Physical Model-based Rapid Quantitative Diagnosis of Solenoid On–Off Valve Spool Stiction Faults

IF 2.9 4区 综合性期刊 Q1 Multidisciplinary
Hao Tian, Sichen Li, Yongjun Gong
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引用次数: 0

Abstract

Solenoid valves enable flow and motion control functions in the fluid power systems. Even today, on-line diagnosis of fluid power systems still remains a challenging task due to the computational cost and availability of machine operation data sets. For the prior, rapid fault diagnosis of the solenoid fault is of great economic values to the reduction in downtime maintenance. For the latter, currently the data for training networks are the major obstacles, as some of the rare faults are simply unavailable from the usual maintenance data. Facing the challenges, this paper presents a new way of quantifying the spool stiction severeness, a common fault in the solenoid on–off valves, using a proposed coupled physical model, where only temporal features from the solenoid coil driving current were extracted and applied for rapid diagnosis, without the need of spool displacement information. A test system was constructed in laboratory and different settings of valve spool stiction from normal to completely jammed were realized on the hardware. The developed coupled model is validated experimentally and demonstrates the capabilities in capturing the stiction effects. The quantitative diagnosis model based on temporal feature vectors was also tested and compared to the true stiction level, and the proposed sigmoid weightings have shown high prediction accuracy. The initial results have shown that the proposed model can quantify the spool stiction degree with accuracy at least 90% and with computation time less than 500 ms with a CPU at lower than 1.3 GHz.

Abstract Image

基于物理模型的电磁开关阀阀芯卡滞故障快速定量诊断
电磁阀可在流体动力系统中实现流量和运动控制功能。时至今日,由于计算成本和机器运行数据集的可用性,流体动力系统的在线诊断仍然是一项具有挑战性的任务。对于前者而言,快速诊断电磁阀故障对于减少停机维护时间具有重要的经济价值。对于后者,目前训练网络的数据是主要障碍,因为一些罕见故障根本无法从通常的维护数据中获取。面对这些挑战,本文提出了一种量化电磁开关阀常见故障--阀芯卡滞严重程度的新方法,即使用一个拟议的耦合物理模型,仅从电磁线圈驱动电流中提取时间特征并用于快速诊断,而无需阀芯位移信息。在实验室中构建了一个测试系统,并在硬件上实现了从正常到完全卡死的不同阀芯卡滞设置。实验验证了所开发的耦合模型,并证明了其捕捉卡滞效应的能力。基于时间特征向量的定量诊断模型也进行了测试,并与真实的卡滞水平进行了比较,所提出的 sigmoid 权重显示了较高的预测精度。初步结果表明,建议的模型可以量化阀芯粘滞程度,准确率至少达到 90%,在 CPU 频率低于 1.3 GHz 的情况下,计算时间少于 500 毫秒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Arabian Journal for Science and Engineering
Arabian Journal for Science and Engineering 综合性期刊-综合性期刊
CiteScore
5.20
自引率
3.40%
发文量
0
审稿时长
4.3 months
期刊介绍: King Fahd University of Petroleum & Minerals (KFUPM) partnered with Springer to publish the Arabian Journal for Science and Engineering (AJSE). AJSE, which has been published by KFUPM since 1975, is a recognized national, regional and international journal that provides a great opportunity for the dissemination of research advances from the Kingdom of Saudi Arabia, MENA and the world.
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