Dynamic modeling and experimental investigations of a magnetostrictive nozzle–flapper servovalve pilot stage

Zhu, Yuchuan; Yang, Xulei; Fu, Tong

doi:10.1177/0959651815621668

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…The MATLAB/Simulink simulation model of the system is established as shown in Figure 12. Tables 2 and 3 show some main parameters of the model, and some of parameters are derived from references (Zhu et al, 2016).…”

Section: Simulation Model Of Admehamentioning

confidence: 99%

Research on an axial-mounted dual magnetostrictive material rods-based electro-hydrostatic actuator

Zhu

Liu

Song

et al. 2021

Journal of Intelligent Material Systems and Structures

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In this paper, an electro-hydrostatic actuator driven by dual axial-mounted magnetostrictive material rods-based pumps (MMPs) with a new type of active rectification valve is designed in the current study. Based on flow distribution of the active rectification valve and driving energy provided by two MMPs, the actuator can output continuous and bidirectional displacement. By establishing a mathematical model of the actuating system, using simulation techniques, the change rule of hydraulic cylinder’s motion state caused by different driving signals are studied and analyzed. Test equipment platform is constructed in the laboratory to test the output characteristics and confirm the feasibility of the new concept. The experimental results indicate that the maximum flow rate can reach approximately 2.7 L·min−1, while the operating frequency is 180 Hz.

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Section: Simulation Model Of Admehamentioning

confidence: 99%

Research on an axial-mounted dual magnetostrictive material rods-based electro-hydrostatic actuator

Zhu

Liu

Song

et al. 2021

Journal of Intelligent Material Systems and Structures

Self Cite

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“…Otherwise, the block inside the red line is the open loop simulation model. Table 1 lists the values of major parameters in the simulation model, and some are derived from the [26,27].…”

Section: Simulation Model and Analysis Of The Dmehamentioning

confidence: 99%

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

Wang

Zhu

Jiang

et al. 2020

Smart Mater. Struct.

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In this paper, the position control system based on a dual magnetostrictive rods-based electrohydrostatic actuator (DMEHA) was presented. The bidirectional output displacement of the DMEHA is achieved by a combination of an active rotary rectification valve and two magnetostrictive piston pumps. Simulations and experiments were performed to validate the feasibility of the DMEHA's position control. The results indicate that the DMEHA's output flow rate varies under different peak to peak input current and the DMEHA achieves bidirectional output displacement by adjusting appropriate phase angle of input current without directional valves. The designed DMEHA's peak out flow rate can reach 3.136 l min −1 at the driving frequency of 200 Hz. While tracking a sinusoidal displacement command signal with amplitude 3 mm and frequency 5 Hz, the maximum tracking error displacement is 0.96 mm and the root mean squared error is 0.561 mm at 200 Hz driving frequency and 6 A peak to peak input current.

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“…Similarly, the servo valve driven by giant magnetostrictive actuator has the property of fast response. [23][24][25] While such actuator also has the drawback of high hysteresis and its low stroke results in the low flow rate of the servo valve. 26 Therefore, it is significant to find an actuation strategy to achieve both large flow and high frequency response for servo valve-controlled hydraulic systems.…”

Section: Introductionmentioning

confidence: 99%

Flow-reduced double valve actuation for improving the dynamic performance of electro-hydraulic servo drive

Xie

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Due to the negative correlation between the frequency response and the rated flow of the servo valve, there remains challenge to achieve high dynamic response of large-flow servo valve-controlled hydraulic systems under extreme operating conditions. Although the effective bandwidth of such system can be extended via various control methods, the inherent performance limit of hardware limits further improvement of the system dynamic response. In this paper, a flow-reduced double valve actuation strategy is proposed to improve the performance of electro-hydraulic servo drives. By reducing the actually used flow, the frequency response of the servo valve is enhanced due to the decreased hydraulic spring force and transient flow force acting on the spool. Two flow-reduced servo valves are adopted in parallel to meet large flow along with the improved dynamic performance. Simulation research is conducted and a servo valve-controlled shaking table with a specially designed valve block is used for experimental validation. Simulation and experimental results prove that the proposed strategy possesses better dynamic performance than the conventional single valve actuation.

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Dynamic modeling and experimental investigations of a magnetostrictive nozzle–flapper servovalve pilot stage

Cited by 11 publications

References 24 publications

Research on an axial-mounted dual magnetostrictive material rods-based electro-hydrostatic actuator

Research on an axial-mounted dual magnetostrictive material rods-based electro-hydrostatic actuator

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

Flow-reduced double valve actuation for improving the dynamic performance of electro-hydraulic servo drive

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