ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Modeling, performance analysis and test verification of a low-power digital valve
Received date: 2024-05-28
Revised date: 2024-06-25
Accepted date: 2024-07-23
Online published: 2024-09-09
Supported by
National Natural Science Foundation of China(51975507);Natural Science Foundation Youth Project of Hebei(E2024203157);Science Research Project of Hebei Education Department(QN2024237);Natural Science Foundation of Hebei(E2021203250)
The high-speed switching digital valve is a critical control component in aviation hydraulic systems， directly impacting aircraft performance and operational safety. The response time serves as the primary indicator for evaluating digital valves. By enhancing the excitation voltage， the dynamic characteristics can be effectively improved， but this can lead to excessive energy consumption and temperature rise， resulting in performance degradation such as reduction in electromagnetic force and even safety accidents like breakdowns or burns. To solve these issues， a novel low-power digital valve was proposed to incorporate a permanent magnet into the magnetic circuit. This design allows the valve to maintain its working state using its magnetic field while instantaneous voltage excitation only occurs during opening and closing processes to reduce power consumption. This approach helps alleviate the design contradiction between high response speed and low temperature rise of digital valves. Based on this concept， the theoretical models and finite element models were established for low-power digital valves under hybrid excitation from both permanent magnet magnetic fields and electromagnetic fields respectively. The influence of key parameters are studied on electromagnetic characteristics， dynamic characteristics， and energy consumption characteristics. Finally， the test bench for digital valves were constructed to verify simulation model and analysis results. The test results demonstrate that compared to the traditional digital valve with advanced control method， the low-power digital valve exhibits a 49.3% reduction in opening response time， a 35.6% reduction in closing response time， and a 20% extension of the flow controllable range. Additionally， under high duty cycle conditions， the temperature rise of the low-power digital valve can be reduced by up to 40 ℃ without being affected by the duty cycle. Therefore， the implementation of low-power digital valves holds significant importance for enhancing aviation hydraulic system performance and safety.
Jing YAO , Shuai YANG , Mengyang WANG , Pei WANG . Modeling, performance analysis and test verification of a low-power digital valve[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(2) : 430747 -430747 . DOI: 10.7527/S1000-6893.2024.30747
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