A Simulation Study of an Electro-Hydraulic Load-Sensitive Variable Pressure Margin Diverter Synchronous Drive System with Time-Varying Load Resistance
Abstract
:1. Introduction
- (1)
- The EHLS drive system was constructed, and variable load-sensitive pressure margin control was realized;
- (2)
- The diverter valve diverter synchronous technology was used in the EHLS synchronous drive system to construct the EHLS diverter synchronous drive system. It effectively improved the diverter synchronous accuracy of the system. However, it reduced the synchronous control performance of the system;
- (3)
- The solenoid pressure compensation valve replaced the conventional pressure compensation valve. The variable pressure compensation valve pressure margin control was realized;
- (4)
- The system synchronous control performance was ensured, and the system diverter synchronous accuracy was improved by variable pressure margin control.
2. Analysis of the System’s Working Principle
2.1. Analysis of the Working Principle of the Conventional System
2.2. Analysis of the Working Principle of the New System
3. Analysis of System Control Strategy
3.1. Variable Speed Control
3.2. Variable Load-Sensitive Pressure Margin Control
3.3. Variable Pressure Compensation Valve Pressure Margin Control
4. Analysis of Components’ Mathematical Model
4.1. PMSM Mathematical Model
4.2. Mathematical Modeling of Solenoid Pressure Compensation Valve
4.3. Mathematical Modeling of the Diverter Valve
5. System Modeling and Simulation
5.1. The EHLS Drive System
5.2. The EHLS Synchronous Drive System
5.3. The EHLS Diverter Synchronous Drive System
6. Discussion
7. Conclusions
- The EHLS drive system realizes the primary function of the load-sensitive system. It can realize the variable load-sensitive pressure margin control to regulate the differential pressure and flow rate before and after the multi-way valve;
- The EHLS synchronous drive system has poor synchronous control accuracy. It can realize variable pressure compensation valve pressure margin control to regulate the differential pressure and flow before and after the multi-way valve;
- The EHLS diverter synchronous drive system effectively improves the synchronous control performance of the system through variable pressure margin compensation control. The diverter system diverter error is reduced by 40.8%, and the diverter compensation system diverter error is reduced by 52.6% when the multi-way valve is fully opened. After the variable pressure margin compensation control, the diverter system effectively improves the diverter synchronous accuracy;
- The system provides a high-performance hydraulic synchronous drive solution under severe working conditions.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Components | Parameters | Value |
---|---|---|
Solenoid pressure compensation valve | Spool diameter | 0.01 m |
Zero displacement length | 0.003 m | |
Rated current | 0.04 A | |
Damping factor | 50 N/(m/s) | |
Spool quality | 0.01 kg |
Components | Parameters | Value |
---|---|---|
Diverter valve | Spring stiffness | 1000 N/m |
Spring pre-compression force | 10 N | |
Spool diameter | 0.01 m | |
Zero displacement length | 0.003 m | |
Maximum opening displacement length | 0.01 m | |
Spool quality | 0.01 kg |
Components | Parameters | Value |
---|---|---|
PMSM | Rated speed | 1500 rev/min |
Quantitative pump | Displacement | 0.0002 m3/rev |
Rated speed | 1500 rev/min | |
Safety valve | Cracking pressure | 28 MPa |
Proportional throttle | Maximum opening diameter | 0.01 m |
Minimum signal | 0 | |
Maximum signal | 1 | |
Proportional relief valve | Maximum opening pressure | 25 MPa |
Valve lagging pressure | 0 | |
Valve rated current | 0.25 A |
Components | System Performance | |
---|---|---|
The EHLS drive system | The variable load-sensitive pressure margin control is realized | |
The EHLS synchronous drive system | The variable pressure compensation valve pressure margin control is realized | |
The EHLS diverter synchronous drive system | Conventional system | The system diverter synchronous accuracy is low, and the maximum diverter error is 61% |
Diverter system | The synchronous control performance decreases, the maximum diverter error is 20.2%, and the diverter error is reduced by 40.8% | |
Diverter system after compensation | The synchronous control performance is guaranteed, the maximum diverter error is 8.4%, and the diverter error is reduced by 52.6% |
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© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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Du, W.; Luo, Y.; Luo, Y.; Mu, H. A Simulation Study of an Electro-Hydraulic Load-Sensitive Variable Pressure Margin Diverter Synchronous Drive System with Time-Varying Load Resistance. Processes 2024, 12, 170. https://doi.org/10.3390/pr12010170
Du W, Luo Y, Luo Y, Mu H. A Simulation Study of an Electro-Hydraulic Load-Sensitive Variable Pressure Margin Diverter Synchronous Drive System with Time-Varying Load Resistance. Processes. 2024; 12(1):170. https://doi.org/10.3390/pr12010170
Chicago/Turabian StyleDu, Wei, Yu Luo, Yanlei Luo, and Hongyun Mu. 2024. "A Simulation Study of an Electro-Hydraulic Load-Sensitive Variable Pressure Margin Diverter Synchronous Drive System with Time-Varying Load Resistance" Processes 12, no. 1: 170. https://doi.org/10.3390/pr12010170
APA StyleDu, W., Luo, Y., Luo, Y., & Mu, H. (2024). A Simulation Study of an Electro-Hydraulic Load-Sensitive Variable Pressure Margin Diverter Synchronous Drive System with Time-Varying Load Resistance. Processes, 12(1), 170. https://doi.org/10.3390/pr12010170