zhang³

et al. 2023

Smart Mater. Struct.

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Smart materials-based electro-hydrostatic actuator (EHA) plays an important role in the power-by-wire technology for the next generation of more electric aircraft. However, the output flow of a smart materials-based EHA is relatively low to narrow down its practical applications. To address this issue, a piezoelectric material-based dual-mode electrohydrostatic actuator (DMEHA) is proposed in this work. The output flow can be improved by adopting two piezoelectric pumps without sacrificing the carrying capacity. In addition, a hybrid serial and parallel configuration for the two pumps is realized for the adaptability of different actuation requirements. Mathematical modeling and parameter identification are conducted and presented in detail for the designers. A physical prototype is fabricated and a series of experiments are carried out to investigate its characteristics. Results indicated that the DMEHA achieves a maximum output flow of 1.17 L/min at 360 Hz under the serial mode and the blocking load up to 40 kg. The corresponding maximum output flow in the parallel mode can reach 1.96 L/min at 420 Hz, and the blocking load is 20 kg.

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Section: Introductionmentioning

confidence: 99%

Development of a dual-mode electro-hydrostatic actuator with serial-parallel hybrid configured piezoelectric pumps

Ling¹,

Chen²,

Zhang³

et al. 2023

Smart Mater. Struct.

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show abstract

“…Furthermore, direct-drive pumps based on smart materials are limited in application due to short strokes and high expense [4,5]. Therefore, scholars explore novel direct-drive pumps based on the optimized design of linear pumps [6][7][8]. As a critical component of the novel pump control system to achieve high response, the direct-drive pump has become a novel hotspot for its high integration, energysaving, control flexibility, and strong stability [9,10].…”

Section: Introductionmentioning

confidence: 99%

Adaptive disturbance observer-based improved super-twisting sliding mode control for electromagnetic direct-drive pump

Lu¹,

Tan²,

Ge³

et al. 2022

Smart Mater. Struct.

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In this study, to enhance the frequency-flow characteristics of the novel electromagnetic direct-drive pump (EDDP). An adaptive disturbance observer-based improved super-twisting sliding mode control (ISTSMC-ADOB) is proposed to address the problem in which the response quality is deteriorated by factors such as parameter mismatch and disturbance. An adaptive disturbance observer (ADOB) is designed to achieve adaptive compensation, avoid the use of high-gain feedback, and extend the applicability of the conventional disturbance observer (DOB). An improved super-twisting sliding mode control (ISTSMC) based on the fast terminal sliding mode (FTSM) algorithm is designed to ensure faster convergence of the error in finite time. By combining the ADOB with the ISTSMC, the conservative parameter selection of the sliding mode control (SMC) is avoided, and the accuracy and robustness are further strengthened. The stability is analyzed based on Lyapunov. The results show that the proposed method effectively improves the steady-state accuracy, response speed, and robustness in trajectory tracking of the electromagnetic linear actuator (EMLA) for the EDDP. This further enhances the frequency-flow characteristics of the system.

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“…The electric energy is directly converted into hydraulic energy at the actuator end, and then the hydraulic energy is converted into mechanical energy of the cylinder, which has the advantages of both hydraulic drive and electric drive actuators. The modular design is very simple for EHA systems, because there is no centralized oil source and it only includes an electrical interface and mechanical structure externally [14]. Despite all of the advantages of the EHA, the evolution of its location tracking performance remains a significant challenge.…”

Section: Introductionmentioning

confidence: 99%

RISE-Based Composite Adaptive Control of Electro-Hydrostatic Actuator with Asymptotic Stability

Yang

Deng

et al. 2021

Machines

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The electro-hydrostatic actuator (EHA), the actuator of electric drive and hydraulic transmission, is competitive since it is small in size, light in weight and high in power density. However, the existence of the velocity loop error of servo motors, unmodeled dynamics and highly nonlinear uncertainties restrict the improvement of the tracking accuracy of the EHA system. In order to achieve high-precision motion control of EHAs, a RISE-based composite adaptive control scheme is proposed in this paper. In the proposed composite adaptive control design, a novel parameter adaptive law is synthesized to compensate for the parametric uncertainties and a robust integral of the sign of error (RISE) feedback is utilized to suppress the adverse effects caused by the lumped disturbances, including the velocity loop error of a servo motor and other unmodeled dynamics. The synthesized parameter adaptive law possesses the advantage of fast convergence, which is beneficial to achieve transient tracking performance improvement. In addition, the proposed controller is more suitable for practical applications since it is chattering free. The closed-loop system stability analysis shows that the proposed control scheme guarantees an excellent asymptotic tracking performance. Finally, comparative simulations are conducted to verify the high-performance nature of the proposed controller.

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Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System

Cited by 14 publications

References 24 publications

Development of a dual-mode electro-hydrostatic actuator with serial-parallel hybrid configured piezoelectric pumps

Development of a dual-mode electro-hydrostatic actuator with serial-parallel hybrid configured piezoelectric pumps

Adaptive disturbance observer-based improved super-twisting sliding mode control for electromagnetic direct-drive pump

RISE-Based Composite Adaptive Control of Electro-Hydrostatic Actuator with Asymptotic Stability

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