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

Lu, Junting; Xie, Haibo; Chen, Yunmin; Yang, Huayong

doi:10.1177/09544062221121983

Cited by 2 publications

(2 citation statements)

References 29 publications

(29 reference statements)

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“…The spool diameter of the piston was set to 17.02 mm, the rod diameter is set to 14.93 mm, and the force area of the piston (A P ) was calculated as π 4 × 17.02 2 − 14.93 2 = 52.445 mm 2 . DREHSV simulation model [22], as shown in Figure 8.…”

Section: Double-system Slide Valve Modelingmentioning

confidence: 99%

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Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Liang,

Wang,

Zhai

et al. 2023

Actuators

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The feedback spring rod of the armature assembly was eliminated in the double-redundancy electro-hydraulic servo valve (DREHSV), which employed a redundant design in contrast to the typical double-nozzle flapper electro-hydraulic servo valve (DNFEHSV). The pilot stage was mainly composed of four torque motors, and the double-system spool was adopted in the power stage. Consequently, the difficulty of spool displacement control was increased. By artificially changing the structural parameters of the simulation model in accordance with the theoretical analysis through AMESim, this paper aimed to study the dynamics and static characteristics of the DREHSV. The advantage of redundant design was further demonstrated by disconnecting working coils and setting the different worn parts of the spool. On the test bench, the necessary experiments were performed. Through simulation, it was discovered that when the clogged degree of the nozzle is increased, the zero bias value increases, the pressure and flow gain remain unchanged, and the internal leakage decreases. The pressure gain changes very little, the flow gain close to the zero position grows, the zero leakage increases significantly, and the pilot stage leakage changes very little as a result of the wear of the spool throttling edge. The basic consistency between the simulation curves and the experimental findings serve to validate the accuracy of the AMESim model. The findings can serve as a theoretical guide for the design, debugging, and maintenance of the DREHSV. The simulation model is also capable of producing a large amount of sample data for DREHSV fault diagnosis using a neural network.

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Section: Double-system Slide Valve Modelingmentioning

confidence: 99%

“…After modeling the key components of the pilot stage and power stage, the displacement sensor, PID controller, orifice, and other sub-models were added to construct the DREHSV simulation model [22], as shown in Figure 8.…”

Section: Amesim Overall Simulation Modelmentioning

confidence: 99%

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Liang,

Wang,

Zhai

et al. 2023

Actuators

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Design of two-degree-of-freedom position tracking controller for hypergravity unidirectional airborne shaking table

Yang,

Xie

2024

Proceedings of the Institution of Mechanical Engineers, Part I:

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Hypergravity centrifugal shaking table is widely used in the field of civil engineering and is considered to be the most effective means to study geotechnical earthquake disaster effect in the world today. Here, the structure of hypergravity centrifugal shaking table system is briefly introduced, and then the necessity and difficulty of the precise control of the position ring of the airborne shaking table in the hypergravity centrifugal shaking table are explained. On this premise, the system modeling and analysis of the unidirectional airborne shaking table with hypergravity are carried out in this paper. A new two-degree-of-freedom controller of the unidirectional airborne shaking table with hypergravity is designed by combining the [Formula: see text] control and an improved internal model control (IIMC) strategy, and the designed two-degree-of-freedom controller is experimentally verified. The experimental results show that compared with the traditional PID control strategy and the single [Formula: see text] control strategy, the two-degree-of-freedom controller designed in this paper can make the position loop control of the unidirectional airborne shaking table with hypergravity have higher control accuracy and anti-interference ability.

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

Cited by 2 publications

References 29 publications

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Design of two-degree-of-freedom position tracking controller for hypergravity unidirectional airborne shaking table

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