Design for improving the linearised flow control performance of large flow and high-pressure proportional valve
Autor: | Zhen Zhang, Liang Liang, Xudong Wang, Daihua Wang |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
hysteresis
magnetic circuits flow control feedforward valves solenoids feedforward control device quadratic inverse function model hysteresis problem simple magnetic circuit proportional solenoid valve digital proportional flow control no-load high-load performance tests linearised flow control performance variable flow-regulate system open-loop control high-linearity performance magnetic circuit structure balanced pressure structure Engineering (General). Civil engineering (General) TA1-2040 |
Zdroj: | The Journal of Engineering (2020) |
Druh dokumentu: | article |
ISSN: | 2051-3305 |
DOI: | 10.1049/joe.2020.0042 |
Popis: | To improve the linearisation of the variable flow-regulate system under the open-loop control, a proportional solenoid valve with high-linearity performance was developed to meet that requirement of the high-precision and open-loop control. The design of the proportional solenoid valve evolves the optimisation of a magnetic circuit structure, the construction of a balanced pressure structure and the compensation of a feedforward control device. As for the solenoid, it is very challenging to meet the requirement of 95% linearity. A feedforward control device with the Bouc–Wen model and a quadratic inverse function model is a good solution to address the hysteresis problem and achieve better performance. The optimisation of a simple magnetic circuit with low sensitivity to the moving armature and a balance chamber for removing the pressure difference are both preconditions to make the compensation. The feedforward control device is the next step to eliminate the hysteresis problem and non-linear characteristics of the solenoid by solving model coefficients measured in the test. After the improvement in these aspects, the proportional solenoid valve can meet the demand of digital proportional flow control with >98% linearity and excellent repeatability, through the validation of both no-load and high-load performance tests. |
Databáze: | Directory of Open Access Journals |
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