Optimization Design of Actuator Parameters with Stepless Capacity Control System Considering the Effect of Backflow Clearance

Zhang, Jinjie; Zhou, Chao; Jiang, Zhinong; Wang, Yao; Xu, Sun

doi:10.3390/app10082703

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…Stepless control was proposed by the work of Tuymer [82], and it has been mainly used in reciprocating compressors. In the past decade, the research interest in stepless control has focused on theoretical modelling and performance analysis [81,83,84], dynamics of the suction valve [85][86][87], and the optimisation of the actuator [88][89][90].…”

Section: Capacity Controlmentioning

confidence: 99%

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A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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Positive displacement compressors are essential in many engineering systems, from domestic to industrial applications. Many studies have been devoted to providing more insights into the workings and proposing solutions for performance improvements of these machines. This study aims to present a systematic review of published research on positive displacement compressors of various geometrical structures. This paper discusses the literature on compressor topics, including leakage, heat transfer, friction and lubrication, valve dynamics, port characteristics, and capacity control strategies. Moreover, the current status of the application of machine learning methods in positive displacement compressors is also discussed. The challenges and opportunities for future work are presented at the end of the paper.

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Section: Capacity Controlmentioning

confidence: 99%

“…• Fatigue and wear consequences on the suction valve due to the reverse flow [81][82][83][84][85][86][87][88][89][90] Table 5. Cont.…”

Section: Principle Pros and Cons Referencesmentioning

confidence: 99%

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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“…A closed-loop system is a system that has feedback and whose output determines the state of the entire system. Since this control method has a feedback effect that effectively suppresses and eliminates the influence of undesirable factors such as errors in the system on the output results, its control is much better than open-loop and is particularly suitable for use in situations where higher accuracy is required [4] . A brief structural block diagram of an open-loop hydraulic synchronizer is shown in Figure 3 attached below, and a closed-loop hydraulic synchronizer is shown in Figure 4 attached.…”

Section: Figure 2 Reasons For Two Cylinders Not Synchronizedmentioning

confidence: 99%

The application of immune neural network in the synchronous PID control system of double-cylinder hydraulic press

Liu

2023

International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2023)

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Hydraulic technology has been widely used in machinery manufacturing, and synchronization control is an important issue in the field of hydraulics. With the continuous development of the aerospace industry, the application of double-cylinder hydraulic technology in modern machinery is becoming more and more widespread, metallurgical equipment, metallurgical equipment, machine tools and other high-precision actuators, as well as the application of double-cylinder electro-hydraulic servo systems, are subject to inconsistent movements. As a result of non-uniform load, leakage, friction, resistance, manufacturing precision, hydraulic coil difference, structural elastic deformation, and so on. Therefore, the study of hydraulic synchronization control technology is especially important. This paper presents an immune neural network based PID controller to improve the synchronization precision of a two-cylinder hydraulic system. On the basis of the above, a new design method for the valve control cylinder of a double-cylinder forging hydraulic press is presented. In order to overcome the drawback that the conventional PID controller cannot be adaptively adjusted, the immune algorithm is adopted to monitor the operation condition of the system, and the PID parameters are dynamically adjusted on this basis, so as to improve the timeliness and effectiveness of the PID control; in the immune algorithm, the accuracy of the adjustment function construction will have a great impact on the accuracy of its construction. The validity and validity of the proposed method have been verified by simulation experiments.

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“…The relationship between the return clearance and the resultant force of the valve plate was discussed. The relationship among actuator parameters was studied by establishing a mathematical model considering the backflow clearance and impact rebound of the actuator [24].…”

Section: Introductionmentioning

confidence: 99%

Clearance Nonlinear Control Method of Electro-Hydraulic Servo System Based on Hopfield Neural Network

Wang,

Song

2024

Machines

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The electro-hydraulic servo system has advantages such as high pressure, large flow, and high power, etc., which can also realize stepless regulation, so it is widely used in many engineering machineries. A linear model is sometimes only a simple approximation of an idealized model, but in an actual system, there may be nonlinear and transient variation characteristics in the systems. Coupling is reflected in the fact that the components or functional structures implemented by each system used for the design of hydraulic systems are not completely or independently related to each other, but affect each other. The nonlinear clearance between the actuator and the load reduces the control accuracy of the system and increases the impact, thus losing stable working conditions. In the paper, based on the nonlinear clearance problem of the electro-hydraulic servo system, a mathematical transfer model with clearance is established, and on this basis, a clearance compensation method based on the Hopfield neural network is proposed. In this way, clearance compensation can be realized by adjusting the parameters of neural network nodes, through simple and convenient operation. Finally, by setting different clearance values, the results of the step response and sine response curve before and after clearance compensation of the hydraulic system are compared, and the effectiveness of Hopfield neural network compensation clearance control is verified based on the comparison simulation results.

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Optimization Design of Actuator Parameters with Stepless Capacity Control System Considering the Effect of Backflow Clearance

Cited by 6 publications

References 15 publications

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

The application of immune neural network in the synchronous PID control system of double-cylinder hydraulic press

Clearance Nonlinear Control Method of Electro-Hydraulic Servo System Based on Hopfield Neural Network

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