基于模糊诊断原理的航空液压油泵车故障诊断系统的研究

Study on fault diagnosis system for aircraft hydraulic power cart based on fuzzy diagnosis theory

航空液压油泵车是重要的航空地面保障装备,其结构复杂,故障率较高,开发故障诊断系统对保证油泵车具有高可靠性和良好的维修性具有重要意义。本文结合某新型航空液压油泵车的研制提出了一种基于模糊诊断原理的航空液压油泵车故障智能诊断方法。通过对油泵车故障模式的研究确定了故障征兆、临界指标及故障成因,基于模糊诊断原理建立了油泵车故障智能诊断数学模型,现场实际运行测试及大量故障诊断实例表明,本系统实现了航空液压油泵车故障的准确快速诊断。

Aircraft hydraulic power carts are important aviation support equipment. Because of their com-plex structure they have high failure rate. Therefore fault diagnosis system for hydraulic power carts is nec-essary to ensure high reliability and maintainability for hydraulic power carts. This paper presents a diagno-sis method based on fuzzy diagnosis theory in the developing process of a new type of hydraulic power carts. The fault symptom, critical value and fault origin are established based on the research of fault mode for hydraulic power carts. Also the mathematical model of fault diagnosis for hydraulic power carts is estab-lished based on fuzzy diagnosis theory. The practical test results and fault diagnosis instances show that with this fault diagnosis system fast fault diagnosis for hydraulic power carts can be successfully carded out.